Clamping Force; Admissible Speeds - Bison 32 Series Instruction Manual

2.8

clamping force

Jaw clamping force
Clamping forces in Table 7 are with the jaws lubricated according to the directions contained under item 2.7.
table 7
chuck size 80
Wrench torque
35
(Nm)
total jaw force
1000
(daN)
* relates to type 3105 chucks
2.9 admissible revolutions
Admissible revolutions of the chuck depend on many factors, such as cutting parameters, weight of the workpiece
and its balance or type of machining (interrupted or continuous turning) etc.
The max. speeds as indicated in the table below should not cause a decrease of the clamping force to the half
of its initial value. When machining in the stable conditions (machining material, tools, working conditions), the
clamping force may be reduced by up to 67% of its initial value.
This relate to the chuck equipped with standard jaws, that do not protrude beyond the outer diameter of the chuck
and the unbalance condition of the 'chuck-machining workpiece' is maintained (not exceeding 20gmm/kg). The
chuck and jaws must be in good condition. Otherwise, refer to the calculations as indicated in the PN-M-60650.
admissible revolutions for self-centering scroll chucks (table 8)
table 8
chuck
type
80 85 100 125
35**
356* 7000 7000 6300 5500 4600 4000 3500 2800 2000 1300 1000
37**
38**
- - - 3800 3200 2800 2400 1900 1400
386*
3105
32** 5000 4500 4500 400
36**
38** - - -
n - admissible revolutions
100 125
160
110 140
50 75 120
3100
1700 2400
2400*
160 200 250 315 400
n
max
n (rpm) cast iron body
max
3600 3000 2500 2000 1600 1000
- - 2000 1500 1200 800
200 250 315 400
160 180 200 280
3700 4600 5500 6500
2900* 3600* 4400* 4900*
chuck size d (mm)
500 630 710 800 915
(rpm) steel body
800 800 700
900 700 - 560 500
800 650 600 400
600 500 - 400 -
500 630 800
360 460 500
7200 8000 9000
1000 1250 1300 1400 1500 1600 1800 2000
600 500 470 440 400 380
400 350 - - -
400 300 270 250 230 220
- - - - -
1000
500
11500
340 300
- - -
190 170
- - -
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