Tri Tool 301SP Tube Squaring Machine
The Tri Tool 301SP is a saddle-mounted tube squaring machine for straight tubing and short-grip fittings before autogenous welding. It covers 0.125–1.125 inches OD (3.2–28.6 mm) with suitable saddles. Short-perch saddles are available for fittings with approximately 3/16 inch of straight gripping length.
Square tube and microfitting ends
The 301SP uses size-specific OD saddles to support the workpiece during end-facing. The short-perch arrangement is useful where a fitting leaves little straight tube for clamping. A graduated cam feed gives the operator control of tool travel, and the retracting feed helps clear the bit between cuts.
301SP specifications and saddle choice
| Specification | Listed value |
|---|---|
| Tube or fitting OD range | 0.125–1.125 in (3.2–28.6 mm), with suitable saddles |
| Maximum listed wall thickness | 0.125 in (3.2 mm) |
| Short-perch saddle grip | Approximately 0.188 in (4.8 mm); confirm the fitting and saddle |
| Standard saddle clearance planning | Allow 0.625 in (15.9 mm) of straight gripping length; verify the selected saddle |
| Axial feed travel | 0.200 in (5.1 mm) |
| Drive options | Air, corded electric or cordless; confirm the supplied motor |
| Air supply | 22 cfm at 90 psi (621 kPa) |
The manufacturer lists 0.600 inch as the machine clamping minimum and 0.625 inch for standard saddle grip. For a tight installation, use the saddle drawing and actual fitting geometry to confirm clearance. Short-perch clamping requires the appropriate saddle set.
Configure the machine for the workpiece
Provide the OD, wall thickness, material, fitting drawing and available straight length. Confirm the cutting bit and preparation method for stainless steel, carbon steel, chrome alloys, copper-nickel or aluminium. Demanding alloys require an application review.
For electropolished or high-purity tubing, specify contact surfaces, cleanliness and lubrication requirements. Check these against the supplied saddle and machine configuration. Bench stands, compatible foot controls and other production accessories are selected to suit the job.
Current listed weights differ by drive: 5.4 lb with air, 7.8 lb with corded electric and 8.0 lb with cordless power. Confirm battery, charger, guard, saddle and tool-bit inclusion in the quotation.
Technical resources and related tools
See the Tri Tool 301SP operating manual and technical specifications. For a collet-mounted straight-tube machine, compare the 301E; for additional tube sizes, review the 300STS range.
