8D Series Cast Iron QD Bushing Sheaves Pulley for “D” Belts

8D series eight-groove QD bushed sheaves are manufactured for D-series classic v-belts and D-banded belts; they range from 12.64″ to 58.64″ in diameter. Depending on the sheave size, they are made to use J, M, or N QD (quick detachable) bushings, which we also stock. Most of our 8D QD sheaves 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.

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8D Series Cast Iron QD Bushing Sheaves Pulley for "D" Belts

8D series eight-groove QD bushed sheaves are manufactured for D-series classic v-belts and D-banded belts; they range from 12.64" to 58.64" in diameter. Depending on the sheave size, they are made to use J, M, or N QD (quick detachable) bushings, which we also stock. Most of our 8D QD sheaves 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.

8D QD Sheave Size Chart

Bushing Type
Pitch Diameter
Outside Diameter
Sheave Weight (LBS)
8D120J J A 12.0" 12.64" 2-1/8" 11-13/16." 4-5/8" 5-1/16" 140
8D130J J A 13.0" 13.64" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 150
8D135J J A 13.5" 14.14" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 160
8D140J J A 14.0" 14.64" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 170
8D145J J A 14.5" 15.14" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 178
8D150J J A 15.0" 15.64" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 182
8D155J J A 15.5" 16.14" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 190
8D160J J A 16.0" 16.64" 2-1/8" 11-13/16" 4-5/8" 5-1/16" 201
8D180M M A 18.0" 18.64" 2-11/32" 11-13/16" 6-3/4" 2-23/32" 260
8D200M M A 20.0" 20.64" 2-11/32" 11-13/16" 6-3/4" 2-23/32" 270
8D220M M A 22.0" 22.64" 11/32" 11-13/16" 6-3/4" 4-23/32" 300
8D270M M A 27.0" 27.64" 11/32" 11-13/16" 6-3/4" 4-23/32" 350
8D330M M A 33.0" 33.64" 11/32" 11-13/16" 6-3/4" 4-23/32" 450
8D400N M A 40.0" 40.64" 3/16" 11-13/16" 8-1/8" 3-1/2" 550
8D480N M A 48.0" 48.64" 3/16" 11-13/16" 8-1/8" 3-1/2" 720
8D580N N A 58.0" 58.64" 3/16" 11-13/16" 8-1/8" 3-1/2" 900

Related Matching D-Series, D-Series Banded V-Belts

(1) D-Series V-Belts

Classic D-Series V-Belts have a 1.25" top-width, 0.75" thickness, and a 40° angle. Additionally, D V-belts are one of the oldest styles of V-Belts in the industry. Because of their long-term success and economical operation, they are also one of the industry's most widely used belt series. The premium D-series v-belts we supply are manufactured under ISO 9001 specifications, are oil and heat resistant, and directly interchange with other brands. They are constructed of a natural rubber compound with polyester cords and use cotton with a polyester blend cover for high durability.

(2) D-Series Banded V-Belts

D-series v-belts are a part of the "classic" lineup of v-belts because they are one of the oldest style belts used and one of the most common. Our belts are manufactured by ARPM standards and offer superior strength, durability, and performance. D-series v-belts have a 1-1/4" top-width per belt (band/ rib).

Related QD Bushings | Quick Disconnect Bushings

QD bushings are utilized throughout the industrial power transmission and agricultural industry for various sprockets, sheaves, pulleys, and synchronized drives. They are designed for easy installation and easy uninstallation; they are also commonly referred to as quick-disconnect bushings. QD bushings can help conventional mounting with the flange outboard and reverse mounting to where the flange is inboard and utilize a single split that extends through the entire bushing length. Our QD bushings interchange with other brands and are made from high-grade steel precision machined for perfect application fitment. QD bushings' benefits over different styles include; ease of installation/ uninstall, superior holding power, and extreme strengths. We stock all the standard sizes of QD bushings and supply custom QD bushings upon request.

Bushing Type
Bolt Circle
Cap Screws Required
Min. Stock Bore
Max. Bore W/ KW
Max Bore W/ Shallow KW
Set Screw Size
Avg. Weight (LBS)
J 1.000" 5.148" 7.250" 3.500" 3.188" 0.423" 4.500" 6.250" 3 - 0.625X4.5 1.438" 3.750" 4.500" 0.625 - 11 18.0
M 1.250" 6.500" 9.000" 5.500" 5.188" 0.423" 6.750" 7.875" 4 - 0.75X6.75 1.938" 4.750" 5.500" 0.75 - 10 37.0
N 1.500" 7.000" 10.25" 6.625" 6.250" 0.423" 8.125" 8.500" 4 - 0.875X8.5 2.438" 5.125" 6.000" 0.75 - 10 57.0

Matters Needing Attention in the Assembly of Tapered Pulley

There are many application advantages of the tapered sleeve pulley. The 8-degree outer tapered surface is tightly connected with the inner tapered surface of the pulley, which can significantly improve the centering accuracy of the transmission parts. Moreover, its versatility and interchangeability are excellent and can be applied to various occasions. Even if the inner hole and the chain groove are damaged during long-term operation, they can be restored only by replacing the taper sleeve to the exact specification, reducing the follow-up maintenance cost.

Matters needing attention in the assembly of the tapered sleeve pulley:

(1) Gasoline must be used for the first cleaning before and after the assembly of the tapered sleeve pulley to ensure that the parts are clean and dry to ensure that the mating surfaces are tightly fitted without oil stains and have sufficient friction.

(2) It should be washed with gasoline and dried before assembling with hexagon socket head bolts. Do not apply lubricating oil or grease in the bolts or screw holes to ensure sufficient friction and self-locking ability after the bolts are tightened.

(3) When the three hexagon socket bolts are about to be installed, they need to be tightened in turn to ensure that the tapered sleeve is subjected to uniform axial force and the pulley and the tapered sleeve are well positioned coaxially.

(4) Before installation, check and measure the length of the hexagon socket head bolts for assembly to ensure that the assembly bolts can withstand the bottom end of the blind hole of the taper sleeve after tightening to ensure that the tapered surface fits tightly, and to ensure that the bolts are subjected to the reverse thrust of the bottom end of the blind hole, resulting in double The same anti-loosening effect as the nut principle.

(5) After the tapered sleeve pulley is tightened, check and adjust the relative position of the primary and driven pulleys by pulling the wire to ensure that the two pulleys are on the same plane and the belt tension is moderate.

(6) The pulley cover should be intact and installed firmly to ensure that the belt is broken or the pulley is loosened and withdrawn during operation, resulting in a significant safety accident.

(7) After many years of long-term operation of mechanical equipment, it is necessary to check the inner hole and chain groove condition regularly, there may be damage, and spare parts should be replaced in time if defects are found.

Technological Processing

Company Profile

HZPT is a professional manufacturer of mechanical parts. Our main products are belt pulleys, sprockets, taper sleeves, coupling, and other transmission parts. Its products are mainly exported to Germany, Britain, France, and other European countries, with an annual export value of 18 million U.S. dollars, accounting for more than 65% of the total output. The annual output value reached 200 million yuan.

Our products all adopt international, European, and American advanced industrial standards, use precise and good processing equipment, develop reasonable production technology, apply efficient and flexible management systems, and improve the quality management system to ensure that the product quality is good and the price is affordable.

Our factory adheres to the enterprise concept of "quality: the basis of enterprise survival, integrity: the basis of enterprise development, service: the source of enterprise development, low price: the instrument of enterprise development." We are always looking forward to the presence of customers at home and abroad, seeking win-win benefits and joint cause development.

Warehouse Stock

The warehouse covers an area of 5000 square meters and can provide all kinds of standard models A/B/C/Z, with complete quantity and large quantity in stock. Meanwhile, it accepts all sorts of non-standard customization for drawing production. The daily production capacity is 10 tons, and the delivery time is short.

Packaging & Shipping

Experienced Workers Packing Pulleys Carefully, safe wooden cases keep parts from being injured or damaged during sea or air shipment.


Q1. Are you a manufacturer or a trading company?

A: We are a manufacturer and trading company.

Q2. What is your sample policy?

A: We can supply the sample if we have finished parts in stock, but customers need to pay for the sample cost and shipping fee.

Q3. Can you produce according to the samples?

A: We can produce power transmission parts according to your samples or technical drawings. We can build the molds and fixtures.

Q4. Do you test all your goods before delivery?

A: Yes, we have 100% test before delivery.

Q5. Can you customize pulleys?

A: Yes, please send us your drawing for an accurate quotation.

Q6. How long is your delivery time and shipment?

A: 1. Sample Lead-times: 10-20 days.

2. Production Lead-times: 30-45 days after the order is confirmed.

Q7. How do you make our business a long-term and good relationship?

A: 1. We keep good quality and competitive price to ensure our customers' benefits ;

2. We respect every customer as our friend and sincerely do business and make friends with them, no matter where they come from.

Q8: What are your advantages?

1. The most competitive price and good quality.

2. Perfect technical engineers give you the best support.

3. OEM is available.

Additional information



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We promise will offer the best price by the high quality in china! We also accept special order about the products. If you are interested in our products. Please do not hesitate to let us know.We are pleased to give you the detailed information.We promise that our products would be safety and were in high quality and reasonable price. If you are interested in our products, please contact us asap.We are sincerely looking for your cooperation.

Most of our products are exported to Europe or Americas, both standard and nonstandard products available. We can produce as per your drawing or sample. Material can be standard or as per your special request. If you choose us, you choose reliable.

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