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- UP (Ultra Precision)
Experience superior accuracy and gripping power with Ultra Precision Collets ER40. These collets offer twice the accuracy of standard precision collets and are ideal for gripping imperial size cutters, such as 3/8". Enjoy the precision you need to get the job done right with Ultra Precision Collets ER40.
| Part # | Inside Dia | Outside Dia. | Clamping Tolerance |
| 27-42128 | 1/4" | 40.8 | 1/4" (6.35mm) |
| 27-42132 | 3/8" | 40.8 | 3/8" (9.52mm) |
| 27-42136 | 1/2" | 40.8 | 1/2" (12.7mm) |
Q: How often should these be changed?
A: Roughly every 400 - 600 working hours. This is because they lose their elasticity and do not grip evenly and precisely any more.
Q: What is the difference between standard type and ultra precision type?A: The difference is in the run out rating with ultra precision being twice as accurate as the standard type.
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