SY 20 FM
Pillow block ball bearing unit with narrow inner ring and eccentric locking collar, cast iron, ISO standards
Pillow (plummer) block ball bearing units consist of an insert bearing mounted in a cast iron housing that can be bolted to a support surface.
This variant is intended for use in applications where the direction of rotation is constant. It has a narrow inner ring and is locked onto the shaft by an eccentric locking collar, making it easy to mount.
- Strong
- Ready to mount
- Lubricated and sealed bearing
- Designed for rotation in one direction
- Accommodate static initial misalignment
Dimensions
| d |
20 mm
|
Bore diameter |
| d1 |
≈28.2 mm
|
Shoulder diameter of inner ring |
| d2 |
32.4 mm
|
Outside diameter of locking ring |
| A |
32 mm
|
Base width |
| A1 |
21 mm
|
Top width |
| A5 |
20.5 mm
|
Standout of end cover |
| B |
21 mm
|
Width of inner ring |
| B1 |
30.5 mm
|
Overall bearing width |
| B4 |
4.75 mm
|
Distance from locking device side face to thread centre |
| H |
33.3 mm
|
Height of spherical seat centre |
| H1 |
14 mm
|
Foot height |
| H2 |
64.5 mm
|
Overall height |
| J |
97 mm
|
Distance between attachment bolts |
| J |
max.106 mm
|
Distance between attachment bolts |
| J |
min.88 mm
|
Distance between attachment bolts |
| L |
127 mm
|
Overall length |
| N |
11.5 mm
|
Diameter of attachment bolt hole |
| N1 |
20.5 mm
|
Length of attachment bolt hole |
| s1 |
23.5 mm
|
Distance from locking device side face to raceway centre |
THREADED HOLE
| RG |
1/4-28 UNF
|
Housing thread for the grease fitting |
| R1 |
2 mm
|
Axial position of the housing thread |
| Rα |
45 °
|
Angular position of the housing thread |
GREASE FITTING
| DN |
6.5 mm
|
Diameter of head sphere of grease fitting |
| SWN |
7 mm
|
Hexagonal key size for the grease fitting |
| GN |
1/4-28 SAE-LT
|
Thread of grease fitting |
DOWEL PINS
| J6 |
118 mm
|
Distance of dowel pins |
| J7 |
11.5 mm
|
Axial offset of dowel pins |
| N4 |
2 mm
|
Recommended diameter for dowel pins |
Calculation data
| Basic dynamic load rating |
C |
12.7 kN
|
| Basic static load rating |
C0 |
6.55 kN
|
| Fatigue load limit |
Pu |
0.28 kN
|
| Limiting speed |
|
8 500 r/min
|
|
|
Limiting speed with shaft tolerance h6
|
Mounting information
| Set screw |
G2 |
M6x0.75
|
| Hexagonal key size for set screw |
|
3 mm
|
| Recommended tightening torque for set screw |
|
4 N·m
|
| Recommended diameter for attachment bolts, mm |
G |
10 mm
|
| Recommended diameter for attachment bolts, inch |
G |
0.375 in
|
