# MasterDrive 4/B128 B Section Classical Wrapped V-Belt 128" Outside Length - MROSupply.com

***MasterDrive 4/B128 is a B section classical wrapped V-belt with a 128-inch outside length. Constructed with industrial neoprene compound and polyester tensile cord, it delivers reliable power transmission for HVAC, agricultural, and general industrial belt drives.***



## Product details:

- Catalog number: 4/B128
- SKU: 2336314
- Price: ***$150.43*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [MasterDrive](https://www.mrosupply.com/brands/masterdrive/)
- Category: 
    - [B Section](htts://www.mrosupply.com/v-belts/banded-v-belts/b-section/)
    - [Banded V-Belts](htts://www.mrosupply.com/v-belts/banded-v-belts/)
    - [V-Belts](htts://www.mrosupply.com/v-belts/)
- Unit of measure: each
- Weight: 10.000 lb
- Technicall support: contact supplier for technical support on 888-922-8767


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- Bore Type: QD Bushed
  

  
- Bushing Size: SD
  

  
- Bushing Type: QD
  

  
- Finish/Coating: Grey Painted Protective Coating
  

  
- k in: 0.3125 in
  

  
- Length Through Bore: 1.8125 in
  

  
- OD: 3.95 in
  

  
- Series: A-B QD Sheaves
  

  
- Sheave Construction: Solid
  

  
- Sheave/Pulley Type: E-1
  

  
- Type: QD Style Heavy Duty V-Belt Sheaves
  

## Alternate products to `MasterDrive 4/B128 B Section Classical Wrapped V-Belt 128" Outside Length - MROSupply.com`:
- [Timken Belts (Carlisle) RBP128-4 Super Blue Ribbon Band. Formerly sold as Carlisle. Manufactured to ISO 9001:2015 standards.](https://www.mrosupply.com/products/2018962/as-markdown/)
- [Bando 4B128 Power King 4-band banded B section classical V-belt with 131" outside length. Each rib has 21/32" top width and 7/16" depth. Chloroprene rubber with polyester tension cord. Suitable for industrial drives requiring reliable power transmission. Conforms to RMA IP-23 standards.](https://www.mrosupply.com/products/675695/as-markdown/)
- [Gates 4/B128 is a Hi-Power II PowerBand V-Belt with B section, 128" effective length, and 4 bands. Designed for industrial drives requiring multiple belts in a single banded unit to reduce whip and turnover. Features a fiber-loaded EPDM compound for oil and heat resistance.](https://www.mrosupply.com/products/1241805/as-markdown/)
- [TB Woods 4RBX128 banded V-belt with 4 ribs, BX section, 131" outside length, and cogged construction. Each rib has a 21/32" top width and 7/16" depth. Designed for industrial multiple-belt drives requiring matched power transmission.](https://www.mrosupply.com/products/832576/as-markdown/)
- [Timken Belts (Carlisle) RBX128-4 Gold-Ribbon Cog-Band. Formerly sold as Carlisle. Manufactured to ISO 9001:2015 standards.](https://www.mrosupply.com/products/2020286/as-markdown/)
- [Gates 90984128 4/BX128 Tri-Power PowerBand Belts](https://www.mrosupply.com/products/2384970/as-markdown/)
- [TB Woods 4RBP128 banded V-belt with 4 ribs, B section (21/32" top width, 7/16" depth per rib), and 131" outside length. Raw-edge cogged construction for reduced bending resistance and cooler operation on small-diameter sheaves. Designed for multi-belt drives requiring matched tension and load sharing.](https://www.mrosupply.com/products/833240/as-markdown/)
- [Jason Industrial 4/B128 is a 4-band banded classical V-belt with B section, 21/32" top width per rib, and 128" outside length. Constructed from chloroprene rubber with polyester tension cord and fabric cover, it is designed for heavy-duty industrial drives requiring multiple belt stability.](https://www.mrosupply.com/products/1987612/as-markdown/)

## Product's reviews:
- Quality product - Heavy duty. Not likely to bend or warp
- Great deal - Very good customer service, great prices and super fast shipping!!! Will buy again!!
- Masterdrive purchase - service and shipment was great
- My mistake? fixed! - I needed a 3L330 V-Belt and somehow I think either I typed 5L330 although I was using an online conversion chart to match up belt numbers which might have had a typo there. The delivery is always good from MRO. I contacted MRO by email late that night after work with my silly situation and then rather than wait for a reply I ordered the right belt number so I could get the job done. I got a reply the next morning with instructions for the return procedure then the very next day I had the right belt delivered. Then I received another two contacts from the returns agent and customer support agent both telling me not to return the wrong belt and I would be refunded the purchase amount. Outstanding helpful support and the 'fastest delivery in the west'. MRO people are the best all around. Great products and extensive choices. I am retired now after 50 years in manufacturing equipment operations and maintenance with Nashua then Kellogg's but still I love working on machines and fixing things. MRO is a great source for many things even as small as a lawn & garden V-Belt they take care of the little guy too. Great people at MRO Supply.