Collet & Guide Bush Accuracy

Reference TIR accuracy data for main-spindle collets, sub-spindle collets and guide bushes with round, hexagon and square bore configurations.

Round Bore Accuracy Data (mm)

Bore Dia. (Φd)	E	Main Spindle TIR	Sub Spindle TIR	Guide Bush TIR
1.0–3.0	5.0–9.0	0.008	0.005	0.005
3.01–10.0	10.0–30.0	0.008	0.005	0.005
10.01–24.0	31.0–50.0	0.012	0.005	0.008
24.01–30.0	50.0–70.0	0.017	0.005	0.010
>30	>80.0	0.020	0.005	0.020

Hexagon & Square Bore Accuracy Data (mm)

H/S Size	E	Collet	Guide Bush
1.0~3.0	5.0~9.0	0.020	0.015
3.01~10.0	10.0~30.0	0.020	0.015
10.01~24.0	31.0~50.0	0.020	0.015
24.01~30.0	50.0~70.0	0.020	0.015
>30	>80.0	0.020	0.015

Note:

TIR values are for reference only and may vary depending on bore size,
bore shape, material, and special requirements.
H/S = Hexagon / Square size
E = measuring distance from the collet face to the front end of the test bar.
Please confirm final tolerance requirements before ordering.