Nann Workpiece Clamping Collets - Feed Fingers

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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

 circle    |   oct    |   square

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

Highlighted art. no. according to DIN 6344

 
art.no. D thread G L

 max. diameter

 circle    |   oct    |   square

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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