Technical Drawing
Exploded View
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PWKR - Cam follower
The ZRS seals forced on the outer ring guarantee an extremely efficient protection system.
Full complement of grinded flat head cylindrical rollers.
Lubrication channels and holes in the pivot.
Tolerance of execution according to normal class, possibility of special execution according to class P5 (DIN 620).
Other important features of these bearings are:
Outer ring with double border of the rollers obtained entirely and accurately grinded to allow the roller to bear loads with axial components. The ring is usually cambered on the outer part, in order to improve working condition with heavy loads and to prevent the concentration of load onto side bands of the raceway. On request, C.R. can supply rollers with cylindrical outer surface.
Pivot with threaded shank, one guide border of rollers obtained entirely and tempered rolling raceway. On the front part, a seat for hexagon wrench or for corkscrew (on request) are foreseen.
Technical Characteristics
The main characteristic of this series of rollers is the high thickness of the outer ring, which is suitable to bear specific high pressures and the impacts that characterize the use of these bearings (ex. cam followers).
It differs from NUKR series as far as the characteristics of the seals are concerned, as they are of ZRS type (steel and rubber). Furthermore, a chamber for the lubrication grease is foreseen between the rolling raceways of the outer ring.
d h7
mm
16
18
20
20
24
24
30
30
D
mm
35
40
47
52
62
72
80
90
rmin. mm
0,6
1
1
1
1
1,1
1,1
1,1
C
mm
18
20
24
24
28
28
35
35
B
mm
52
58
66
66
80
80
100
100
B2
mm
7,8
8
9
9
11
11
15
15
g
mm
17
19
21
21
25
25
32
32
M
mm
3
3
4
4
4
4
4
4
C1
mm
0,8
0,8
0,8
0,8
1,3
1,3
1
1
B1
mm
32,5
36,5
40,5
40,5
49,5
49,5
63
63
G
mm
M16x1,5
M18x1,5
M20x1,5
M20x1,5
M24x1,5
M24x1,5
M30x1,5
M30x1,5
d2
mm
20
22
27
31
38
44
47
47
CH
mm
8
8
10
10
14
14
14
14
Cw
KN
11,6
13,2
23,2
24,2
35
38,5
56
63
Cow
KN
11,3
13,8
25,5
28
39,5
46,5
70
82
Max speed
RPM min-
6000
5000
3800
3800
2200
2200
1800
1800
Nut locking
Couple (Nm)
58
87
120
120
220
220
450
450
C.R. Rif.
PWKR 35 2RS
PWKR 40 2RS
PWKR 47 2RS
PWKR 52 2RS
PWKR 62 2RS
PWKR 72 2RS
PWKR 80 2RS
PWKR 90 2RS
Cw : Dynamic load
COW : Static load
Pressure
greaser
NIP A2x7,5
NIP A3x9,5
PWKR 35 2RS -
PWKR 62 2RS -
Adaptor for
central lubrication
AP8
AP10
AP14
PWKR 35 2RS -
PWKR 47 2RS -
PWKR 62 2RS -
1. Zrs seal ring
2. Support thrust ring
3. Pivot
4. Outer ring
5. Cylindrical rollers
6. Zrs seal ring
C.R. Special Profile
C.R. s.r.l. -
