Ryobi HBG620, HBG825A Owner's Operating Manual

OWNER’S
OPERATING MANUAL

150mm (6”) & 200mm (8”) BENCH GRINDERS

MODELS HBG620 & HBG825A

Double
Insulated

THANK YOU FOR BUYING A RYOBI BENCH GRINDER

Your new Bench Grinder has been engineered and manufactured to Ryobi's high
standard for dependability, ease of operation, and operator safety. Properly cared
for, it will give you years of rugged, trouble free performance.

CAUTION: Carefully read through this entire owner's manual before

using your new Bench Grinder.

Pay close attention to the Rules for Safe Operation, Warnings and Cautions. If you
use your Bench Grinder properly and only for what it is intended, you will enjoy
years of safe, reliable service.

Thank You again for buying Ryobi tools.

SAVE THIS MANUAL FOR FUTURE REFERENCE.

NOTE: Patent Pending.

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GENERAL SAFETY INSTRUCTIONS

1. Keep guards in place and in working order.

2. Remove adjusting keys and wrenches. Form habit of checking to see that keys and

wrenches are removed from tool before turning it on.

3. Keep work area clean. Cluttered areas and benches invite accidents.

4. Don’t use in dangerous environment. Don’t use power tools in damp or wet location,

or expose them to rain. Keep work area well lit.

5. Keep children away. All visitors should be kept at a safe distance from work area.

6. Make workshop childproof with padlocks, master switches or by removing starter keys.

7. Don’t force the tool. It will perform better and safer at the rate for which it was

designed.

8. Use right tool. Don’t force tool or attachment to do a job for which it was not designed.

9. Wear proper apparel. No loose clothing, gloves, neckties, rings, bracelets or other jew-

ellery which may get caught in moving parts. Non-slip footwear is recommended. Wear
protective hair covering to contain long hair.

10. Always use safety glasses. Also use face or dust mask if grinding operation is dusty.
Everyday eyeglasses only have impact resistant lenses. They are NOT safety glasses.

11. Secure Work. Use clamps or a vise to hold work when practical. It’s safer than using
your hand and it frees both hands to operate tool.

12. Don’t overreach. Keep proper footing and balance at all times.

13. Maintain tools with care. Keep tools sharp and clean for best and safest performance.

Follow instructions for lubricating and changing accessories.

14. Disconnect tools before servicing and when changing accessories such as grinding
wheels.

15. Reduce the risk of unintentional starting. Make sure switch is in OFF position before
plugging in.

16. Use recommended accessories. Consult the owner’s manual for recommended
accessories. The use of improper accessories may cause risk of injury to persons.

17. Never stand on tool. Serious injury could occur if the tool is tipped or if the grinding
wheel is unintentionally contacted.

18. Check damaged parts. Before further use of the tool, a guard or other part that is dam­aged should be carefully checked to determine that it will operate properly and perform
its intended function. Check for alignment of moving parts, binding of moving parts,
breakage of parts, mounting and any other conditions that may affect its operation. A
guard or other part that is damaged should be properly repaired or replaced.

19. Never leave tool running unattended. Turn power off. Don’t leave tool until it has
come to a complete stop.

Page 2

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SPECIAL SAFETY INSTRUCTIONS FOR BENCH GRINDER

1. Disconnect power supply plug before replacing wheels or covers.

2. Replace cracked wheel immediately.

3. Always use guards and eyeshields.

4. Ensure tool rests and eyeshields are properly adjusted.

5. Do not overtighten wheel nut.

6. Adjust distance between wheel and tool rest to maintain 1.6mm (1/16”) or less sepa­ration as the diameter of the wheel decreases with use.

7. Use grinding wheel suitable for speed of grinder - above 3600 RPM.

8. Ensure wheel rotate freely before switching on power.

9. Stand beside the bench grinder when switching on power.

10. After fitting new grinding wheel, leave machine running for at least one minute. If the
wheel is faulty it will break during this test period.

11. Don’t operate the grinder with the wheel guard off.

12. Don’t use the grinding wheel to cut anything.

13. Don’t use anything to overload the the grinding wheel.

14. Use a wheel dresser only to remove burrs on the grinding wheel.

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SPECIFICATIONS

Model: ......................................HBG620 ....................................HBG825A

Motor:........................................1/3HP / 250 watts ......................1/2HP/ 375 watts

No Load Speed: ........................2850 RPM ................................2850 RPM

Wheel Size: ..............................150 x 19mm wide ....................200 x 25mm wide

Wheel Bore Size: ......................12.7mm ....................................12.7mm

Net Weight: ..............................8.5 kg ........................................17 kg

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UNPACKING

Unpack the carton and check your machine to see that the following parts are included.

1. Main Body (switch and electrical cord are connected).

2. Accessories:

• One set of tool rests and necessary screws, nuts and washers.

• One set of eyeshields, spark breakers and necessary screws,
nuts and washers.

NOTE: If you find any parts missing or damaged, contact the dealer for exchange

or replacement.

Page 3

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VOLTAGE

Ensure the supply voltage is the same as the voltage stated on the nameplate.

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GROUNDING

1. In the event of a malfunction or breakdown, grounding provides a path of least resis­tance for electrical current to reduce the risk of electric shock. This tool is equipped with
an electric cord having an equipment grounding conductor and a grounded plug. The
plug must be plugged into a matching outlet that is properly installed and grounded in
accordance with all local codes and ordinances.

2. Do not modify the plug if it will not fit the outlet. If necessary, have the proper outlet
installed by a qualified electrician.

3. Check with a qualified electrician or serviceman if the grounding instructions are not
completely understood, or if in doubt as to whether the tool is properly grounded.

4. Use only 3-wire extension cords that have 3-pin plugs and 3-inlet sockets that accept
the tool’s plug.

5. Repair or replace damaged or worn cord immediately.

6. If unsure, check with manufacturer or a qualified electrician.

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TECHNICAL DATA

1. This machine uses ball bearings for longer tool life.

2. Supplied with one fine and one coarse grinding wheel.

3. Strong power for heavier duty applications.

4. Removable wheel guards for simplified wheel changes.

5. Adjustable tool rests to give you the correct working angle.

6. Accessories of eyeshields, spark breakers and tool rests are included.

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ASSEMBLY

1. Fix tool rests with screws, nuts and washers supplied.
Keep tool rests vertical to grinding wheels.
Tool rests are adjustable to maintain the correct distance from grinding wheels 1.6mm
(1/16”).

2. Assemble eyeshields and spark breakers by using bolts, washers and knurled nuts sup­plied loose.

3. Install eyeshield assemblies to wheel guards. Remove top wheel cover bolt, washer
and nut and insert spark breaker. Replace bolt, washer and nut. Adjust to desired work­ing position and tighten firmly.

NOTE: The height and angle of eyeshields can be adjusted up and down to the user’s

requirement.

Page 4

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BENCH ATTACHMENT

Fasten grinder to work bench before
operating this machine. There is a hole
on either side of the base which should
be used to secure the grinder.

2 x 10mm diameter bolts should be used to
secure the grinder to the bench or stand.

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OPERATION

1. Eyeshields Adjustment

The see-through eyeshield allows users to see operation clearly, work precisely.
Eyeshields can be adjusted up and down.

2. Tool Rest Adjustment

The appropriate adjustment of tool rests provides the correct working angle to do efficient
grinding. This adjustment can be done by regulating its related screw. Due to normal wear
of the grinding wheel, it is necessary to adjust the tool rests from time to time.

3. Changing the Grinding Wheels

To replace worn grinding wheels, the necessary steps are listed below:

A. Disconnect the power supply, disassemble outside covers left or right.
B. Remove the three screws and nuts holding the outside wheel guard.
C. Hold grinding wheel firmly. Remove the nut and flange on the shaft by using

proper tool. Left wheel nut has left hand thread. Right wheel nut has right hand thread.

D. Take off used wheel and replace with a new one.
E. Assemble the flange, nut and outside cover in reverse order. To ensure good

balance, make sure the surface between the grinding wheel and the flanges are smooth.

F. Replace the three screws and nuts holding the outside wheel guard and replace.
G. Switch on the machine and let it run for one minute idle rotation to check before

using under load.

Page 5

Bench

Attachment

holes

Eye shield

Toolrest

12V light

On-Off SwitchCoolant Tray

Opti View
Eye Shield

Wheel
Dressing
Tool

Page 6

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AUTO ON LIGHT

Your Ryobi Bench Grinder comes complete
with an Auto On Adjustable Light which
allows you to illuminate the grinding wheels
and workpiece when operating in dark areas.

The light will automatically come on when
the Grinder is switched on. When Grinder is
not in use, switch off the tool to avoid
overheating of the lamp.

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GLOBE REPLACEMENT

When the globe is worn out and will no
longer work *gently remove the bulb from
the holder by pushing in and turning anti­clockwise. Use only Ryobi genuine replace­ment part 12 volt, 21 Watt globe Part No.
HBG618/70. To replace *gently push the
globe into the insert and turn clockwise.

*IMPORTANT: Do not use force as this
could lead to the globe breaking and serious
injury.

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COOLANT TRAY

The in-built coolant storage dip tray allows
you to cool overheated workpieces. Simply
pull out the tray and half fill with appropriate
coolant. (Fig.2)

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WHEEL DRESSING TOOL

(MODELS HBG625 & HBG825)

After extensive use, the grinding wheels will
accumulate in-ground metal build up. To
clean the wheels detach the Wheel Dressing
Tool from the storage holder. (Fig.3)

Rest the Wheel Dressing Tool on the tool
rest approx. 5mm from the grinding wheel.

Switch on the grinder and wait a few sec­onds until the grinding wheel reaches full
revolution then slowly move the Dressing
Tool to gently touch against the grinding
wheel holding firmly with two fingers.
Do not use excessive pressure. (Fig.4)

CAUTION: Do not allow the grinding wheel
and Dressing Tool to touch before the grind­ing wheel has reached high speed as this
may cause the Dressing tool to be flicked
from your grasp causing serious injury.

Page 7

HOME USE WARRANTY

24 Months Home Use Warranty

Subject to the warranty conditions below, this RYOBI
tool, (hereinafter called "the product"), is warranted for
home use only by Ryobi Australia Pty. Ltd. (hereinafter
called "The Company") to be free from defects in
material or workmanship for a period of 24 months from
the date of original purchase covering both parts and
labour. Under the terms of this warranty, the repair or
replacement of any part shall be the opinion of the
Company or its authorised agent. Should service
become necessary during the warranty period, the
owner should return the product to their nearest
authorised RYOBI Service Centre. In order to obtain
warranty service, the owner must include the Sales
Docket and Warranty Certificate to confirm date of
purchase. This Product is sold by the dealer or agent as
principal and the dealer has no authority from the
Company to give any additional warranty or guarantee
on the Company's behalf except as herein contained or
herein referred to.

Warranty Conditions

This warranty only applies provided that the Product has
been used in accordance with the manufacturer's
recommendations under normal use and reasonable
care (in the opinion of the Company) and such warranty
does not cover consumable components, damage,
malfunction or failure resulting from misuse, neglect,

abuse, or used for a purpose for which it was not
designed or is not suited and no repairs, alterations or
modifications have been attempted by other than an
Authorised Service Agent. This guarantee will not apply
if the tool is damaged by accident or if repairs arise from
normal wear and tear. The Company accepts no
additional liability pursuant to this warranty for the costs
of travelling or transportation of the Product or parts to
and from the service dealer or agent - which costs are
not included in this warranty. Certain legislation,
including the Trade Practices Act, 1974 (as amended)
and other state and territorial laws give rights to the
buyer and impose liability on the seller in certain
circumstances. Nothing herein shall have the effect of
excluding, restricting or modifying any condition,
warranty, right or liability imposed, to the extent only
that such exclusion, restriction or modification would
render any term herein void.

30 Day Satisfaction Guarantee

If the owner is not completely satisfied with the
performance of the product, for quality reasons, the
Product should be returned to the Authorised RYOBI
Dealer from whom it was purchased within 30 days of
the original date of purchase for refund or exchange.

RYOBI AUSTRALIA PTY. LTD.

A.B.N. 98 002 277 509

SYDNEY: 359-361 Horsley Road, Milperra, N.S.W. 2214.

Contact during normal business hours.

Tel: [phone] - Fax: [phone] - Email: [e-mail]

Web Site: www.ryobi.com.au

RYOBI NEW ZEALAND PTY. LTD.

AUCKLAND: 503 Mt Wellington Highway, Mt Wellington, N.Z.

Tel: [phone] - Free Call: 0800 279 624 - Fax: [phone] - Email: [e-mail]

Contact during normal business hours.

BRISBANE: All enquiries Tel : [phone]

TOWNSVILLE: All enquires Tel : [phone]

MELBOURNE: 960 Stud Road, Rowville.Vic. 3178

Tel : [phone]

HOBART: All enquiries Tel : [phone]

ADELAIDE: All enquiries Tel : [phone]

PERTH: 33-35 Sorbonne Cres.,Canning Vale. W.A. 6155.

Tel : [phone]

THIS WARRANTY FORM SHOULD BE RETAINED BY THE CUSTOMER AT ALL TIMES.

For your record and to assist in establishing date of purchase (necessary for in-warranty service),

please keep your purchase docket and this form, completed with the following particulars.

PURCHASED FROM :........................................................................................................................................................

ADDRESS OF DEALER : ..................................................................................................................................................

DATE: ................................MODEL NO.: ....................................................SERIAL NO.: ................................................

Present this form with your Purchase Docket when Warranty Service is required.