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Plain Bore Sheaves

Plain bore sheaves are critical components in mechanical power transmission systems, transmitting rotational motion and torque between shafts using flexible belts. Featuring a simple, cylindrical bore, these sheaves allow for easy customization and are used in various industrial applications, such as conveyor systems, pumps, and fans. The appropriate plain bore sheave selection depends on factors like speed ratio, belt type, load capacity, and operating environment.
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#253063
AK104 P/B
Martin AK104 P/B plain bore FHP (Fractional Horsepower) sheave. Cast iron V-belt sheave with 10.250" outside diameter. For light-duty drives using A/4L or B/5L section belts. Requires separate bushing or direct shaft mounting.
Brand Martin Sprocket
Model AK104 P/B
$81.91 Each
Free shipping
#253072
AK109 P/B
Martin AK109 P/B cast iron V-belt sheave with 10.75" outside diameter and plain bore. Suitable for fractional horsepower (FHP) drives. Weight: 6.1 lbs.
Brand Martin Sprocket
Model AK109 P/B
$87.81 Each
Free shipping
#253108
AK154 P/B
Martin AK154 P/B FHP (Fractional Horsepower) sheave, plain bore, cast iron construction, 15.250" outside diameter. For light-duty V-belt drives. Weight: 9.7 lbs.
Brand Martin Sprocket
Model AK154 P/B
$154.65 Each
Free Shipping orders over $100
#253183
AK34 P/B
Martin AK34 P/B FHP (Fractional Horsepower) sheave is a plain bore V-belt sheave with a 3.450" outside diameter, constructed from steel. This sheave is designed for light-duty power transmission applications.
Brand Martin Sprocket
Model AK34 P/B
$24.24 Each
Free shipping
#253204
AK41 P/B
Martin AK41 P/B plain bore FHP (Fractional Horsepower) sheave. Cast iron construction, 3.950" outside diameter. For A/4L section V-belts. Used in light-duty power transmission applications.
Brand Martin Sprocket
Model AK41 P/B
$34.86 Each
Free shipping
#253213
AK44 P/B
Martin AK44 P/B FHP (Fractional Horsepower) sheave, plain bore design. Cast iron construction with 4.250" outside diameter. For use with A/4L section V-belts in light-duty power transmission applications.
Brand Martin Sprocket
Model AK44 P/B
$35.88 Each
Free shipping
#253222
AK46 P/B
Martin AK46 P/B plain bore FHP (Fractional Horsepower) sheave. Cast iron V-belt sheave with 4.450" outside diameter. For use with A/4L section V-belts. Plain bore design requires machining to final bore size and keyway.
Brand Martin Sprocket
Model AK46 P/B
$37.42 Each
Free shipping
#253231
AK49 P/B
Martin AK49 P/B FHP (Fractional Horsepower) sheave, plain bore design. Cast iron construction with 4.750" outside diameter. For light-duty V-belt drives requiring a fixed bore sheave.
Brand Martin Sprocket
Model AK49 P/B
$37.78 Each
Free shipping
#253248
AK54 P/B
Martin AK54 P/B FHP (Fractional Horsepower) sheave, plain bore design. Cast iron construction with 5.250" outside diameter. For use with A/4L section V-belts in light-duty power transmission applications.
Brand Martin Sprocket
Model AK54 P/B
$40.59 Each
Free shipping
#253304
AK69 P/B
Martin AK69 P/B FHP (Fractional Horsepower) sheave, plain bore V-belt sheave. Cast iron construction, 6.75" outside diameter. For light-duty power transmission drives.
Brand Martin Sprocket
Model AK69 P/B
$54.04 Each
Free shipping
#253317
AK74 P/B
Martin AK74 P/B FHP (Fractional Horsepower) sheave is a plain bore cast iron V-belt sheave with 7.250" outside diameter. Weighs 4.5 lbs. For light-duty power transmission drives.
Brand Martin Sprocket
Model AK74 P/B
$56.49 Each
Free shipping
#253328
AK79 P/B
Martin AK79 P/B fractional horsepower (FHP) V-belt sheave, plain bore design. Cast iron construction, 7.750" outside diameter. For light-duty power transmission applications.
Brand Martin Sprocket
Model AK79 P/B
$64.57 Each
Free shipping
#253334
AK81 P/B
Martin AK81 P/B cast iron V-belt sheave with 7.95" outside diameter and plain bore. FHP (Fractional Horsepower) sheave for light-duty power transmission drives.
Brand Martin Sprocket
Model AK81 P/B
$66.39 Each
Free shipping
#253357
AK94 P/B
Martin AK94 P/B cast iron V-belt sheave, 9.250" outside diameter, plain bore. Fractional horsepower (FHP) sheave for light-duty drives. Cast iron construction for durability.
Brand Martin Sprocket
Model AK94 P/B
$75.19 Each
Free shipping
#253372
BK100 P/B
Martin BK100 P/B FHP (Fractional Horsepower) sheave is a plain bore cast iron V-belt sheave with 9.75" outside diameter. Suitable for light-duty power transmission applications requiring a simple, economical sheave design.
Brand Martin Sprocket
Model BK100 P/B
$88.45 Each
Free shipping
#253382
BK105 P/B
Martin BK105 P/B plain bore V-belt sheave. Cast iron construction, 10.250" outside diameter, 6.1 lb weight. For fractional horsepower drives.
Brand Martin Sprocket
Model BK105 P/B
$96.81 Each
Free shipping
#253387
BK110 P/B
Martin BK110 P/B FHP (Fractional Horsepower) sheave is a plain bore cast iron V-belt sheave with a 10.75" outside diameter. This sheave is designed for light-duty power transmission applications and requires a separate bushing for shaft mounting.
Brand Martin Sprocket
Model BK110 P/B
$101.70 Each
Free Shipping orders over $100
#253395
BK115 P/B
Martin BK115 P/B plain bore V-belt sheave. Cast iron construction, 11.250" outside diameter. For fractional horsepower (FHP) drives. Requires separate bushing for shaft mounting.
Brand Martin Sprocket
Model BK115 P/B
$104.26 Each
Free Shipping orders over $100
#253400
BK120 P/B
Martin BK120 P/B cast iron V-belt sheave for fractional horsepower drives. Plain bore design for direct mounting to shaft. 11.75" outside diameter, 7.4 lb weight. Suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model BK120 P/B
$108.61 Each
Free Shipping orders over $100
#253422
BK160 P/B
Martin BK160 P/B plain bore V-belt sheave for fractional horsepower drives. Cast iron construction, 15.750" outside diameter, 10 lb weight. Suitable for light-duty belt drive applications.
Brand Martin Sprocket
Model BK160 P/B
$189.61 Each
Free Shipping orders over $100
#253429
BK190 P/B
Martin BK190 P/B fractional horsepower (FHP) V-belt sheave, plain bore design. Cast iron construction with 18.75" outside diameter. For use with B/5L section V-belts. Weight: 11.8 lbs.
Brand Martin Sprocket
Model BK190 P/B
$218.31 Each
Free Shipping orders over $100
#253481
BK34 P/B
Martin BK34 P/B plain bore V-belt sheave for fractional horsepower drives. Cast iron construction, 3.550" outside diameter. Suitable for B/5L section belts. Plain bore requires machining to final size.
Brand Martin Sprocket
Model BK34 P/B
$32.88 Each
Free shipping
#253489
BK36 P/B
Martin BK36 P/B fractional horsepower (FHP) V-belt sheave, plain bore design. Cast iron construction with 3.750" outside diameter. For light-duty drives requiring a fixed bore sheave without bushing.
Brand Martin Sprocket
Model BK36 P/B
$35.88 Each
Free shipping
#253497
BK40 P/B
Martin BK40 P/B cast iron V-belt sheave with 3.950" outside diameter and plain bore. Fractional horsepower (FHP) sheave for light-duty belt drive applications. Weight: 1.8 lbs.
Brand Martin Sprocket
Model BK40 P/B
$37.42 Each
Free shipping
#253513
BK46 P/B
Martin BK46 P/B fractional horsepower (FHP) V-belt sheave. Cast iron construction with plain bore. 4.35" outside diameter. For light-duty drives requiring a fixed bore sheave without a bushing.
Brand Martin Sprocket
Model BK46 P/B
$41.32 Each
Free shipping
#253523
BK48 P/B
Martin BK48 P/B plain bore V-belt sheave for fractional horsepower drives. Cast iron construction, 4.550" outside diameter. Suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model BK48 P/B
$41.32 Each
Free shipping
#253563
BK60 P/B
Martin BK60 P/B fractional horsepower (FHP) V-belt sheave. Cast iron construction with plain bore for direct mounting. 5.750" outside diameter. For light-duty power transmission drives.
Brand Martin Sprocket
Model BK60 P/B
$47.77 Each
Free shipping
#253572
BK62 P/B
Martin BK62 P/B fractional horsepower (FHP) V-belt sheave with plain bore. Cast iron construction, 5.95" outside diameter, 3.4 lb weight. For light-duty power transmission drives requiring direct shaft mounting without a bushing.
Brand Martin Sprocket
Model BK62 P/B
$48.14 Each
Free shipping
#253582
BK65 P/B
Martin BK65 P/B plain bore V-belt sheave for fractional horsepower (FHP) drives. Cast iron construction with 6.250" outside diameter. Designed for B/5L section V-belts. Plain bore configuration for direct shaft mounting with keyway and set screws.
Brand Martin Sprocket
Model BK65 P/B
$53.95 Each
Free shipping
#253606
BK72 P/B
Martin BK72 P/B fractional horsepower (FHP) V-belt sheave with plain bore. Cast iron construction, 6.95" outside diameter, 4.6 lb weight. For light-duty drives with A or 4L section belts.
Brand Martin Sprocket
Model BK72 P/B
$66.20 Each
Free shipping
#253619
BK77 P/B
Martin BK77 P/B cast iron V-belt sheave with 7.450" outside diameter and plain bore. Fractional horsepower (FHP) sheave for light-duty drives. Weight: 4.7 lbs.
Brand Martin Sprocket
Model BK77 P/B
$68.01 Each
Free shipping
#253626
BK80 P/B
Martin BK80 P/B cast iron V-belt sheave with 7.750" outside diameter and plain bore. This fractional horsepower (FHP) sheave is designed for light-duty belt drive applications.
Brand Martin Sprocket
Model BK80 P/B
$69.11 Each
Free shipping
#253645
BK90 P/B
Martin BK90 P/B plain bore V-belt sheave for fractional horsepower (FHP) drives. Cast iron construction, 8.75" outside diameter, 5.4 lb weight. Requires machining to final bore size and keyway.
Brand Martin Sprocket
Model BK90 P/B
$80.09 Each
Free shipping
#253655
BK95 P/B
Martin BK95 P/B FHP (Fractional Horsepower) sheave, plain bore design. Cast iron construction, 9.250" outside diameter. For use with A/4L or B/5L section V-belts. Weight: 5.7 lbs.
Brand Martin Sprocket
Model BK95 P/B
$85.54 Each
Free shipping
#254285
2AK134 P/B
Martin 2AK134 P/B FHP (Fractional Horsepower) sheave is a 2-groove A-section (4L) V-belt sheave with 13.250" outside diameter, cast iron construction, and plain bore. Suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model 2AK134 P/B
$202.05 Each
Free Shipping orders over $100
#254293
2AK154 P/B
Martin 2AK154 P/B is a 2-groove A-section (4L) V-belt sheave with a 15.25" outside diameter, plain bore design, and cast iron construction. This fractional horsepower (FHP) sheave is suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model 2AK154 P/B
$246.09 Each
Free Shipping orders over $100
#254361
2AK39 P/B
Martin 2AK39 P/B FHP (Fractional Horsepower) sheave is a plain bore cast iron V-belt sheave with 3.75" outside diameter. Designed for light-duty power transmission applications requiring a fixed bore.
Brand Martin Sprocket
Model 2AK39 P/B
$66.11 Each
Free shipping
#254368
2AK41 P/B
Martin 2AK41 P/B plain bore FHP (Fractional Horsepower) sheave. Cast iron construction, 3.950" outside diameter. For light-duty V-belt drives requiring a fixed bore sheave.
Brand Martin Sprocket
Model 2AK41 P/B
$73.47 Each
Free shipping
#254375
2AK44 P/B
Martin 2AK44 P/B FHP (Fractional Horsepower) sheave, plain bore cast iron V-belt sheave with 4.250" outside diameter. Weighs 3.3 lbs. For light-duty power transmission drives.
Brand Martin Sprocket
Model 2AK44 P/B
$75.65 Each
Free shipping
#254388
2AK49 P/B
Martin 2AK49 P/B FHP (Fractional Horsepower) sheave is a plain bore cast iron V-belt sheave with 4.750" outside diameter. Used in light-duty power transmission drives requiring a fixed bore sheave.
Brand Martin Sprocket
Model 2AK49 P/B
$80.82 Each
Free shipping
#254395
2AK51 P/B
Martin 2AK51 P/B FHP (Fractional Horsepower) sheave is a plain bore V-belt sheave with 4.950" outside diameter, cast iron construction. Suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model 2AK51 P/B
$82.64 Each
Free shipping
#254429
2AK64 P/B
Martin 2AK64 P/B Fractional Horsepower (FHP) sheave is a plain bore V-belt sheave with 6.250" outside diameter, cast iron construction. For light-duty power transmission drives requiring a finished bore.
Brand Martin Sprocket
Model 2AK64 P/B
$99.16 Each
Free shipping
#254445
2AK84 P/B
Martin 2AK84 P/B FHP sheave is a 2-groove A/4L section V-belt sheave with 8.25" outside diameter, cast iron construction, and plain bore. Suitable for fractional horsepower drives.
Brand Martin Sprocket
Model 2AK84 P/B
$123.50 Each
Free Shipping orders over $100
#254453
2AK94 P/B
Martin 2AK94 P/B FHP (Fractional Horsepower) sheave is a 2-groove A/4L section V-belt sheave with 9.25" outside diameter, plain bore design for direct shaft mounting. Cast iron construction provides durability for fractional HP drive applications.
Brand Martin Sprocket
Model 2AK94 P/B
$134.31 Each
Free Shipping orders over $100
#254462
2BK100 P/B
Martin 2BK100 P/B FHP sheave is a plain bore V-belt sheave with 2 grooves for B-section (5L) belts. Cast iron construction, 9.75" outside diameter. For fractional horsepower drives. Requires separate bushing or direct shaft mounting.
Brand Martin Sprocket
Model 2BK100 P/B
$161.38 Each
Free Shipping orders over $100
#254469
2BK110 P/B
Martin 2BK110 P/B fractional horsepower (FHP) V-belt sheave. 2-groove B-section (5L) cast iron sheave with 10.75" outside diameter, plain bore. For light-duty drives requiring a finished bore sheave.
Brand Martin Sprocket
Model 2BK110 P/B
$171.36 Each
Free Shipping orders over $100
#254474
2BK120 P/B
Martin 2BK120 P/B is a 2-groove B-section (5L) V-belt sheave with 12.0" pitch diameter, 11.75" outside diameter, and plain bore. Cast iron construction for fractional horsepower (FHP) drives. Suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model 2BK120 P/B
$185.62 Each
Free Shipping orders over $100
#254479
2BK130 P/B
Martin 2BK130 P/B is a fractional horsepower (FHP) V-belt sheave with 2 grooves for B-section (5L) belts, 13.0" outside diameter, plain bore design in cast iron construction. Suitable for light-duty power transmission drives.
Brand Martin Sprocket
Model 2BK130 P/B
$208.50 Each
Free Shipping orders over $100
#254489
2BK160 P/B
Martin 2BK160 P/B fractional horsepower (FHP) V-belt sheave. 2-groove B-section (5L) cast iron sheave with 15.75" outside diameter, plain bore design for direct mounting to shaft. Suitable for light-duty power transmission applications.
Brand Martin Sprocket
Model 2BK160 P/B
$260.62 Each
Free Shipping orders over $100
#254494
2BK190 P/B
Martin 2BK190 P/B is a 2-groove B-section V-belt sheave with 18.75" outside diameter and plain bore. Cast iron construction for fractional horsepower (FHP) drives. Weighs 23.6 lbs.
Brand Martin Sprocket
Model 2BK190 P/B
$334.36 Each
Free Shipping orders over $100
#254528
2BK32 P/B
Martin 2BK32 P/B FHP (Fractional Horsepower) sheave is a plain bore V-belt sheave with 2 grooves for B-section (5L) belts. Features a 3.35" outside diameter, steel construction, and plain bore for direct mounting. Weighs 2.99 lbs.
Brand Martin Sprocket
Model 2BK32 P/B
$65.47 Each
Free shipping
#254534
2BK34 P/B
Martin 2BK34 P/B Fractional Horsepower (FHP) sheave, plain bore cast iron V-belt sheave with 3.550" outside diameter. Weighs 3.35 lbs. For light-duty belt drive applications.
Brand Martin Sprocket
Model 2BK34 P/B
$68.38 Each
Free shipping
#254541
2BK36 P/B
Martin 2BK36 P/B is a 2-groove B-section (5L) V-belt sheave with 3.75" outside diameter, plain bore for fractional horsepower (FHP) drives. Cast iron construction for durability. Direct replacement for Browning, Dodge, and TB Woods B-section sheaves.
Brand Martin Sprocket
Model 2BK36 P/B
$70.20 Each
Free shipping
#254548
2BK40 P/B
Martin 2BK40 P/B is a 2-groove B-section (5L) V-belt sheave with 4.0" outside diameter, plain bore for direct shaft mounting. Cast iron construction for durability in fractional horsepower (FHP) drives. Weighs 3.47 lbs.
Brand Martin Sprocket
Model 2BK40 P/B
$73.47 Each
Free shipping
#254555
2BK45 P/B
Martin 2BK45 P/B is a 2-groove B-section (5L) V-belt sheave with 4.25" outside diameter, plain bore construction, and cast iron material. Suitable for fractional horsepower (FHP) drives and light-duty power transmission applications.
Brand Martin Sprocket
Model 2BK45 P/B
$79.09 Each
Free shipping
#254571
2BK52 P/B
Martin 2BK52 P/B is a Fractional Horsepower (FHP) V-belt sheave with a plain bore. Made of cast iron with a 4.95" outside diameter. This bored-to-size sheave is designed for light-duty power transmission applications.
Brand Martin Sprocket
Model 2BK52 P/B
$87.09 Each
Free shipping
#254581
2BK57 P/B
Martin 2BK57 P/B FHP sheave is a 2-groove B-section (5L) V-belt sheave with 5.450" outside diameter, plain bore, and cast iron construction. Suitable for fractional horsepower drives.
Brand Martin Sprocket
Model 2BK57 P/B
$94.26 Each
Free shipping
#254586
2BK60 P/B
Martin 2BK60 P/B is a Fractional Horsepower (FHP) V-belt sheave with plain bore. Features 2 grooves for B-section (5L) belts, 6.0" outside diameter, and cast iron construction. Requires separate bushing for shaft mounting.
Brand Martin Sprocket
Model 2BK60 P/B
$98.43 Each
Free shipping
#254608
2BK70 P/B
Martin 2BK70 P/B fractional horsepower (FHP) V-belt sheave. 2 grooves for B-section (5L) belts, 6.75" outside diameter, plain bore cast iron construction. For light-duty power transmission drives requiring direct shaft mounting without a bushing.
Brand Martin Sprocket
Model 2BK70 P/B
$124.96 Each
Free Shipping orders over $100
#254617
2BK80 P/B
Martin 2BK80 P/B FHP sheave is a 2-groove B/5L section V-belt sheave with 7.75" OD, cast iron construction, and plain bore. Suitable for fractional horsepower drives in light-duty power transmission applications.
Brand Martin Sprocket
Model 2BK80 P/B
$132.68 Each
Free Shipping orders over $100