Product Description

MXL, XL,L,H Type MSM Standard bore Timing Pulley

Shape:

Advantages:
1. Good quality products
2. Competitive prices
3. Fast delivery
4. Best after-sale service

Company Introduction: 
Hefa Produce items mainly include timing pulley series, precising grinding gear series and planetary gear reducer series. ” Focus and Professional on the Development of Conveyor Field” is our CZPT aim.
We are a professional manufacturer, can produce the whole series of parts and meet various demands for different requests. We can also make the parts according to buyer’s design or drawings.
We have introduced advanced equipment.

Basic Information:

Specification	Standard or Custom made
Material	Stainless steel,,brass, carbon steel, aluminum, and so on.
Surface Treatment	Zn-plating, Ni-plating, Cr-plating, Tin-plating, Copper-plating, the wreath oxygen resin spraying, black oxide coating, painting, powdering, color zinc-plated,blue black zinc-plated, silver plating,anodizing etc.
Main Products	Precision spur gear, Timing pulley, Bevel pulley, Worm& worm gear, Timing Belt..
Producing Equipment	CNC machine , automatic lathe machine,stamping machine,CNC milling machine,rolling machine, lasering, tag grinding machine etc.
Management System	ISO9001 – 2008
Testing Equipment	Projecting apparatus, Salt Spray Test, Durometer, and Coating thickness tester , 2D projector
Lead time	10-15 working days as usual, 30days in busy season, it will based on the detailed order quantity.
Delivery of Samples	By DHL, Fedex, UPS,  TNT, EMS
Main Markets	North America, South America, Eastern Europe , West Europe , North Europe, South Europe, Asia
How to order	* You send us drawing or sample
	* We carry through project assessment
	* We give you our design for your confirmation
	* We make the sample and send it to you after you confirmed our design
	* You confirm the sample then place an order and pay us 30% deposit
	* We start producing
	* When the goods is done, you pay us the balance after you confirmed pictures or tracking numbers.
	* Trade is done, thank you!!
Applications	Toy, Automotive, instrument, electrical equipment, household appliances, furniture, mechanical equipment,daily living equipment, electronic sports equipment, , sanitation machinery, market/ hotel equipment supplies, etc.

 
Packaging and Delivering:

Technical Profile:

 

Part Number				[ M ] Material			[ S ] Surface Treatment
Belt Width 19.1mm (3/4inch)	Belt Width 25.4mm (1inch)	Belt Width 38.1mm (1.5inch)	Belt Width 50.8mm (2 inches)	Pulley	Flange	Bushing	Pulley	Flange	Bushing
A: 21W: 26	A: 27W: 32	A: 40W: 45	A: 54W: 59
AW_ _HK191	AW_ _HK254	AW_ _HK381	AW_ _HK508	Aluminum Alloy 6061		1045 Carbon Steel	Clear Anodize		–
SF_ _HK191	SF_ _HK254	SF_ _HK381	SF_ _HK508	1045 Carbon Steel	Low Carbon Steel	1045 Carbon Steel	Black Oxide
SN_ _HK191	SN_ _HK254	SN_ _HK381	SN_ _HK508				Electroless Nickel Plating

Specifications:

Part Number			Pulley Shape	dH7 Range (Select Shaft Bore Dia. from Table 1)								P.D.	O.D.	F	E
				HK191		HK254		HK381		HK508
Type	Teeth	Type, Nominal Width		EShape	FShape	EShape	FShape	EShape	FShape	EShape	FShape
AW SF SN	14	HK191 *A: 21 *W: 26 HK254 *A: 27 *W: 32 HK381 *A: 40 *W: 45 HK508 *A: 54 *W: 59	E F	12~17	12~17	12~17	12~17	15~17	15~17	16~17	16~17	56.60	55.22	61	45
	15			14~20	14~20	14~20	14~20	15~20	15~20	16~20	16~20	60.64	59.27	67	50
	16			14~25	14~25	14~25	14~25	15~25	15~25	16~25	16~25	64.68	63.31	70	56
	17											68.72	67.35	80	60
	18											72.77	71.39
	19			14~32	14~32	14~32	14~32	15~32	15~32	16~32	16~32	76.81	75.44	87	67
	20											80.85	79.48	87	67
	21			14~35		14~35		15~35	15~35	16~35	16~35	84.89	83.52	95	75
	22											88.94	87.56
	24			19~35	19~32	19~35	19~32	19~35	19~35	19~35	19~35	97.02	95.65	104	84
	25			19~42		19~42		19~42	19~42	19~42	19~42	101.06	99.69	111	90
	26			20~42	20~32	20~42	20~30	20~42	20~42	20~42	20~42	105.11	103.73
	28											113.19	111.82	123	102
	30											121.28	119.90	127	105
	32					20~48		20~48		20~48	20~48	129.36	127.99	135	115
	34					20~50		20~50		20~50	20~50	137.45	136.07	144	125
	36									20~50	20~50	145.53	144.16	152	130
	38			–					25~42	–		153.62	152.24	165	140
	40											161.70	160.33	170	150
	42											169.79	168.41	180	155
	44											177.87	176.50	190	170
	48											194.04	192.67	205	180
	50											202.13	200.76	210	1

 

Table 1: Select Shaft Bore Diameter

dH7	Max. Allowable Torque Nm		D		(L)
	ST Bushing	SH Bushing	ST Bushing	SH Bushing
12	48	23	32	31	10.5
14	73	37	35	36	12
15	78	39	36	37
16	83	42	37	38	13
17	88	45	38	39
18	154	48	43	40	14
19	163	49	45	42
20	171	97	46	46
22	186	110	48	47
24	206	121	50	49
25	216	124	52	51
28	353	141	54	53	15.5
30	382	149	57	56
32	412	163	59	58	16.5
35	451	173	63	61
38	686	–	70	–	19
40	725		71
42	757		74		20
45	1490		84		24.5
48	1600		87
50	1660		89

Brand: HeFa or OEM/ ODM

 

Overview of Different Types of Pulleys

A pulley is a wheel mounted on a shaft or shaft. Its purpose is to facilitate the movement or change of direction of the cable or taut rope, and to transmit power between the cable and the shaft. Pulleys are typically used for lifting, winding or forklift applications. If you are building your own pulley system, the following design and installation considerations should be followed. This article will give you an overview of the different types of pulleys.

Pulley System Mechanics

There are many different ways to utilize the mechanism of the pulley system. The most basic pulley system consists of a fixed wheel and a support frame. Both components are connected by ropes or cables used to support the load. A pulley system is effective when the force required to lift the load is less than the weight of the object being lifted.
One way to use a pulley system is to suspend a block with a mass of 0.80 kg on a fixed pulley. Then another person can hang a bucket weighing up to 40kg. The weight of the bucket is transferred to the fixed pulley. The rope is attached to the pulley by a loop or sling. The rope will spin and pull on the barrel or block.
The pulley system is also an important tool for lifting heavy objects. Pulleys are often used in construction equipment to make lifting heavy objects easier. Gun tackles, yard tackles, and stationary tackle systems are common examples of these devices. They use the mechanical advantage of the design to guide the force that lifts the object. If you want to learn more about pulley systems, visit Vedantu. This website will provide you with a full description of the mechanism and its application.

Types of pulleys

Many different types of pulleys are used to lift heavy objects. They change the direction of the force and are an integral part of the cable system. Therefore, pulleys can move large and heavy objects more easily. However, before buying a pulley, you should have an idea of ​​the benefits it brings. Below are some of the most common uses for pulleys.
Conical Pulley: Consists of several small conical pulleys connected to each other. The larger base of 1 pulley is used to guide the force. Round pulleys are used in the same way as step pulleys. They are widely used in industry and can be purchased at any hardware store. Pulleys are a huge investment, and the benefits they provide far outweigh the cost.
Movable Pulls: These are similar to their names, but work by allowing objects to move with the pull. Their movable parts are attached to the object to be lifted. They are also ideal for lifting heavy loads and can be found in utility elevators and construction cranes. They are also used in many other industries. They can also be made of wood, plastic or metal. The type of pulley you use depends on its intended use.

Mechanical Advantages of Pulley Systems

A pulley system is a simple machine that reduces the effort required to lift heavy loads. This mechanical advantage is proportional to the number of loops. For example, if you have a single rope loop, you must apply equal force to lift the weight. When you add another rope loop, you can lift heavier weights just by applying the same force. Therefore, a pulley system is an excellent way to use gravity to your advantage.
Mechanical advantage is a measure of the effectiveness of a pulley system. This ratio of force to work is called the mechanical advantage. In other words, if the rope system has a large mechanical advantage, it means that it requires less force to lift heavier loads. This advantage is usually measured in kilograms and is the same for all pulley systems. In general, the greater the mechanical advantage, the less effort is required to lift the load.
The mechanical advantage of a pulley system is that a single movable pulley requires half the force to lift an object than a single fixed pulley. Assuming frictionless bearings, the MA of a single pulley system is 2, similar to the MA of a single lever. A single pulley travels twice as much as it takes to move heavy objects manually.

Considerations when designing and installing a pulley system

The capacity of the pulley depends on the type and diameter of the cable. Besides its diameter, its sheath should also support it well. The basic function of the pulley is also important. However, most people tend to ignore the pulley selection process, resulting in ineffective load-pull capabilities. To avoid such problems, different parameters must be carefully considered during design and installation.
During the design and installation of the pulley system, the ratio of the cable diameter to the largest pulley diameter must be considered. Those who work in the industrial sector will have an idea of ​​this ratio. The greater the D:d ratio, the greater the capacity of the cable to withstand the load. The best way to ensure secure design is to take the right information and use it to design a system that is both robust and secure.
When designing a pulley system, it is important to remember that the pulley needs to have enough power to operate safely. In addition to horsepower, the belt should have sufficient elongation to absorb shock loads. If the elongation of the belt is very small, it is very likely that the teeth will be sheared or broken, causing serious damage to the system. Extensive belt sag should be compensated for by offsetting the driven pulley. Finally, the frame supporting the pulley should be rigid. Otherwise, the non-rigid frame will cause center distance and tooth skipping changes.

Add more pulleys to the system

Adding more pulleys to the spool might have some effect. The friction between the rope and the pulley increases with the number of pulleys, which in practice limits the number of spools. The best solution is to combine the pulleys into 1 housing. If the load is small enough, adding a few pulleys probably won’t make a difference.
Using multiple pulleys allows a single load to be lifted with half the force required. The longer the rope, the greater the mechanical advantage. In fact, a spool can withstand a load of 100 N. Additionally, adding more pulleys quadrupled the mechanical advantage. In this case, a single 100 N load would require a force of 25 Newtons.
When the rope is used, it stretches as the weight of the object increases. This will make the rope longer, increasing its length and increasing the distance over which the load can be lifted. Eventually, the rope will break and the lifted object will fall. Then you will have to buy a new rope. It may seem like an expensive proposition, but it pays off in the long run.

cast iron pulley

Cast iron pulleys are the most popular choice among industrial users. They are made of solid cast iron and usually cost very little. Their rims are held in place by a mesh that extends from a central boss. They also have spokes and arms that hold them in place. These pulleys are ideal for a variety of applications including fan belts, compressors and conveyors.
V-groove drive pulleys are ideal for general purpose pulleys. It has an inner diameter of 1 inch and is commonly used in feeders and ventilation curtain systems. Its steel straps prevent rust and ensure it meets or exceeds industry standards. 3-1/2″ cast iron pulleys are also available. In addition to the V-groove drive pulley, there are similar pulleys for power transmission. The V-groove drive pulley is powder coated for added durability.
The cross section of the arm is elliptical, with the long axis twice as long as the short axis. The radius of the arm is equal to the diameter of the pulley. The thickness of the arm is a key factor to consider when purchasing a pulley. If you’re not sure which material you need, you can always consider wooden or steel pulleys. They are lighter and have a higher coefficient of friction than metal pulleys.

timing pulley

Plastic timing pulleys have many advantages over steel timing pulleys. On the 1 hand, they are lightweight and corrosion resistant, making them ideal for applications that do not require high torque and tensile strength. Another benefit is their resistance to high temperatures. Plastic timing pulleys are ideal for applications involving flammable gases, solvents or particles. They can last for many years. For more information on the different types of plastic timing pulleys.
Vertical shaft drives require flanged timing pulleys. For large span drives, at least 1 of these pulleys must be flanged. The flange provides a secure connection to the shaft and prevents ratcheting of the timing belt. Finally, HTD timing belt teeth prevent timing belt ratcheting. These teeth need a large enough space to be seated. However, they can also cause a backlash. These pulleys are not suitable for applications where positional accuracy is critical.
Timing belt systems are designed to avoid such problems. The drive shaft and the driven shaft are aligned with each other. The pulleys are located on different planes and are connected by pitch lines. The pitch line of the timing pulley coincides with the pitch line of the belt. These pulleys are also easier to implement and maintain. It is better to use a synchronous system because the resulting gear system emits less noise than other systems.