Page 1239 - Benma | Blue book 5.0

Setting screw jacks Tel. +41 44 736 63 63 • Fax +41 44 736 63 00 • sales@brw.ch
257380 Screw jack AMF
No. 6400, with flat support and centre bore dia. 12 mm for. Self-locking trapezoid thread
spindle with end retainer made of tempered steel, lacquered.
Application:
50:
Light screw block, without bore. Diameter and carrying force adjusted to clamping iron up to 14
mm slot width.
52...100:
Medium screw block, adjusted to clamping iron from 14 mm up to 22 mm slot width. For large
heights.
140:
Heavy screw block, adjusted to clamping iron from 20 mm up to 40 mm slot width.
200:
Extra heavy screw block for support of large workpieces, adjusted to clamping iron from 20 mm
up to 40 mm slot width.
210:
Heavy screw block, adjusted to clamping iron from 20 mm up to 40 mm slot width.
280:
Extra heavy screw block for support of large workpieces, adjusted to clamping iron from 20 mm
up to 40 mm slot width.
Appropriate accessories:
257040 Forked clamp tapered AMF
257480 Atlas screw jack AMF
257560 Pads and suports AMF
* Clamping forces F1 and F2 depend on the groove width.
Order ID Size H-H1 d Ø f max.
mm mm mm kN
257380.0100 50 38...50 31 31 15
257380.0200 52 42...52 50 50 60
257380.0300 70 50...70 50 50 60
257380.0400 100 70...100 50 50 60
257380.0500 140 100...140 68 68 100
257380.0600 200 140...200 80 100 350
257380.0700 210 140...210 70 80 170
257380.0800 280 190...280 110 140 600
257400 Aluminium screw jack AMF
No. 6401, with flat support and centring hole dia. 12 mm.
Design
Lower part made of aluminium with a strength of 400N/mm2 for protecting the tables of precision
machines. The chips penetrate the aluminium part instead of the table.
Application
For straightening and gauge plates.
Appropriate accessories:
257560 Pads and suports AMF
Order ID Size H-H1 D d f max.
mm mm mm kN
257400.0100 52 42...52 50 50 30
257400.0200 70 50...70 50 50 30
257400.0300 100 70...100 50 50 30

257420 Magnetic screw jack AMF
No. 6405, with flat support and centring hole dia. 12 mm.
Design
Lower part made of aluminium with magnetic base (lesser amounts of magnetically attracted
chips), for vertical positioning. With the intermediate plate and screw blocks, the clamping heights
can be expanded.
Usable with:
257560 Pads and suports AMF
Order ID Size H-H1 D d f max.
mm mm mm kN
257420.0100 62 52...62 50 50 30
257420.0200 80 60...80 50 50 30
257420.0300 110 80...110 50 50 30

1230 Brütsch/Rüegger Tools Ltd. • Heinrich Stutz-Strasse 20 • P.O. Box • CH-8902 Urdorf • www.brw.ch