12D Series Cast Iron QD Bushing Sheaves Pulley for “D” Belts

12D Series Cast Iron QD Bushing Sheaves Pulley for “D” Belts

12D series twelve-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 M, N, or P QD (quick detachable) bushings, which we also stock. Most of our 12D 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.

12D QD Sheave Size Chart

Size	Bushing Type	Type	Pitch Diameter	Outside Diameter	(E)	(F)	(L)	(M)	Sheave Weight (LBS)
12D120M	M	A	12.0"	12.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	220
12D130M	M	A	13.0"	13.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	250
12D135M	M	A	13.5"	14.14"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	270
12D140M	M	A	14.0"	14.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	280
12D145M	M	A	14.5"	15.14"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	300
12D150M	M	A	15.0"	15.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	305
12D155M	M	A	15.5"	16.14"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	310
12D160M	M	A	16.0"	16.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	320
12D180M	M	A	18.0"	18.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	340
12D200M	M	A	20.0"	20.64"	3-11/32"	17-9/16"	6-3/4"	7-15/32"	360
12D220M	M	A	22.0"	22.64"	3-11/32"	17-9/16"	6-3/4"	8-15/32"	400
12D270N	N	A	27.0"	27.64"	2-3/16"	17-9/16"	8-1/8"	7-1/4"	520
12D330N	N	A	33.0"	33.64"	2-5/16"	17-9/16"	8-1/8"	7-1/4"	665
12D400P	P	A	40.0"	40.64"	1/4"	17-9/16"	9-3/8"	7-15/16"	870
12D480P	P	A	48.0"	48.64"	1/4"	17-9/16"	9-3/8"	7-15/16"	1090
12D580P	P	A	58.0"	58.64"	1/4"	17-9/16"	9-3/8"	7-15/16"	1300

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	(A)	(B)	(D)	(E)	(F)	(G)	(L)	Bolt Circle	Cap Screws Required	Min. Stock Bore	Max. Bore W/ KW	Max Bore W/ Shallow KW	Set Screw Size	Avg. Weight (LBS)
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
P	1.750"	8.250"	11.75"	7.625"	7.250"	0.423"	9.375"	10.00"	4 - 1X9.5	2.938"	5.983"	7.000"	0.875 - 9	120.0

Correct Installation Steps for Pulleys and Taper Sleeves

1. Remove the oil, paint, and contaminants remaining on the shaft, the inner hole of the tapered sleeve, the outer surface of the tapered sleeve, and the surface of the tapered hole of the pulley, and remove the surface burrs. Note: The use of lubricant will cause the pulley to crack, do not use any lubricant when installing.2. Put the taper sleeve into the taper hole of the pulley, aligning each hole (each complete hole has only half of the thread).3. Add a little oil to the thread of the mounting screw, and then screw it into the half-threaded hole of the pulley. Note: Do not lubricate the tapered surface of the tapered sleeve, the tapered surface of the hub, the inner hole of the tapered sleeve, and the shaft. The use of lubricant will cause the pulley to break.4. Install the key in the keyway of the shaft, install the tapered sleeve of the pulley on the shaft, and position it, allowing the pulley to move slightly axially when it is locked. Note: When installing a v belt pulley on a vertical shaft, take precautions to prevent the pulley or taper from falling off during installation.5. Tighten the mounting screws alternately until the tapered surface of the pulley and the tapered sleeve are entirely fitted. NOTE: Do not use a worn hex wrench as it may cause loose fitting or damage to the mounting screws.6. Check alignment and pulley runout (swing); correct if necessary.7. Continue to alternately tighten the mounting screws to the recommended shrinking torque value of the mounting screws, and do not apply additional force after reaching the recommended tightening torque value of the mounting screws.8. To increase the gripping force of the taper sleeve, tap the end face of the taper sleeve moderately with a hammer through the pad iron or sleeve. Note: Do not hit the taper sleeve directly with a hammer.9. Tighten the taper sleeve mounting screws again after tapping.10. Re-check the torque after the first test run, and check it regularly in the future. If it is loose, repeat steps 5-9.

Technological Processing

Company Profile

Raydafon 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.

FAQ

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.