Feed fingers
feed fingers
art. no. | D | thread G | L | max. diameter | ||
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207 E | 18 | M 16 x 1 L | 70 | 12 | 11 | 9 |
217 E | 21 | M 20 x 1 L | 70 | 16 | 14 | 11 |
220 E | 24 | M 22 x 1 L | 85 | 18 | 16 | 13 |
236 E | 30 | M 28 x 1 L | 95 | 24 | 21 | 16 |
237 E | 31 | M 29 x 1 L | 90 | 25 | 22 | 18 |
254E | 42 | M 40 x 1 L | 116 | 36 | 31 | 25 |
273 E | 60 | M 58 x 1 L | 140 | 52 | 45 | 36 |
Highlighted art. no. according to DIN 6344 |
external feed fingers
art. no. | D | thread G | L | max. diameter | ||
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242 E | 42 | M 36 x 1,5 | 120 | 30 | 24 | 20 |
259 E | 56 | M 50 x 1,5 | 138 | 42 | 36 | 29 |
278 E | 75 | M 68 x 1,5 | 138 | 60 | 52 | 42 |
Use:
- as feed fingers for feeding forward workpiece bars in automatic lathes
- as pick-up collets for moving up workpiece bars on NC lathes for repositioning of workpieces
Bore patterns:
- smooth
- on request with round grooves
Hardness:
Feed fingers are made from special spring steel. The front component with the clamping bore has a hardness of approx. HRc 60 – where this is not prevented by the partial tempering. The thread and spring areas are hardened to spring temper.
Feed force:
Feed fingers are supplied sprung together so that, when the dimensions are nominal, they pretension the workpiece rods or workpieces.
The feed force table below gives the reference values. A hardened ground test mandrel with a tolerance of h7 must be used for checking.
Feed fingers with increased feed force can be made for an extra charge.