Page 2948 - Benma | Blue book 5.0

Guide elements Tel. +41 44 736 63 63 • Fax +41 44 736 63 00 • sales@brw.ch
7 12430 Ball bearing guide bush with stroke limitation for slip-ft
bonding
Bush: tool steel
Hardness: 62±2 HRC
The bush is accurately positioned by means of H5 slip-fit hole. The slip-fit adhesive is used solely to
secure the bond. Advantages of slip-fit bonding:
- High accuracy and stability
- No difficulty in finding position when
changing bushings
We do not recommend press-fitting the bush since that causes unacceptable alteration to the
shape of the bush.
h= max. stroke
Cage travel = 1/2 of stroke length.
Ball cage to be ordered separately.
l = ball cage: preferred lengths
d1 l1 d2 d3 h l
mm mm mm mm mm mm
15 60 21 28 18 45
16 60 22 28 18 45
19 77 25 32 52 45
20 77 26 32 52 45
24 77 30 40 49 45
25 77 31 40 49 45
30 95 38 48 74 50
32 95 40 48 74 50
38 120 46 58 98 63
40 120 48 58 98 63
48 120 56 70 62 80
50 120 58 70 62 80
60 120 68 85 32 95
63 120 71 85 32 95
7 12420 Sintered ferrite guide bush, carbonitrided
with long-term lubrication for slip-fit bonding
DIN 9831 / ISO 9448-2
High-purity sintered ferrite, carbonitrided
The bush is accurately positioned by means of H5 slip-fit hole. The slip-fit adhesive is used solely to
secure the bond. Advantages of slip-fit bonding:
- High accuracy and stability
- No difficulty in finding position when changing bushings
We do not recommend press-fitting the bush since that causes unacceptable alteration to the
shape of the bush.
d1 l1 d3 d1 l1 d3 d1 l1 d3
mm mm mm mm mm mm mm mm mm
8 15 13.7 24 30 40 40 30 58
11 23 22 37 40 37 58
30 22 47 40 47 58
37 22 60 40 60 58
12 23 22 77 40 77 58
30 22 25 23 40 95 58
37 22 30 40 120 58
15 23 28 37 40 48 37 70
30 28 47 40 47 70
37 28 60 40 60 70
47 28 77 40 77 70
60 28 30 30 48 95 70
16 23 28 37 48 120 70
30 28 47 48 50 37 70
37 28 60 48 47 70
47 28 77 48 60 70
60 28 95 48 77 70
19 23 32 32 30 48 95 70
30 32 37 48 120 70
37 32 47 48 60 60 85
47 32 60 48 77 85
60 32 77 48 95 85
77 32 95 48 120 85
20 23 32 38 30 58 63 60 85
30 32 37 58 77 85
37 32 47 58 95 85
47 32 60 58 120 85
60 32 77 58 80 60 95.7
77 32 95 58 110 95.7
24 23 40 120 58 120 95.7

Brütsch/Rüegger Tools Ltd. • Heinrich Stutz-Strasse 20 • P.O. Box • CH-8902 Urdorf • www.brw.ch 2937