SY 20 WF

Pillow block ball bearing unit with extended 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 an extended inner ring on both sides 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
34.2 mm
Width of inner ring
B1
43.7 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
26.6 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

Properties

Housing type Pillow block
Number of bolt holes for fasteners 2
Fastening bolt hole type Plain
Retaining feature, inner ring Eccentric collar
Bore type Cylindrical
Rubber seating ring Without
Material, housing Cast iron
Material, bearing Bearing steel
Coating Without
Sealing, bearing Seal and flinger on both sides
Sealing type Contact, standard
Sealing, unit Optional end cover
Lubricant Grease
Relubrication hole With
Grease fitting With
Compliance with standard
ISO
Purpose specific
For material handling applications, For air handling applications
Material, housing
Cast iron
Sealing, bearing
Seal and flinger on both sides
Sealing type, bearing
Contact, standard
Sealing, unit
Optional end cover
Coating
Without

Logistics

Product net weight 0.608 kg
eClass code 23-05-08-02
UNSPSC code 31171536

Component

Pillow block housing for insert bearings, cast iron, ISO standards SY 504 M
Insert bearing with an eccentric locking collar and extended inner ring YEL 204-2F

Recommended product

End cover for bearing units ECY 204

(20X127X42.6) (SY20WF)

Additional information

Weight 0.608 kg
Size (mm)

Colour

You may also like…