SY 25 LF

Pillow block ball bearing unit with extended inner ring and SKF ConCentra locking, 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.

It has an inner ring extended on both sides and is locked onto the shaft by a SKF ConCentra locking, creating a true concentric tight fit, and setting the correct internal clearance within the bearing, and making it easy to mount.

  • Strong
  • Ready to mount
  • Lubricated and sealed bearing
  • Quick locking onto the shaft
  • Cost-effective

Dimensions

d
25 mm
Bore diameter
d1
33.74 mm
Shoulder diameter of inner ring
d2
41.7 mm
Outside diameter of locking ring
A
36 mm
Base width
A1
22 mm
Top width
A5
20.5 mm
Standout of end cover
B
24 mm
Width of inner ring
B1
33.2 mm
Overall bearing width
H
36.5 mm
Height of spherical seat centre
H1
16 mm
Foot height
H2
70 mm
Overall height
J
102 mm
Distance between attachment bolts
J
max.110 mm
Distance between attachment bolts
J
min.94 mm
Distance between attachment bolts
L
130 mm
Overall length
N
11.5 mm
Diameter of attachment bolt hole
N1
19.5 mm
Length of attachment bolt hole
s1
21.2 mm
Distance from locking device side face to raceway centre
Values specified for B1 and s1 are approximate and before the set screw is tightened (sleeve and inner ring bore at starting position).
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
120 mm
Distance of dowel pins
J7
13 mm
Axial offset of dowel pins
N4
4 mm
Recommended diameter for dowel pins

Calculation data

Basic dynamic load rating C
14 kN
Basic static load rating C0
7.8 kN
Fatigue load limit Pu
0.335 kN
Limiting speed
7 000 r/min

Mounting information

Set screw G2
M5
Hexagonal key size for set screw
2.54 mm
Recommended tightening torque for set screw
4.2 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 SKF ConCentra
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 0.692 kg
eClass code 23-05-08-02
UNSPSC code 31171536

Component

Pillow block housing for insert bearings, cast iron, ISO standards SY 505 M
Insert bearing with SKF ConCentra locking YSP 205 SB-2F

Recommended product

End cover for bearing units ECY 205

(25X130X37.5) (SY25LF)

Additional information

Weight 0.692 kg
Size (mm)

Colour

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