Threading Tools SSTE / SSTI Inserts
■ Shim Replacement
1
2
3
4
Shim
Shim Set Screw
Recommended Tightening Torque 1.0 to 1.5N·m
F
Remove the insert to expose the shim.
Remove the shim and mount a different shim that matches the lead edge angle.
Tighten the shim set screw. (Recommended Tightening Torque 1.0 to 1.5N·m)
Loosen the shim set screw by one to two turns.
■ Wiper Edge (Partial Profile & Full Profile)
Partial Pro le
Full Pro le
Work Material
Work Material
Finishing allowance Wiper Edge
Insert (Partial Pro le)
Insert (Full Pro le)
· Performs threading without machining thread ridges (the machined surface from the previous process is left unworked.) · Enables machining of threads with different pitch widths with the same insert · Finishing of the internal (or external) diameter is required before the threading process. · Fine burrs are easily formed on edges of ridges
· Enables machining of workpieces into shapes compliant with thread standards · Only speci c thread speci cations and pitch can be machined · In order to nish a thread with the wiper edge, a nishing allowance of 0.1mm on each side is required · Edges of ridges can be rounded off.
■ Infeed Method The modified flank infeed is recommended for the SSTE Type/SSTI Type. This infeed method, which features reduced chip curl diameters and stable chip control, can also decrease chipping on trailing edges that often occurs in radial infeed machining. (1° is recommended for the modification angle.)
● Impact of Infeed Method on Chip Shapes Modi ed Flank Infeed
Work Material: SUS316, M30 x 1.5 Cutting Conditions: v c =60mm/min Wet, 8 Passes
Radial Infeed Machining
Leading Edge
Trailing Edge
Feed Direction
Feed Direction
50mm
50mm
Large curl diameters cause unstable chip control
Reduced curl diameters ensure smooth, stable chip control (performance)
F80
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