CUSTOMER MESSAGE Inside Front Cover
SAFETY PRECAUTIONS 3
92-0547 Rev. 140610
Model 302 Tube Squaring Machine
GENERAL 6
SPECIFICATIONS 7
MAINTENANCE 9
OPERATION 11
CUTTING SPEEDS AND FEEDS 19
SADDLE SETS 20
TOOL BITS 21
TROUBLESHOOTING 23
ILLUSTRATED PARTS BREAKDOWN 25
TOOL BIT RESHARPENING POLICY Inside Back Cover
WARRANTY INFORMATION Inside Back Cover
Page 2
Copyright 2014
Proprietary property of TRI TOOL Inc.
No reproduction, use, or duplication of the information
shown hereon is permitted without the express written
consent of TRI TOOL Inc.
Page 3
SAFETY PRECAUTIONS
IN GENERAL
When using rotating head cutting equipment, basic safety precautions should always
be followed to reduce the risk of personal injury.
Operate this tool only in accordance with specic operating instructions.
Do not override the deadman switch on the power unit. Locking down, ob-
WARNING:
DRESS CONSIDERATIONS
structing, or in any way defeating the deadman switch on the power drive unit
may result in serious injury.
Model 302 Tube Squaring Machine
Use standard safety equipment. Hard hats, safety shoes, safety harnesses, protective clothes, and other safety devices should always be used when appropriate.
Use safety glasses. Do not operate cutting tools without eye protection.
Dress properly. Do not wear loose clothing or jewelry. They can be caught in rotat-
ing and moving parts. Avoid slippery oors or wear nonskid footwear. If you have
long hair, wear protective hair covering to contain it.
WORK AREA
Keep the work area clean. Keep the area well lit. Keep electrical cords, cables, rags,
rigging straps, and etc. clear of rotating equipment. Do not use power-cutting tools
in the presence of ammable liquids and gasses.
Keep visitors away. Do not let visitors or untrained personnel at or near operating
tools. Enforce eye protection requirements for all observers.
Do not over reach. Keep proper footing at all times.
Stay alert. Watch what you are doing. Use common sense. Do not operate tools
when you are tired.
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TRI TOOL INC.
TOOL CARE
Maintain tools with care. Keep tools in good operating condition. Sharp tool bits
perform better and safer than dull tool bits. Well maintained tools function properly
when needed.
Check for damaged parts. If a tool has malfunctioned, been dropped or hit, it must
be checked for damage. Run no-load tests and feed function checks. Do a complete visual inspection.
Electric motors. Use only with proper AC voltage power sources and observe all
normal electric shock hazard procedures.
Do not abuse power and control cords. Pulling or running over cords and cables can
result in electrical shock hazards and malfunctions. Keep control and power cords
out of all cutting uids and water.
Hydraulic drives. Observe proper procedures for electrically driven power sources.
Avoid damage to hydraulic lines. Keep quick-disconnects clean. Grit contamination
causes malfunctions.
Air tools. Check the exhaust mufer. Broken or damaged mufers can restrict air
ow or cause excessive noise. Use air motors only with a ltered, lubricated and
regulated air supply. Dirty air, low-pressure air or over pressure air will cause malfunctions, including delayed starting.
AREA EQUIPMENT
Secure work. Whenever possible use clamps, vises, chains and straps to secure
pipe.
Make sure the tool is secured; it is safer to have both hands free to operate the tool.
TOOL USE
Use the right tool and tool bit for the job. Do not use a tool, which is incorrect for the
job you are doing.
Keep the tool bits fully engaged in the tool bit holders. Loose bits are a safety
hazard.
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Model 302 Tube Squaring Machine
Disconnect power supply during setup and maintenance. Use all ‘Stop’ or Shut off’
features available when changing or adjusting tool bits, maintaining the tool, or when
the tool is not in use.
Remove adjusting keys and wrenches before applying power to the equipment. Develop a habit of checking the tool before turning it on to make sure that all keys and
wrenches have been removed.
Do not force tools. Tools and tool bits function better and safer when used at the
feed and speed rate for which they were designed.
Do not reach into rotating equipment. Do not reach into the rotating head stock to
clear chips, to make adjustments, or to check surface nish. A machine designed to
cut steel will not stop for a hand or an arm.
Handle chips with care. Chips have very sharp edges and are hot. Do not try to pull
chips apart with are hands; they are very tough.
Avoid unintentional starts. Do not carry or handle tools with your hand on the operating switches or levers. Do not lay the tool down in a manner that will start the
drive. Do not allow the tool to ip around or move when adjusting or changing tool
bits.
Store idle tools properly. Disconnect tools from the power source and store in a safe
place. Remove tool bits for safe handling of the tool.
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TRI TOOL INC.
The Model 302 Tube Squaring Tool is a bench mounted machine designed specifically to prepare tubes for autogenous welding. The 302 will face (square) .188” to
2.375” (4.8 mm to 60.3 mm) outside diameter tubing with a wall thickness up to .200”
(5.1 mm). The 302 uses an OD Saddle Clamping System for holding and rounding
the tube. The 302 accepts its own torque through the Saddle Clamping System.
The standard Saddle Clamping System requires a straight length of tube .875” (22.2
mm) long. Automatic clamping can be provided using a pneumatic clamping system.
Speed control is provided with a variable speed electric drive or a pneumatic drive
motor. Feed is provided by a lever action for excellent feed control. A microfeed system provides an accurate controlled feed alternative.
GENERAL
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SPECIFICATIONS
Model 302A with an Air Motor (P/N 01-1271)
Weight: 18.5 lbs (8.4 kg) without saddles
Power Requirements: 26 cfm at 90 PSI (12 L/s at 621 kPa)
Envelope Drawing with Air Motor
Model 302 Tube Squaring Machine
9.57"
(243.1mm)
12.80" (325.1mm)
5.20" (132.1mm)
12.00" (304.8mm)
TOOL BIT SLOTS
AIR MOTOR
CLAMP HANDLE
BASE
PLATE
8.57" (217.7mm)
CUTTER
HEAD
12.00" (304.8mm)
FEED
HANDLE
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TRI TOOL INC.
Model 302E with a 110 VAC, 60 Hz Electric Motor (P/N 01-1242)
Weight: 20.6 lbs (9.3 kg) without saddles
Power Requirements: 110 VAC, 50/60 hz, 7.0 amp
Model 302E with a 220 VAC, 50 Hz electric motor (P/N 01-1770)
Weight: 20.6 lbs (9.3 kg) without saddles
Power Requirements: 220 VAC, 50/60 hz, 4.0 amp
Envelope Drawing with Electric Motor
15.00" (381.0mm)
5.20" (132.1mm)
12.00" (304.8mm)
TOOL BIT SLOTS
ELECTRIC
MOTOR
CLAMP
HANDLE
BASE
PLATE
8.57" (217.7mm)
CUTTER HEAD
FEED
HANDLE
9.57"
(243.1mm)
12.00" (304.8mm)
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Model 302 Tube Squaring Machine
MAINTENANCE
All components should be cleaned and coated with a light lm of oil prior to use.
Use a clean, non-detergent oil, preferably SAE 10 (90 SSU) or lighter.
The air supply for the Model 302A with an air motor should include an adequate lter,
regulator and lubricator (FRL).
NOTE:
If the Model 302 is operated in the vertical position (cutting head up), turn it upside
down and remove the chips and/other debris after each bevel has been completed.
WARNING:
Bearing and gears are to be lubricated using a high string utility grease (P/N 68-
0020).
The Motor Warranty is void if damage occurs from contaminated air or lack of
lubrication.
Tool life may be severely shortened, unless chips and/or debris, that have
been deposited on the cutting head during the machining operation, are removed.
AIR MOTOR LUBRICATION
Disassembly of a power unit voids warranty, except when performed by a
WARNING:
No direct maintenance is normally required on the Air Motor.
TRI TOOL designated repair technician. (Letter of designation is required.)
However, the air supply must ow through a lter/regulator/lubricator (FRL) unit or
separate units before arriving at the air motor.
The FRL unit must be maintained as required (frequency dependent on the basic air
supply) to keep the water trap drained, lter cleaned and the lubricator oil reservoir
lled so that a drop of oil every two (2) to ve (5) seconds is owing.
If the Model 302A is to be left idle for 24 hours or more after being run on ‘wet’ air, it
is advisable to squirt oil directly into the air motor inlet and run the motor for two (2)
to three (3) seconds.
This will prevent rusting and ‘freezing’ of the rotor vanes.
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TRI TOOL INC.
Lubricant Recommendations:
The air motor requires a ‘Class 2’ lubricant, viscosity of 100 to 200 SSU at
100° F (38° C).
• TRI TOOL Inc. – Air Tool Lubricant (P/N 68-0022)
• AMOCO – American Industrial Oil No. 32
• Atlantic Richeld – Duro Oil S-150
• Chevron – A.W. Machine Oil 32
• Exxon – Nuto H32
• Shell – Tellus Oil 32
NOTE:
The bearings in either the air motor or the electric motor are sealed and do
not require any lubrication.
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Page 11
GENERAL
The handle of the motor may be rotated to another position as necessary to t into
some situations.
Loosen the cap screw in the clamp bracket and rotate the motor handle to the desired position.
Tighten the cap screw before turning the motor on.
Select the Tool Bit required to machine the tube ends square and at as required for
an autogenous weld joint.
Model 302 Tube Squaring Machine
OPERATION
WARNING:
General Guide Lines for Selecting a Tool Bit
NOTE:
The use of dull or improperly designed Tool Bits or Tool Bits not manufactured
by Tri Tool Inc. may result in poor performance and may constitute abuse of
this machine and therefore void the Tri Tool Inc. factory warranty.
Selection of the Tool Bit should be based on tubing material, the tubing size,
and how critical is it to have a near burr free end. The DURABIT 1, DURABIT
2 and DURABIT 3 Tool bits provide near burr free ends (measured burrs less
than 0.004" or 0.1mm) on most materials.
The DURABIT 1, DURABIT 2 and DURABIT 3 were developed for optimum
burr conditions on electropolished austenitic Stainless Steel tubing such as
316L and to run at higher speeds than other tube squaring tool bits. Electropolished stainless steels have a micro-thin surface on the ID, which is high in
Cr and Ni. This surface is soft, but tough and difcult to cut without a burr.
The Part Number for a DURABIT 1 is “DURBIT1”, DURABIT 2 is “DURBIT2”
and DURABIT 3 is “DURBIT3”.
For carbon steel tube with a wall thickness greater than 0.083" (2.24mm).
Contact your Tri Tool representative for Tool Bit recommendations.
M-42 Tool Bits are available for use with the exotic alloys where the high heat
resistance is required to avoid burning the cutting edge of the Tool Bit. Call
your Tri Tool representative for recommendations.
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TRI TOOL INC.
M-42 can improve the life expectancy of the Tool Bit under some conditions
but it should be noted that M-42 Tool Bits are more brittle than the M-2 Tool
Bits. Therefore, there is a much greater risk of damaging the Tool Bit when
installing the tubing in the Tube Squaring Machine. Loss of Tool Bits from
damaged edges may not offset the improved cutting life expected from M-42
tool steel.
Tool Bits made from M-42 tool steel with its high heat resistance, may provide
longer life on some exotic alloys. Be aware that the cutting speeds to obtain a
burr FREE end is slower for all tool bits other than the DURABIT Series Bits.
The cost impact of the slower running speeds may not offset the increase in
life expectancy.
Select the tool bit(s) required to machine the end conguration desired.
When performing a tube squaring operation the tool bit may be placed in any
slot.
When performing separate machining operations such as facing or beveling,
the tool bit(s) may be installed in any one of the two cutting head slots.
When performing two machining operations such as facing and beveling, the
tool bits should be installed with one in each slot.
INSTALLING A TOOL BIT INTO THE TOOL
Tool Bit Installation
Cutting Head
Cap Screws
(Hidden)
Squaring Tool Bit, Cutting Edge
Rotation
12
Cap Screws
(Hidden)
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Securing the Tool Bit
Model 302 Tube Squaring Machine
Hex Wrench
CAUTION:
Insert the Tool Bit into the slot in the Cutting Head.
CAUTION:
NOTE:
Cap Screw
Cutting Edge
Rotation
Insure that the Model 302 Tube Squaring Machine is disconnected from the
power source before installing a Tool Bit.
The cutting edge of the Tool Bit must be located on the radial centerline.
Do NOT install the Tool Bit backwards.
Position the tip of the tool bit to be just inside the inside of the tube wall. The tip
must always be Inside of the tube bore to achieve a at end. The tip location is
critical on .50" to 1.00" tube because when tip is too close to the center of the tube
the chip may roll into the tube and scratch the ID.
Tighten the cap screws to secure the tool bit(s) to the cutting head.
CUTTING PROCEDURES
DURABIT 1 Tool Bit
The DURABIT 1 is designed to run at the maximum available RPM from the
tool which makes the cutting procedure different relative to the other Tube
Facing Bits with 99-xxxx part numbers.
Visually verify that the tool bit will clear the end of the tube with the feed fully
retracted (normal return position). A tube end that is cut at an angle (not
square) can be set such that the tool bit clears the end, but when the tool bit
is rotated it will engage the tube will a very heavy cut.
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TRI TOOL INC.
Using the maximum speed available from the motor, turn the machine on and
advance the tool bit into the end.
NOTE:
NOTE:
Be careful and not risk damage to the tool bit from an excessive cut.
On interrupted or out of square ends, advances the bit slowly with light feed
pressure (torque applied to the feed handle) until a continuous cut is achieved
(the tool bit is cutting all the way around the end).
Once a full cut is achieved use moderate feed pressure to nish the cut
(either to a just achieve a quality end or to cut to a scribe line).
When the desired length is achieved, let the machine make one or two
revolutions without feeding the machine (i.e. while holding the feed handle
in a xed position). If the feed backed out before the making the nish
revolutions the end will not be square. This effect will be most noticeable on
larger diameter tubes.
Back the tool bit away from the end with the machine running.
Never stop the machine with the tool bit in the cut as this can chip the tool bit
99-xxxx Series TUBE SQUARING Tool Bits
The 99-xxxx series tool bit achieves the best end results when run at slow
speed. This is especially true with electropolished tube. Electropolished
austenitic stainless steel tube alloys are very soft and tend to “mush” away
from the cutting edge. If the tube or the tool bit get warm, this tendency is
increased. Further, the cutting speed must be kept very slow to avoid heat at
the tool bit. If the tool bit to tube interface is allowed to get hot then it is like a
dull knife to cut warm butter. The material just ows away from the bit forming
large burrs. The DURABIT Series tool bits have a unique cutting edge design
and proprietary coating, which work best at high cutting speeds and are
the most commonly recommended tool bits for tube squaring application.
However, for some applications the 99 series tool bits still nd a home and the
following cutting procedures apply.
Visually verify that the tube bit will clear the end of the tube with the feed
fully retracted (normal return position). A tube end that is cut at an angle (not
square) can be set such that the tool bit clears the end, but when the tool bit
is rotated it will engage the tube will a very heavy cut.
Turn the machine on, and using the speed control of the motor, set the RPM
between 30 and 50 then advance the tool bit into the end. Use the low end
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Page 15
Model 302 Tube Squaring Machine
of the speed range (30 RPM) for 0.50 and larger tube and the high end (50
RPM) of the range for smaller tube.
NOTE:
Be careful and not risk damage to the tool bit from an excessive cut.
On interrupted or out of square ends, advances the bit slowly with light feed
pressure (torque applied to the feed handle) until a continuous cut is achieved
(the tool bit is cutting all the way around the end). The operator must increase
the speed control position to maintain the cutting speed as the load increases.
Once a full cut is achieved use moderate feed pressure to nish the cut
(either to a just achieve a quality end or to cut to a scribe line). The operator
should strive to achieve a loose but continuous chip. The chip should be a
loose curl, not a tight spiral that looks like an ice cycle.
When the desired length is achieved, let the machine make one or two
revolutions without feeding the machine (i.e. while holding the feed handle
in a xed position). If the feed is backed out before making the nishing
revolutions the end will not be square. This effect will be most noticeable on
larger diameter tubes.
Back the tool bit away from the end with the machine running.
Never stop the machine with the tool bit in the cut as this can chip the tool bit.
Adjust the bevel tool bit radially to control the land width to the bevel relationship.
SADDLE INSTALLATION
Select the desired saddle size for the pipe or tube to be worked on.
Insert the lower saddle half into the lower front of the main housing.
Then thread the adjust knob in through the bottom of the main housing and into the
lower saddle half.
Slide the two (2) cap screws through the front of the lower saddle half and into front
of the main housing and tighten.
Place the upper saddle half into the front of the main housing.
Thread the shoulder screw into the top of the upper saddle half.
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TRI TOOL INC.
Back the adjustment screw assy out until the upper half of the saddle comes in
contact with the main housing.
MACHINING SEQUENCE
Place the pipe or tube into the saddles.
Verify a clearance of 1/8” (3 mm) between the tool bit(s) and the pipe or tube face as
held by the saddles.
Tighten the upper saddle by turning the adjustment screw assy to secure the pipe or
tube once the proper clearance has been veried.
Clamping Screw
Assembly
Upper Saddle Half
Lower Saddle Half
Cap Screws
Adjust Knob
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Page 17
POWER REQUIREMENTS
Connect the proper power supply.
Depress the motor trigger.
Trigger Location
Model 302 Tube Squaring Machine
Trigger
Control and maintain constant cutting speed.
Refer to 'Cutting Speeds and Feeds' located in this manual for cutting speeds.
Rotate the feed knob clockwise to bring the cutting head and end of the tube or pipe
closer together.
Each line on the cover represents .001” (.025 mm) of feed travel.
CAUTION:
If the tube or pipe end is not square to the tube or pipe axis, the tool bit will contact
only a small segment of the tube or pipe during each revolution.
To avoid tool bit damage, the feed rate should be very slow until the tool bit is contacting the tube or pipe continually during at least one revolution.
Continue rotating the feed knob clockwise until the end of the tube or pipe is completely machined.
The actual machining operation will begin when the tool bit contacts the tube
or pipe.
CAUTION:
Be careful not to let the tool bit(s) cut into the saddle.
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TRI TOOL INC.
Discontinue feed and allow the cutting head to rotate one (1) to three (3) revolutions
to improve the nish of the prep surface.
Rotating the Feed Knob
Feed Knob
Tube or Pipe
Rotate the feed knob counterclockwise to separate the cutting head and the tube or
pipe.
Stop the tool rotation.
Release the trigger on the motor.
Rotate the feed knob counterclockwise until the cutting head clears the tube or pipe
by at least 1/8” (3 mm) or more.
Cover
18
Loosen the upper saddle to release the tube or pipe.