Smithy Midas 1220 XL Operator's Manual
MIDAS 1220 XL
COMBINATION LATHE/MILL/DRILL
OPERATOR’S MANUAL
Updated August, 2008
170 Aprill Dr., Ann Arbor, MI, USA 48103
Toll Free 1-800-476-4849
www.smithy.com
© 2008 Smithy Co. All rights reserved (Revision 1).
170 Aprill Dr., Ann Arbor, Michigan, USA 48103
Toll Free Hotline: 1-800-476-4849
Fax: 1-800-431-8892
International: 734-913-6700
International Fax: 734-913-6663
All images shown are from Midas 1220 XL machine.
All rights reserved. No part of this manual may be reproduced or transmitted in any form
by any means, electronic, mechanical, photocopying, recording, or otherwise,
without prior written permission of Smithy Co. For information on getting permission for
reprints and excerpts, comments, or suggestions, contact info@smithy.com
While every precaution has been taken in the preparation of this manual, Smithy Co. shall not
have any liability to any person or entity with respect to any loss or damage caused or
alleged to be caused directly or indirectly by the instructions contained in this manual.
Please see section on warranty and safety precautions before operating the machine.
Printed and bound in the United States of America.
Table of Contents
Inventory Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .i-iv
Chapter 1: Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Chapter 2: Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Chapter 3: Knowing Your Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Chapter 4: Caring For Your Machine . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Chapter 5: Basic Parts of the MI-1220 XL . . . . . . . . . . . . . . . . . .5-1
Chapter 6: Uncrating and Setting Up the MI-1220 XL
Moving the machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1
Uncrating and Positioning the machine . . . . . . . . . . . . . . . . . . . . . .6-1
Millhead . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Tailstock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Three Jaw Chuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-2
Selecting Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-4
Cleaning and Lubricating the MI-1220 LTD . . . . . . . . . . . . . . . . . . . .6-4
Oiling the Headstock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Oiling the Ways . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Oiling the Carraige . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-5
Oiling the Tailstock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Oiling the Apron . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-6
Oiling the Leadscrew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-7
Oiling the Compound Angle Toolpost . . . . . . . . . . . . . . . . . .6-7
Setting Up Your MI-1220 XL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Setting Lathe and Mill Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Adjusting Belt Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-9
Adjusting Gibs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-10
Reducing Backlash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-11
Crossfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-11
Longfeed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-12
Running in the MI-1220 XL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-12
Chapter 7: Turning
Turing Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
Gear Ratios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-3
Chapter 8: Metalcutting Theory
Tool Sharpness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-2
Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-3
Chapter 9: Grinding Cutter Bits for Lathe Tools
High Speed Steel Cutters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-1
Materials Other than Steel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-3
Bits for Turning and Machining Brass . . . . . . . . . . . . . . . . . . . . . . . .9-4
Special Chip Craters and Chipbreakers . . . . . . . . . . . . . . . . . . . . . . .9-4
Using a Center Gauge to Check V-Thread Forms . . . . . . . . . . . . . .9-4
Acme or Other Special Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-5
Carbide-Tipped Cutters and Cutter Forms . . . . . . . . . . . . . . . . . . . . .9-5
Chapter 10: Setting Up Lathe Tools
Cutting Tool Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
Turning Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1
Threading Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2
Cutoff, Thread Cutting and Facing Tools . . . . . . . . . . . . . . . . . . . . .10-3
Boring and Inside Threading Tools . . . . . . . . . . . . . . . . . . . . . . . . .10-3
Chapter 11: Setting Up with Centers, Collets and Chucks
Centering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-1
Centering a Round and Rectangular Steels . . . . . . . . . . . . . . . . . .11-2
Mounting Work between Centers . . . . . . . . . . . . . . . . . . . . . . . . . .11-4
Using a Clamp Dog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-4
Setting Up Work on Mandrel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-6
Steady Rest and Follow Rest . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-6
Setting Up Work in a Chuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-8
Mounting Work in a Four-Jaw Independent
Lathe Chuck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-8
Mouting Work in a Three-Jaw Universal Chuck . . . . . .11-10
Collet and Collet Attachements . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-11
Toolpost Grinders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11-12
Chapter 12: Lathe Turning
Rough Turning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-1
Finish Turning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-2
Turning to Shapes
Machining Square Corners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-3
Taper Turning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-4
Boring a Tapered Hole
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12-6
12-2
Chapter 13: Lathe Facing and Knurling
Facing Across the Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-1
Knurling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-2
Chapter 14: Changing Gears . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14-1
Chapter 15: Cutting Screw Threads
Threading Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-1
Cutting Right Hand Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-3
Cutting Left Hand Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-4
Cutting Multiple Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-4
What Not To Do When Cutting Threads . . . . . . . . . . . . . . . . . . . . .15-5
Finishing Off a Threaded End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-5
Cutting Threads on a Taper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-5
Chapter 16: Lathe Drilling and Boring
Reaming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-1
Boring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-2
Cutting Internal Threads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-4
Cutting Special Form Internal Threads . . . . . . . . . . . . . . . . . . . . . .16-5
Chapter 17: Cutting Off or Parting with a Lathe . . . . . . . . .17-1
Chapter 18: Milling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18-1
Chapter 19: Workholding
Mounting to the Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-1
Using a Vise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-1
Dividing Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-2
Rotary Tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19-2
Chapter 20: Holding Milling Cutters
Arbors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-1
Collets and Holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-1
Adaptors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20-2
Chapter 21: Milling Cutters
End Mill Cutters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-1
Plain Milling Cutters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-3
Side Milling Cutters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-3
Inventory Check List
It is a good idea to take inventory of the parts of your machine soon after it is unpacked.
By doing so, you can quickly determine if any parts are missing. In addition, should you
find it necessary to return the machine to Smithy for any reason, the inventory will ensure
that all the parts you received have been returned. It is also good to take a look at the
inventory before you operate the machine so that you can be familiar with the names of
all the parts of your Smithy machine.
q Dead Center, MT3
Item #: 41-003
Quantity 1
q Dead Center, MT4
q Allen Wrench, 4mm
Item #: C30540
Quantity 1
rench, 5mm
q Al
len W
Item #: C30542
Quantity 1
q Dri
Item #: 41-004
Quantity 1
ll chuck, 1/2”
Item #: 72-001
Quantity 1
q Al
q Al
len Wrench, 6mm
Item #: C30537
Quantity 1
len Wrench, 8mm
Item #: C30536
Quantity 1
q Wrench, 14 mm
Item #: 81-500
Quantity 1
q Arbor
, JT33-MT3
ang)
(No T
Item #: C30523
Quantity 1
q Drift, MT2
Item #: C30558
y 1
Quanti
t
q Gear, 32 Teeth
Item #: C30145
Quantity 2
q Gear, 33 Teeth
Item #: C30146
Quantity 1
eeth
q Gear
q Gear
, 39 T
Item #: C30148
Quantity 1
eeth
, 40 T
Item #: C30149
Quantity 1
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i
Midas 1220 XL Operator’s Manual
q G
ear, 42 Teeth
Item #: C30150
Quantity 1
q Gear, 45 Teeth
Item #: C30156
Quantity 1
q Gear, 48 Teeth
Item #: C30151
Quantity 1
q Gear, 49 Teeth
Item #: C30152
Quantity 1
q Gear, 50 Teeth
Item #: C30153
Quantity 1
q Gear, 56 T
Item #: C30157
Quantity 1
q Gear, 60 T
Item #: C30159
Quantity 1
eeth
eeth
q G
ear, 63 Teeth
Item #: C30160
Quantity 1
q Jaws (3), 5”
Item #: 9-10
Quantity 1 set of 3
q Key, Lathe Chuck
Item #: C30532
Quantity 1
q K
ey, Drill Chuck
Item #: C30533
Quantity 1
q Open End Wrench,
8/10mm
Item #: C30539
Quantity 1
q Open End W
17/19mm
Item #: C30535
Quanti
rench,
ty 1
q Gear, 70 Teeth
Item #: C30202
Quantity 1
Gears on the machine:
q Gear, 27 Teeth
Item #: C30143
Quanti
ty 2
q Gear, 30 Teeth
Item #: C30144
Quantity 1
q Gear, 60 Teeth
Item #: C30159
Quanti
ii
ty 1
q Adapter Precision
End Mill
Item #: 65-010
Quantity 1
q End Mill Single
4 FHS
Item #: 50-402
Quantity 1
For Assistance: Call Toll Free 1-800-476-4849
S 3/8 1/4”
Inventory Checklist
q E
nd Mill Single
4 FHSS 3/8 3/8”
Item #: 50-406
Quantity 1
q End Mill Single
4 FHSS 3/8 1/4”
Item #: 50-410
Quantity 1
q T-Slot Nut, 7/16”
Item #: 35-105
Quantity 2
q W
asher,
Anti-Back Lash Shim
Item #: 82-050
Quantity 3
q Vise, Bracket Bolt
3/8 x 1-1/4”
Item #: 36-610
Quantity 2
q Plug, Drill Chuck Arbor
Item #: S12898
Quantity 1
q Air Mask
Item #: 15-020
Quantity 1
q Goggles
Item #: 15-015
Quantity 1
q Ear Plug
Item #: 15-025
Quantity 1
,
wbar
q Dr
a
3/8 x 16 x 14”
Item #: 75-A
Quantity 1
q Nut, 3/8 16
Item #: 7-6
Quantity 1
q Vise, 0-90 Degrees
Adjustable Angle 3-1/4” Jaw
Item #: 32-110
Quantity 1
q Carbide Bit Set
Item #: 43-000
Quantity 1
q Machine Tool
asics (DVD)
B
Item #: 12-004
Quantity 1
q Cutting Fluid/ Tapping
Item #: 49-101
Quanti
ty 1
q Washer,
Flat 5/16”
Item #: 7-8
y 1
Quanti
t
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iii
Midas 1220 XL Operator’s Manual
q O
perator’s Manual
Item #: 83-949
Quantity 1
q 5
” 3 Jaw Chuck
Part # C30532
Quantity 1
q Manual Cover
Item #: 83-942
Quantity 1
q Oil Can
Part # 80-100
Quantity 1
q Compound
Angle Toolpost
Part # 45-110
Quantity 1
Missing Items?
If you find that an item is missing or defective from your Quick Start Tool Pack
Call Us TOLL FREE 1-800-476-4849
or send an e-mail to info@smithy.com
within 30 days of receiving your machine so that we may assist you immediately.
Our sales and service technicians are available 8am to 5pm ET, Mondays to Fridays.
iv
For Assistance: Call Toll Free 1-800-476-4849
Chapter 1
Introduction
Congratulations on purchasing a Smithy Midas 1220 XL lathe-mill-drill. We are pleased
you chose Smithy to fulfil your machining needs.
The purpose of this manual is to give the machinist, beginniner or advanced, the
information he needs to operate the Smithy Midas 1220 XL. It will teach you about the
machine's parts and how to care for them. In fact, education is our primary goal. We'll
explain how to grind cutters, set up lathe tools, hold workpieces, and do all basic
machining operations.
Please read this operator's manual carefully. If you don't understand how your machine
works, you may damage it, your project, or yourself. If you want to learn more about
machining practices, Smi
experience. We also suggest using your local library as a resource. Enrolling in a
machining class will give you the best knowledge of machining.
If you have any questions not covered in this operator's manual, please call Smithy Co.
ained technicians wi
Our tr
can reach them by dialing 1-800-476-4849 Monday through Friday, 8:00 am to 5:00 pm
Eastern time.
thy offers books that meet the needs of machinists at all level of
ll help you with any machining problems you may have. You
We are always interested in your suggestions to improve our products and services. Feel
free to contact us by phone or in writing. If you have comments about this operator's
manual, or if you have a project you'd like to share with other Smithy owners, contact the
Communications Dir
We look forward to a long working relationship with you. And thank you again for putting
your trust in Smithy.
ector
thy Co
, Smi
., PO B
ox 1517, Ann Arbor, MI48106-1517.
Customer Information
This manual should remain with your Smithy machine. If ownership changes, please
include the owner's manual with the machine.
Model # ________________________________________
Serial #_________________________________________
(on the back of the lathe bed)
Purchase date ___________________________________
Delivery date ____________________________________
Sales Technician__________________________________
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Chapter 2
Safety
Your workshop is only as safe as you make it. Take responsibility for the safety of all who
use or visit it. This list of rules is by no means complete, and remembers that common
sense is a must.
1. Know your machine. Read this manual thoroughly before attempting to operate your
lathe-mill-drill. Don't try to do more than you or your machine can handle. Understand
the hazards of operating a machine tool. In particular, remember never to change speeds
or setups until the machine is completely stopped, and never to operate it without first
rolling up your sleeves or tying them at your wrists.
2. Ground the machine. The Midas 1220 XL has a three conductor cord and a three
pronged gr
grounding the machine.
3. Remove all adjusting keys and wrenches from the machine before operating. A chuck
key or misplaced Allen wrench can be a safety hazard.
ounding type receptacle. Never connect the power supply without properly
4. Keep your work area clean and organized. Cluttered work areas and benches invite
accidents. Have a place for everything and put everything in its place.
5. Keep children away from the machine while it is in use. Childproof your shop with
padlocks, master switches, and starter keys, or store the machine where children do not
have access to it.
6. Wear appropriate clothing. Avoid loose fitting clothes, gloves, neckties, or jewellery
that could get caught in moving parts. If you have long hair, tie it up or otherwise keep
it out of the machine.
y glasses, goggles, or a face shield at all times. Use glasses designed for
7. Use saf
machinery operation; regular glasses will not do. Have extras for visitors. Know when to
wear a face mask and earplugs, as well.
8. Check for damaged parts. Make sure the machine will run properly before operating it.
9. Disconnect the machine before servicing and when changing accessories. Shut power
off before making changes, removing debris, or measuring your work. Don't reach over
the machine when i
10. Avoid accidental starts. Turn the switch to Off before plugging in the machine.
et
t's oper
ating. K
ou hands out of the w
eep y
.
y
a
11.Secure your work. Flying metal is dangerous. Loose work can also bind tools.
12. Use the r
out.
ecommended ac
2-1
cessories. Understand how to use them bef
For Assistance: Call Toll Free 1-800-476-4849
e trying them
or
13. Use the correct tool for the job. Don't try to make a tool into something it isn't.
14. Keep your mind on your work.
Pay attention to these simple rules and you will spend many safe, enjoyable hours in your
workshop.
Remember: Your safety largely on your practices. Modifying your machine may void the
warranty and create potential hazards.
Safety
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Chapter 3
Knowing Your Machine
The Midas 1220 XL has a 3/4 hp, 110 V motor. The motor powers the lathe and millhead
through the main belt drive and the mill/drill belt drive.
A positive lock clutch in front of the spindle pulley transfers power to either the lathe or
the mill. The clutch has three positions. To power the lathe, pull the clutch handle out. To
power the mill, push the clutch all the way in. The middle position is neutral. Always shift
the clutch with the motor turned off.
The Smithy can use V-belts or round polyurethane belts. The latter produce less dust and
is easier to change than standard V-belts.
The lathe runs at six speeds from 160 to 1600 rpm. To change lathe speeds, adjust the
belts in the main belt-drive system. This system uses three pulleys: the motor pulley,
floating idler pulley and spindle pulley.
To run the lathe at lower turning speeds, use two belts. Install one between the motor
and idler pul
speed, move the spindle belt in two more positions on the pulleys.
leys and the other between the idler and spindle pul
leys. To increase the
For higher ranges, use one long belt from the motor pulley directly to the spindle pulley.
You can adjust this belt to three different positions on the pulleys.
The millhead also has a belt-drive system. It uses only one belt, adjustable to either the
top or bot
belt drive, let you select 12 speeds ranging from 125 to 1600 rpm for milling or drilling.
tom posi
tion on the pul
leys. These two positions, in conjunction wi
th the main
3-1
For Assistance: Call Toll Free 1-800-476-4849
Chapter 4
Caring For Your Machine
The Midas 1220 XL is a delicate, precision tool with ground ways and hand-scraped
bearing surfaces under the table and carriage. Any rust spot or battering of the ways, any
chips or grit between close fitting parts, will affect the accuracy of this fine tool. Follow
these guidelines whenever you use your Smithy machine.
When you finish working, wipe machined surfaces with a clean, oily rag. Never leave the
machine without this thin film of protective oil over all parts that might rust, especially
ground finished parts.
Never lay wrenches, cutting tools, files, or other tools across the ways of your lathe. The
slightest dent or burr could impair its accuracy.
ore inserting collars, centers, adapters, or drawbar attachments in either the spindle
Bef
or tailstock spindle, wipe them with a clean, oily rag. Also wipe all internal surfaces
carefully with an oily rag on a ramrod. Chips or dirt on the centers or in the spindle nose
can scratch or mar surfaces and interfere with the assembled part's alignment.
Lubricate the machine befor
e each use (see Section 6.4)
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Chapter 5
Basic Parts of the MI-1220 XL
To learn the operations of your machine, you have to know the names and functions of
its basic parts.
6
20
19
8
11
10
7
4
2
5
9
1
15
Figure 5.1 Basic parts of the MI-1220 XL
21
17
16
1.
Bed
- The B
for absolute rigidity. The two ways on the top are the tracks on which the carriage and
tailstock travel. To maintain an exact relationship between toolpoint and workpiece from
one end of the machine to the other
aligned to the line of centers and to one another.
5-1
ed (Figure 5.1) is the machine's foundation. It is heavy, strong and built
ys must be absolutely true and ac
, the w
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a
cur
ately
Basic Parts of the MI-1220 XL
2.
Carriage
- The carriage consists of the saddle and apron. It moves by hand or power
along the bed, carrying the cross slides, compound rest, and toolpost. Its function is to
support the cutting tool rigidity and move it along the bed for different operations. It locks
into place by tightening the carriage lock under the cross slide handwheel.
3.
Change Gears
- The change gears cut different thread pitches. They also determine
the feed rate. Five change gears come installed on the machine; others are packed with
it.
Figure 5.2 Your machine arrives with this gear configuration. The C gear, behind B
meshes with D. Note the top two gears are permanent.
4.
Compound Rest
- Mounted on the cross slide, the compound rest swivels to any
angle horizontal to the lathe axis to produce bevels and tapers. Cutting tools fasten to a
toolpost on the compound r
est. The calibrations on the front of the base are numbered
in degrees from 60 degree right to 60 degree left.
5.
Cross Slide
- The T
-slotted cross slide (Figure 5.1 and 5.3) moves crosswise at 90
degree to the lathe axis by manual turning of the cross-feed screw hand-wheel. It also
serves as the milling table.
Gib Adjustment
Screws
Saddle
Gib Adjustment
Screw
Cross Slide
Lock
Cross Slide
Handwheel
Figure 5.3 The cross slide moves laterally when you turn the cross slide handwheel.
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Midas 1220 XL Operator’s Manual
6.
Drill Press and Fine Feed Clutch
- Pushing in the drill-press clutch engages the fine
feed. To work the clutch, release the spring tension by rotating the drill-press handles
clockwise. Pull the clutch out to use it as a drill press or push it in to the fine feed. Use
the fine-feed handwheel to move the quill up and down.
7.
Forward / Off / Reverse Switch -
This is the main switch used to operate the
lathe. It is simply a forward / reverse switch for the motor. The motor turns counter
clockwise for normal lathe operation and clockwise for normal milling and drilling.
8.
Gearbox
- The gearbox (Figure 5.1 and 5.4) houses the belts that drive the spindle
and change gears for the powerfeed. Select the thread pitch (for threading) or the feed
rate (for turning) by changing the four change gears on the right side of the gear box.
Figure 5.4 The gearbox houses the belts and change gears.
9.
Half-nut Engagement Lever
- This lever, located on the apron, transmit power to
the carriage when rotated 90 degrees to the right.
10.
Half-nut Speed Selector
- The two-speed selector for powering the leadsrew is on
the front of the headstock. The leadscrew turns twice as fast in the II position as in the
tion.
I posi
11.
Headstock
- The headstock, which is secured to the bed, houses the gears that drive
the powerfeed and the taper bearings that secure the lathe spindle.
12.
5-3
Lathe Belt Tensione
d to tighten the bel
ar
handle f
orw
r - To adjust the lathe belt (Figure 5.5), pull the tensioner
t, back to loosen i
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t.
Basic Parts of the MI-1220 XL
Figure 5.5 To adjust the tension on the lathe belt, move the tensioner handle forward or back.
13.
Lathe / Mill / Drill Clutch
- The lathe/mill/drill clutch (Figure 5.4) are inside the
gearbox. A three-position clutch, it transfers power to either the lathe or the mill, but not
to both at the same time. T
o engage i
t, rotate it slowly while pushing or pulling on the
clutch sleeve. Pulling it to the left runs the lathe, to the right (all the way in) runs the
mill/drill. The middle is neutral.
14.
Lathe Spindle
- The end of the lathe spindle face in the tailstock is the spindle nose.
The spindle nose, which has an MT4 taper, rotates the workpiece and drives lathe chucks
and other work holding devices. All attachments such as three and four jaw chucks bolt
to the spindle flange ei
15.
Leadscrew
for lathe turning or thread cut
ther directly or via an adapter plate.
- The leadscrew, which runs the length of the bed, moves the carriage
ting. It works both manual
ly and under power. You can also
use it manually with the mill.
16.
Locks
- Locks on the cross slide (Figure 5.3) carriage (Figure 5.1), quill (Figure 5.6),
and tailstock (two), Figure 5.1 and 5.7, keep them from moving. During machining, lock
all lock except the one on the part you want to move.
Figure 5.6 The quill moves in and out of the millhead, carrying the spindle.
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Midas 1220 XL Operator’s Manual
17.
Micrometer Dial Collars
- Just inside the handles of the tailstock (Figure5.1),
crossfeed (Figure 5.1), drill press (Figure 5.1), compound feed (Figure 5.1), and
leadscrew (Figure 5.1) there are collars calibrated in inches. The compound feed,
leadscrew, and crossfeed are calibrated in two thousandths, the tailstock in thousandths,
and the drill press in 40-thousandths.
These micrometer dial collars can move independently around the handle shafts. This
independent motion is called float. Floating dials on the cross slide, tailstock, and
leadscrew let you zero the collars at any point and read the feed travel from that point
on the dial for added accuracy.
18.
Mill Belt Tensioner -
To adjust the mill belt (Figure 5.7), swing the roller assembly
to the front and place the belt on the back of the roller. Loosen the roller assembly and
slide it back and forth in its slot.
Figure 5.7 With the millhead cover off, you can adjust the mill-belt tension.
19.
Millhead Height Adjustment
- Unlock the mi
ll-head lock and place the height
adjustment handle in one of the three holes in the black collar. Turn the collar to raise
and lower the millhead.
20.
Mill Spindle
- The mill spindle (Figure 5.7) attaches to the quill, which moves in and
out of the head. The quill lock keeps the quill still when you install or remove tools from
it and while milling horizontally. Usually, tools fit into collets that attach through the
wbars.
spindle via dr
21.
Tailstock
a
- The tailstock, which provides right-end support for the work, moves
along the bed and can stop at any point. It has an MT3 taper and holds centers, drills,
reamers, taps and other tools. To move the tailstock spindle, turn the tailstock hand
wheel.
To offset the tailstock, adjust the two base-locking bolts (Figure 5.8). To offset to the left,
loosen the left adjusting bolt and tighten the right. To offset to the right, loosen the right
adjusting bolt and tighten the left.
5-5
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Tailstock Setover
Screw
Right Tresle
Setscrew
Basic Parts of the MI-1220 XL
Tailstock Base-
Locking Bolts
Figure 5.8 To offset the tailstock, adjust the base-locking bolts.
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Chapter 6
Uncrating and Setting Up The MI-1220 XL
Moving the Machine
Moving a machine tool can be dangerous. Improper techniques and methods may injure
you and/or damage the machine. To find a professional to move and site your Smithy
machine to look in your local Yellow Pages under “Machine Tools, Moving and/or Rigging.”
If there is no such listing or your community does not have a rigging specialist, a local
machine shop or machinist may be able to provide a referral.
When you pick up the machine at the shipping terminal, bring a crowbar, tin snips for
cutting the metal straps, and a hammer. If there is obvious shipping damage to the crate,
you'll be able to inspect the machine before signing for it. Note any damage on the bill
of lading (shipping document). Fill out the claims form and notify both Smithy Co. and
the shipping terminal about the damage. Failure to notify both parties can complicate
and/or invalidate a claims process.
Trucking compan
ient to transport the machines in trucks wi
y terminals usually have forklifts to assist customers. It's most conven-
thout canopies and lar
ge vans.
Uncrating and Positioning the Machine
The machine is assembled, inspected and ready to go on its stand when you receive it.
It's wrapped in a water and greaseproof cover, strongly braced, and crated. A box of
cessories is also in the crate.
ac
The metal bands ar
under tension. Wearing eye protection
and gloves, cut the metal bands with tin
snips. Be careful- the cut edges are
. The band secur
sharp
the base.
After removing the straps, lift off the
crate top. Tip the crate from the tailstock
end up and over the machine (Figure
6.1). Do not damage the cr
need i
machine.
t another time to transport the
ound the crate are
es the cr
ate top to
ate; y
ou ma
y
Figure 6.1 Tip the crate from the tailstock end up
and over the machine.
6-1
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Uncrating and Setting Up the MI-1220 XL
Now open the accessories box. Check the items in it against the accessory checklist. After
accounting for all parts, you're ready to move your Midas 1220 XL into its work position.
Four men can move the Midas 1220 XL using the four lifting handles (Figure 5.1). You
can reduce the weight so two people can move it by following these instructions:
Millhead
1. Remove the four hexagon socket-head capscrews at the base of the millhead support
column (Figure 6.2). If a screw runs through the belt box into the flange of the support
column, remove it too.
Figure 6.2 Remove the millhead and column from the lathe head.
2. Lock the millhead locking handle (Figure 5.1)
3. Lift the millhead and column off the lathe head (Figure 6.2). You may have to rock it
back and forth while lifting it.
Tailstock
1. Loosen the tai
gib and the locking pin will fall out. Be careful not to lose them.
lstock locks (Figur
e 5.1) and pull the tailstock off the end of the bed. The
Three-jaw Chuck
ts behind the chuck that hold it to the spindle flange (Figure 6.3).
e the thr
v
emo
1. R
The chuck will come off. Place a board between the chuck and ways to protect the ways.
ee bol
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Midas 1220 XL Operator’s Manual
Bolts
Figure 6.3 The chuck attaches to the spindle flange with three bolts.
The one bolt located on the other side of the spindle does not show.
Put the machine on a str
ong, rigid table 40” long x 24” wide x 28 – 33” high. We
recommend you bolt down the machine using the holes in the base of the bed or using
the lifting handles the same way they held the machine to the shipping pallet.
Caref
ly lift the machines b
ul
y the handles, move it over the stand, and lower it into
position. Do not let any part of your body come between the machine and the stand. Bolt
the machine to the stand, using one flat washer and one lockwasher per bolt.
Before permanently anchoring the machine, you may want to level the bed (Figure 6.4).
The bed is rigid and supports itself, but having a level bed simplifies many setup
operations. Use a pr
ecision level, both along and acr
oss the bed (Figure 6.5). Shim up
any low points with sheet metal or other noncompressible material. After tightening the
anchor bolts, check the bed again.
Figure 6.4 Check along and across the bed to make sure it is level.
6-3
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Uncrating and Setting Up the MI-1220 XL
Figure 6.5 To check bench and bed level accuracies, successively place level at A, B, C, D
(longitudinal positions) and E and F (transverse position). Bedways alignment in the
longitudinal plane should be better than 0.0016/40” ; alignment in the transverse
plane should be better than 0.0024/40”.
Selecting a Location
There are several major considerations when selecting a location for your Smithy:
1. Operation is from the apron side, so allow at least 40 – 48” clearance in front of the
machine.
2. The machine should be on a 30amp circuit and close to the power outlet. If you must
use an extension cor
d, check wi
th an electrician to make sure the cable can handle the
electrical load.
3. Provide ample working light over the operator's shoulder.
4. Place the machine on a solid foundation-concrete, if possible. If the floor is wood, make
e it can support the machine and workbench. Brace it if necessary to prevent sagging
sur
or settling.
5. Make allowances at the back of the machine tool, at the end, and above it for later
additions, attachments, and/or accessories. Provide clearance on the left end for bar
stock to be fed through the spindle. If you are considering placing more than one machine
in an area, allow enough floor space to feed long bar stock to each machine.
Cleaning and Lubricating the Machine
Smithy machines are shipped with a protective grease coating. To remove it, spray on
or a few minutes, and wipe it off with rags. Use a brush and
t f
WD-40, let i
noncorr
t si
e kerosene or white mineral spirits to clean hard to reach places.
osiv
Give special attention to the leadscrew. Use a brush or cotton string to clean down into
the threads.
The best w
ay to clean the powerfeed gears is to remove them completely. wipe the
pulleys with a damp rag.
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Midas 1220 XL Operator’s Manual
Once it's cleaned, your Smithy is ready for lubricating. Do this carefully and thoroughly
before starting the machine. Use pressure oil can and good quality SAE No. 20 or 30
weight machine oil on the bearings and headstock.
To be thorough and complete, follow this routine:
Oiling the Headstock
1. Open the gearbox door to expose the change gears. Oil the button in the casting
behind the D gear (Figure 6.6). Then put a few drops of oil on the teeth of all the gears.
Grease the zerk on the A gearshaft.
Figure 6.6 Oil the button behind the D gear.
2. Check the sight glass under the chuck. If necessary, add oil until it is half full. The oil-
ll plug is at the back of the headstock above the motor (Figure 5.5). Be careful no to
fi
overfill it. If you have to top it with oil, pour in only an ounce at a time and wait to see
esults in the sight glass. Too much oil will make the motor lug and sling oil from
the r
behind the chuck and inside the belt box.
Oiling the Ways
un the carriage as far to the left as possible. Put a few drops of oil on the ways. Run
1. R
the carriage to the extr
cially formulated for ways.
eme right and r
epeat. You may want to use Way-lube, an oil spe-
Oiling the Carriage
tons in the cr
1. Lubricate the oi
the front of the cross-slide ways.
l but
ide table (Figur
oss-sl
e 6.7). There are two buttons on
6-5
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Uncrating and Setting Up the MI-1220 XL
Figure 6.7 Oil the buttons (circled) along the cross-feed table and cross slide.
2. Put a few drops of oil on the compound and cross-slide feedscrews.
ops of oil on the compound slides.
3. Put a f
ew dr
Oiling the Tailstock
1. Oil the buttons on top of the tailstock (Figure 6.8)
Figure 6.8 Oil the two buttons on the top of the tailstock.
Oiling the Apron
1. Put oil in the button just behind the cross-slide handwheel (Figure 6.7).
2. Put oi
l in the but
ton at the back of the cr
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Midas 1220 XL Operator’s Manual
Oiling the Leadscrew
1. Put oil in the oil buttons in the left trestle.
2. Put oil in the support for the right end of the leadscrew (figure 6.9).
Figure 6.9 Oil the support for the right end of the leadscrew.
3. Put a few drops of oil along the leadscrew and feed shaft.
Oiling the Compound
1. Put oil in the two buttons on the top.
Oiling the Mill/Drill Clutch
1. Put oil in the button on top of the clutch housing (Figure 6.10).
Figure 6.10 Oil the clutch-housing button.
To keep your machine in peak condition, lubricate it daily after removing any debris.
6-7
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Uncrating and Setting Up the MI-1220 XL
Setting up Your MI-1220 XL
The Midas 1220 XL comes with all major components assembled, but it is not ready to
use right out of the crate. Do not start the motor until you correct the positions of the
cross slide and leadscrew handwheels (Figure 5.1). We reversed these handles at our
warehouse to protect them during shipment. A drop or two of oil on the shafts will help
the handles slide on. Starting the motor with these handles in their shipping positions will
damage the machine's gear, bearings, and handles. You must also install the tailstock
handwheel, two drill-press handles, millhead lock handle and millhead height adjustment
handle.
Setting Lathe and Mill Speeds
Changing belts changes lathe speeds. The lower speeds use the two short belts. There is
only one position for the motor pulley to idler pulley belt. It goes on the smallest sheave
of the motor pulley (behind the largest sheave, Figure 6.11) and on the largest sheave of
the idler pul
smallest sheave of the idler pulley to the largest sheave of the spindle pulley (position C).
Move it in one sheave for 250 rpm (position D) and one more for 400 rpm (position E).
ley. For 160 rpm, set the idler pulley to the lathe spindle pulley belt on the
LOW HIGH
C D E
F G H
X
C 160
D 250
E 400
F 630
G 1000
H 1600
Table 6.1Setting Lathe speeds (RPM)
F
or the higher speeds, r
motor pulley to the spindle pulley. For 630 rpm (position F), run the belt from the outside
sheave (closest to the door) on the motor pulley to the largest sheave on the spindle
ve it in one sheave for 1000 rpm (position G). For 1600 rpm (position H), run
. Mo
ley
pul
rom the largest motor pulley sheave to the smallest spindle pulley sheave.
t f
i
emove the two small belts and use the single long belt from the
Set mill speeds using various combinations of the lathe belts and the belt on top of the
millhead. For 125 rpm, place the mill belt in position A and the lathe belts in position C
(Figure 6.12). For 160 rpm, place the mill belt in position B and the lathe belts in
tion C, etc.
posi
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Midas 1220 XL Operator’s Manual
C
321
A4 X B1
B4 C1
315
A3 X B1
B3 C1
630
A2 X B3
B2 C3
1250
X
A4 X B2
B
A
4
4
2
3
321
1
B4 C2
A4 X B3
B4 C3
400
500
A2 X B1
B2 C1
A3 X B2
B3 C2
800
1000
A1 X B2
B1 C2
A1 X B3
B1 C3
1600
2000
Table 6.2 Setting Mill/Drill Speeds (RPM)
Adjusting Belt Tension
To get maximum performance from your machine, keep the drive belts snug.
To adjust the tension on the mill belt, swing the roller to the front and place the belt on
the back of the roller. Loosen the nut at the bottom of the roller and slide the roller in its
shaft to the desir
ed posi
tion. Tighten the nut (Figure 5.7).
When you use only the single long belt, the spring at the bottom of the idler-pulley bracket holds the idler pulley so it does not fall onto the motor pulley. To adjust the tension on
the spring, loosen the pivot shaft (Figure 6.11) and tighten or loosen the spring as needed. Then retighten the shaft.
Figure 6.11 Adjust the spring tension on the idler-pulley bracket.
6-9
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