5B Series Cast Iron QD Pulleys | 5-Groove A/B V-Belt Sheaves

5B series pulleys are manufactured for A, AX, AA, 4L, B, BX, BB, and 5L v-belts, ranging from 3.75″ to 38.35″ in diameter. Depending on the pulley size, they are made to use with SD, SK, SF, or E QD bushings, which we also stock. Most of our five-groove 5B QD 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

5B Series Cast Iron QD Pulleys (5-Groove A/B V-Belt Sheaves)

We precision-machine our 5B series five-groove QD (Quick Detachable) bushed pulleys for heavy-duty industrial power transmission drives. This series drives A (4L) and B (5L) classical V-belts—as well as AX, BX, AA, and BB profiles—and offers outside diameters from 3.75″ to 38.35″. Depending on the sheave diameter, these pulleys pair with standard SD, SK, SF, or E QD bushings to deliver versatile shaft mounting and high torque transfer.

5B Series QD Bushed Pulley Technical Drawing

Key Features & Engineering Advantages

  • High-Strength Construction: Machined from Grade 35 high-tensile cast iron to maintain structural integrity under severe operational loads.
  • Corrosion Protection: Treated with a phosphate conversion coating and painted for maximum corrosion resistance in harsh industrial environments.
  • Factory Dynamic Balance: Dynamically balanced at the factory to guarantee low vibration, smooth operation, and extended bearing service life.
  • Flexible QD Bushing Design: Quick Detachable bushings deliver high clamping force across various shaft sizes. Replacing individual components reduces equipment downtime and overall maintenance costs.

5B QD Pulleys Dimensional Specifications

Size Bushing Type Pulley Type Pitch Diameter (5L/B) Pitch Diameter (4L/A) Outside Diameter (E) (F) (L) (M) Pulley Weight (LBS)
5B34SD SD E 3.4″ 3.0″ 3.75″ 3-7/32″ 4″ 1-13/16″ 1-1/32″ 6.1
5B36SD SD E 3.6″ 3.2″ 3.95″ 3-7/32″ 4″ 1-13/16″ 1-1/32″ 6.6
5B38SD SD E 3.8″ 3.4″ 4.15″ 3-7/32″ 4″ 1-13/16″ 1-1/32″ 7.1
5B40SD SD E 4.0″ 3.6″ 4.35″ 2-27/32″ 4″ 1-13/16″ 21/32″ 7.4
5B42SD SD E 4.2″ 3.8″ 4.55″ 2-27/32″ 4″ 1-13/16″ 21/32″ 8.0
5B44SD SD E 4.4″ 4.0″ 4.75″ 2-27/32″ 4″ 1-13/16″ 21/32″ 8.5
5B46SD SD A 4.6″ 4.2″ 4.95″ 21/32″ 4″ 1-13/16″ 1-17/32″ 9.0
5B48SD SD A 4.8″ 4.4″ 5.15″ 21/32″ 4″ 1-13/16″ 1-17/32″ 9.4
5B50SD SD A 5.0″ 4.6″ 5.35″ 21/32″ 4″ 1-13/16″ 1-17/32″ 10.0
5B52SD SD A 5.2″ 4.8″ 5.55″ 21/32″ 4″ 1-13/16″ 1-17/32″ 10.4
5B54SK SK A 5.4″ 5.0″ 5.75″ 17/32″ 4″ 1-13/16″ 1-17/32″ 10.8
5B56SK SK A 5.6″ 5.2″ 5.95″ 17/32″ 4″ 1-13/16″ 1-17/32″ 11.3
5B58SK SK A 5.8″ 5.4″ 6.15″ 17/32″ 4″ 1-13/16″ 1-17/32″ 12.0
5B60SK
SK A 6.0″ 5.6″ 6.35″ 17/32″ 4″ 1-13/16″ 1-17/32″ 14.0
5B62SK SK A 6.2″ 5.8″ 6.55″ 17/32″ 4″ 1-13/16″ 1-17/32″ 15.0
5B64SK SK A 6.4″ 6.0″ 6.75″ 17/32″ 4″ 1-13/16″ 1-17/32″ 16.0
5B66SK SK A 6.6″ 6.2″ 6.95″ 17/32″ 4″ 1-13/16″ 1-17/32″ 17.0
5B68SK SK A 6.8″ 6.4″ 7.15″ 17/32″ 4″ 1-13/16″ 1-17/32″ 18.0
5B70SF SF A 7.0″ 6.6″ 7.35″ 15/32″ 4″ 1-15/16″ 1-15/32″ 19.0
5B74SF SF A 7.4″ 7.0″ 7.75″ 15/32″ 4″ 1-15/16″ 1-15/32″ 20.0
5B80SF SF A 8.0″ 7.6″ 8.35″ 15/32″ 4″ 1-15/16″ 1-15/32″ 21.0
5B86SF SF A 8.6″ 8.2″ 8.95″ 15/32″ 4″ 1-15/16″ 1-15/32″ 22.0
5B94SF SF A 9.4″ 9.0″ 9.75″ 15/32″ 4″ 1-15/16″ 1-15/32″ 24.0
5B110SF SF A 11.0″ 10.6″ 11.35″ 15/32″ 4″ 1-15/16″ 1-15/32″ 29.0
5B124SF SF A 12.4″ 12.0″ 12.75″ 15/32″ 4″ 1-15/16″ 1-15/32″ 34.0
5B136SF SF A 13.6″ 13.2″ 13.95″ 15/32″ 4″ 1-15/16″ 1-15/32″ 38.0
5B154SF SF A 15.4″ 15.0″ 15.75″ 15/32″ 4″ 1-15/16″ 1-15/32″ 46.0
5B160SF SF A 16.0″ 15.6″ 16.35″ 15/32″ 4″ 1-15/16″ 1-15/32″ 49.0
5B184SF SF A 18.4″ 18.0″ 18.75″ 15/32″ 4″ 1-15/16″ 1-15/32″ 55.0
5B200E E A 20.0″ 19.6″ 20.35″ 3/32″ 4″ 2-3/4″ 1-5/32″ 65.0
5B250E E A 25.0″ 24.6″ 25.35″ 3/32″ 4″ 2-3/4″ 1-5/32″ 86.0
5B300E E A 30.0″ 29.6″ 30.35″ 3/32″ 4″ 2-3/4″ 1-5/32″ 102.0
5B380E E A 38.0″ 37.6″ 38.35″ 3/32″ 4″ 2-3/4″ 1-5/32″ 132.0

5B Series QD Sheave Application Diagram

 

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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

Chains Sprockets Pulleys Timing belt Pulley V-belt Pulley
Sheaves Coupings Bush &Hub Gear& Rack V-Belt
Locking Assembly Pulley Gearbox Reducer Shaft Collar
Rod End Bearing Clevis PTO Chain Guide Belt Guide
Rubber Buffer Chain Tensioner PTO Drive Shafts Universal Joints Roller Chains
Conveyor Chains V-Belts Worm Gearbox Helical Gear Worm
Agricultural Chain CNC Proces Parts Casting Stamping
Powder Metallurgy CNC Proces Parts Casting Stamping

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