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Idler Pulleys »
Sintered Bronze Bushings, Standard Needle Roller Bearings, Ball Bearings
LP pulleys are available with a variety of sintered, oil-impregnated, bronze bushings and with ball and needle roller bearings. The following tables show the standard sizes. For specials, please contact the factory. With bearings, these pulleys offer excellent wear properties and prolonged life using loads not exceeding the recommended limits (click here to see note 3). Pulleys should not be allowed to move from side to side without restraints, because the bearing might work sideways out of the bore.
Sintered Bronze Bushings
SAVA
Item |
Dimensions |
Used on Nylon
Pulley Part Nos. |
Used on Steel
Pulley Part Nos. |
| I.D. |
Length |
MP253825
MP253844
MP253850
MP253869 |
1/4 |
1/4
7/16
1/2
11/16 |
LP0220
LP0200, LP0250, LP0300
LP0338, LP0388
LP0188 |
–
OP0150, OP0200
–
– |
MP324425
MP324444
MP324450 |
5/16 |
1/4
7/16
1/2 |
LP0220
LP0200, LP0250, LP0300
LP0338, LP0388 |
–
OP0150, OP0200
– |
MP385025
MP385044
MP385050
MP385063
MP385069 |
3/8 |
1/4
7/16
1/2
5/8
11/16 |
LP0220
LP0200, LP0250, LP0300
LP0338, LP0388, LP0438
LP0256, LP0463, LP0513, LP0525
LP0188 |
–
OP0150, OP0200
–
OP0250, OP0281
– |
MP506325
MP506944
MP506350
MP506363
MP506369 |
1/2 |
1/4
7/16
1/2
5/8
11/16 |
LP0220
LP0200, LP0250, LP0300
LP0338, LP0388, LP0438
LP0256, LP0463, LP0513,LP0525
LP0188 |
–
OP0150, OP0200
–
OP0250, OP0281
– |
MP638850
MP631063 |
5/8 |
1/2
5/8 |
LP0338, LP0388, LP0438
LP0463, LP0513, LP0525 |
–
OP0250, OP0281 |
MP751050
MP751063 |
3/4 |
1/2
5/8 |
LP0338, LP0388, LP0438
LP0463, LP0513, LP0525 |
–
OP0250, OP0281 |
Standard Needle Roller Bearings
SAVA
Item |
Type |
Dimensions |
Used on Nylon
Pulley Part Nos. |
Used on Steel
Pulley Part Nos. |
| I.D. |
Length |
RB254325
RB254344 |
Unsealed
Unsealed |
1/4
1/4 |
1/4
7/16 |
LP0220
LP0200, LP0250, LP0300 |
–
OP0150, OP0200 |
| RB325044 |
Unsealed |
5/16 |
7/16 |
LP0200, LP0250, LP0300 |
OP0150, OP0200 |
RB385644
RS385644
RB385650
RB385663
RS385663 |
Unsealed
Sealed
Unsealed
Unsealed
Sealed |
3/8
3/8
3/8
3/8
3/8 |
7/16
7/16
1/2
5/8
5/8 |
LP0200, LP0250, LP0300
LP0200, LP0250, LP0300
LP0338, LP0388, LP0438
LP0256, LP0463, LP0513, LP0525
LP0256, LP0463, LP0513, LP0525 |
OP0150, OP0200
OP0150, OP0200
–
OP0250, OP0281
OP0250, OP0281 |
RB506944
RS506944
RB506950
RB506963
RS506963 |
Unsealed
Sealed
Unsealed
Unsealed
Sealed |
1/2
1/2
1/2
1/2
1/2 |
7/16
7/16
1/2
5/8
5/8 |
LP0200, LP0250, LP0300
LP0200, LP0250, LP0300
LP0338, LP0388, LP0438
LP0256, LP0463, LP0513, LP0525
LP0256, LP0463, LP0513, LP0525 |
OP0150, OP0200
OP0150, OP0200
–
OP0250, OP0281
OP0250, OP0281 |
RB638150
RB638163 |
Unsealed
Unsealed |
5/8
5/8 |
1/2
5/8 |
LP0338, LP0388, LP0438
LP0463, LP0513, LP0525 |
–
OP0250, OP0281 |
RB751050
RS751050
RB751063
RS751063 |
Unsealed
Sealed
Unsealed
Sealed |
3/4
3/4
3/4
3/4 |
1/2
1/2
5/8
5/8 |
LP0338, LP0388, LP0438
LP0338, LP0388, LP0438
LP0463, LP0513, LP0525
LP0463, LP0513, LP0525 |
–
–
OP0250, OP0281
OP0250, OP0281 |
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Ball Bearings
SAVA
Item |
Bearing
Description |
Dimensions |
Used on Nylon
Pulley Part Nos. |
Used on Steel
Pulley Part Nos. |
| I.D. |
Length |
| SP38 |
Ground and
Shielded |
.1875 |
+.0005
-.0000 |
1/4 |
LP0220 |
– |
| UP38 |
Unground and
Open |
.188 |
+.004
-.000 |
1/4 |
LP0220 |
– |
| UP48 |
Unground and
Open |
.250 |
+.004
-.000 |
1/4 |
LP0220 |
– |
| UP50E |
Unground and
Shielded |
.375 |
+.004
-.000 |
5/81 |
LP0338, LP0388
LP0438, LP0463
LP0513, LP0525 |
OP0150, OP0200
OP0250, OP0281 |
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Theoretical Load Rating on ball bearings is 53 lbs. at 600 RPM. For other speeds use the conversion factor below:
3.6 @ 50 RPM
2.7 @ 100 RPM
1.4 @ 300 RPM
.8 @ 900 RPM
.7 @ 1000 RPM
.6 @ 1200 RPM
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