Model 302 Tube Squaring Machine
92-0547 Rev. 210906
15
6. OPERATION
General Comments
Rotate the handle of the motor to another position depending on the situations, by doing the
following
1. Loosen the cap screw in the clamp bracket and rotate the motor handle to the desired
position.
2. Tighten the cap screw before turning the motor on.
Guidelines for Selecting a Tool Bit
CAUTION
CAUTION: 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.
Select the Tool Bit 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 electro-
polished austenitic Stainless Steel tubing such as 316L. They can run at higher
speeds than other tube squaring tool bits. Electro-polished stainless steels have a
micro-thin surface on the ID, which is high in Cr and Ni. This surface is soft, but tough
and difficult to cut without a burr. The Part Number for a DURABIT 1 is “DURBIT1”,
DURABIT 2 is “DURBIT2” and DURABIT 3 is “DURBIT3”.
Contact your Tri Tool representative for Tool Bit recommendations for carbon steel
tubes with a wall thickness greater than 0.083” (2.24mm).
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. M-42 can improve the life expectancy of
the Tool Bit under some conditions but M-42 Tool Bits are more brittle than the M-2
Tool Bits. There is a greater risk of damaging the M-42 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.
