4B Gripbelt Sheaves (4-Groove Cast Iron Split Taper Pulleys)

4B series pulleys are manufactured for A, AX, AA, 4L, B, BX, BB, and 5L v-belts, ranging from 5.75″ to 38.35″ in diameter. Depending on the pulley size, they are made to use with R1 taper bushings or Q1 taper bushings, which we also stock. Most of our four-groove 4B split taper bushed pulleys are manufactured from a high-strength grade 35 cast iron, are phosphate-coated, and are painted for anti-corrosion. All of them are balanced at the factory for smooth machinery operation.

Description

4B Gripbelt Sheaves (4-Groove Cast Iron Split Taper Pulleys)

Our 4B series four-groove Gripbelt sheaves are engineered for reliable, heavy-duty industrial power transmission. Designed to operate efficiently with classical A, AX, AA, 4L and B, BX, BB, 5L V-belts, these robust cast iron sheaves feature outside diameters ranging from 5.75″ to 38.35″. Depending on the sheave size, they are precision-machined for compatibility with industry-standard Q1 or R1 split taper bushings, ensuring secure shaft clamping, smooth concentricity, and convenient maintenance.

4B Gripbelt Sheaves Technical Drawing and Dimensions

Key Features & Engineering Advantages

  • Grade 35 High-Strength Cast Iron: Cast from heavy-duty gray iron to handle high shock loads, severe mechanical torque, and continuous operational stress.
  • Corrosion Protection: Coated with a protective phosphate treatment and anti-corrosion paint to resist rust and environmental wear.
  • Dynamic Factory Balancing: Precision-balanced at the factory to ensure smooth running, minimize machine vibration, and extend bearing service life.
  • Versatile Bushing Mounting: Compatible with Q1 and R1 split taper bushings, allowing easy installation, positive shaft lock, and versatile bore size adaptability.

4B Style Pulley Size Chart

Size Bushing Type Pitch Diameter (4L/A) Pitch Diameter (5L/B) Outside Diameter Type (O.L.) (L) (P) (C) (H) (F) (G) (X) (E) Pulley Weight (LBS)
4B54Q Q1 5.0″ 5.4″ 5.75″ 5 4-9/32″ 2-1/2″ 3/4″ 1-1/2″ 4-1/8″ 3-1/4″ — 1-3/4″ 9/32″ 9.3
4B56Q Q1 5.2″ 5.6″ 5.95″ 5 4-9/32″ 2-1/2″ 3/4″ 1-1/2″ 4-1/8″ 3-1/4″ — 1-3/4″ 9/32″ 10.5
4B58Q Q1 5.4″ 5.8″ 6.15″ 13 3-17/32″ 2-1/2″ 0 3/4″ 4-1/8″ 3-1/4″ 3/4″ 1-3/4″ 9/32″ 11.5
4B60Q Q1 5.6″ 6.0″ 6.35″ 13 3-17/32″ 2-1/2″ 0 3/4″ 4-1/8″ 3-1/4″ 3/4″ 1-3/4″ 9/32″ 12.6
4B62Q Q1 5.8″ 6.2″ 6.55″ 13 3-17/32″ 2-1/2″ 0 3/4″ 4-1/8″ 3-1/4″ 3/4″ 1-3/4″ 9/32″ 12.6
4B64Q Q1 6.0″ 6.4″ 6.75″ 13 3-17/32″ 2-1/2″ 0 3/4″ 4-1/8″ 3-1/4″ 3/4″ 1-3/4″ 9/32″ 14.1
4B66Q Q1 6.2″ 6.6″ 6.95″ 13 3-17/32″ 2-1/2″ 0 3/4″ 4-1/8″ 3-1/4″ 3/4″ 1-3/4″ 9/32″ 14.8
4B68Q Q1 6.4″ 6.8″ 7.15″ 13 3-17/32″ 2-1/2″ 0 3/4″ 4-1/8″ 3-1/4″ 3/4″ 1-3/4″ 9/32″ 16.9
4B154R R1 15.0″ 15.4″ 15.75″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 40.1
4B160R R1 15.6″ 16.0″ 16.35″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 44.0
4B184R R1 18.0″ 18.0″ 18.75″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 50.3
4B200R R1 19.5″ 20.0″ 20.35″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 54.0
4B250R R1 24.5″ 25.0″ 25.35″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 71.0
4B300R R1 29.5″ 30.0″ 30.35″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 99.0
4B380R R1 37.5″ 38.0″ 38.35″ 13 3-25/32″ 2-7/8″ 1/4″ 5/8″ 5-3/8″ 3-1/4″ 7/8″ 2″ 9/32″ 126.0

Industrial Applications

4B series split taper bushed sheaves are widely deployed across heavy-duty equipment and industrial machinery drive systems, including:

  • Air compressors and industrial blowers
  • Oil and gas pumping equipment
  • Marine and shipboard mechanical drives
  • Mining crushers, conveyors, and screening machinery
  • Agricultural equipment, tractors, and processing units

Technological Processing & Quality Control

Manufacturing Technological Processing for V-Belt Pulleys

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Packing&Shipping & Delivery

china Packing Shipping Delivery

Packing Shipping Delivery

Chains package: First we will use carton package the chains--------then put in wooden box.
We also can custom color package according to your demand
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FAQ

How to choose power transmissions parts and industrial products which meet our requirement

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What Products Do you sell ? 

We  are a group of factories, give customer one stop solution of power transmission and industrial products. We are in the position to supply wide range of products, including chains, sprockets, v-belt and v-belt pulleys, timing belt and timing belt pulleys, gears, speed reducers, motors, racks, couplings, and many other parts, like locking assembly, taper bushing, Chain guide, shaft collar, torque limiter, cam clutch, universal joint, motor base and motor slide, rod end, clevis, rubber mount, etc. We make special parts according to drawings and/or samples.

How to choose a gearbox which meets our requirement?
You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.

What information shall we give before placing a purchase order?
a) Type of the gearbox, ratio, input and output type, input flange, mounting position, and motor informationetc.
b) Housing color.
c) Purchase quantity.
d) Other special requirements.

What industries are your gearboxes being used?
Our gearboxes are widely used in the areas of textile, food processing, beverage, chemical industry,
escalator,automatic storage equipment, metallurgy, tabacco, environmental protection, logistics and etc.

What is the producing process?

Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.

How to control the products quality?

Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.

What is the transportation?

-If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large amount, by air or sea shipping.

Can we design packaging?

-Yes. Default is regular packing, and we can make customer's own packing.

Can you provide OEM service?

-Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.

Can you give me discount on Power Transmissions Parts and Industrial parts?

-Yes, of course. Pls. send me your Email, you'll get more

Q: Are You a trading company or a manufacturer?

A: We Are the factory and have our Own trading company

Q: How Can I get an offer?

A: please send US quotation information: drawings, materials, weight, quantity and requirements, we can accept PDF, ISGS, DWG, STEP file format. If you don't have the drawings, please send us the samples, we can also quote you according to your samples.

Q: What is your minimum order size?

A: it is usually 100 pieces, but a low quantity is acceptable under some special circumstances.

Q: Do you provide samples? Is it free or extra?

A: Yes, we can provide samples free of charge, but we don't pay the freight.

Q: What is the lead time for mass production?

A: honestly, it depends on the number of orders. Normally, if you don't need the tools, deposit them after 30 days or so.

Q: What if the parts don't Work?

A: we can guarantee the quality, but if it happens, please contact us immediately, take some photos, we will check the problem and solve it as soon as possible.

Q: What are your terms of payment?

A: payment is less than US $1000,100% in advance. Payment: $1000,50% wire transfer in advance, balance before shipment,Other Terms of payment are negotiable