Work Piece Clamping Solutions
Nann Workpiece Clamping Collets - Feed Fingers
QUANTITY
Feed Fingers
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
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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.
| art.no. | D | thread G | L | max. diameter |
| 207 E | 18 | M16 x 1 L | 70 | 12 11 9 |
| 217 E | 21 | M20 x 1 L | 70 | 16 14 11 |
| 220 E | 24 | M22 x 1 L | 85 | 18 16 13 |
| 236 E | 30 | M28 x 1 L | 95 | 24 21 16 |
| 237 E | 31 | M29 x 1 L | 90 | 25 22 18 |
| 254 E | 42 | M40 x 1 L | 116 | 36 31 25 |
| 273 E | 60 | M58 x 1 L | 140 | 52 45 36 |
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Highlighted art. no. according to DIN 6344
| art.no. | D | thread G | L | max. diameter |
| 242 E | 42 | M36 x 1.5 | 120 | 30 24 20 |
| 259 E | 56 | M50 x 1.5 | 138 | 42 36 29 |
| 278 E | 75 | M68 x 1.5 | 138 | 60 52 42 |
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