Tag Archives: agricultural bearing

China Hot selling Universal Joints cross bearing couplings supply drive agriculture machinery parts tractor gear gearbox post hole digger agricultural gearbox for sale

Warranty: 3 years
Applicable Industries: Other
Customized support: OEM, ODM
Structure: Universal Joint Cross Bearing
Material: Stainless Steel, Stainless Steel, Stainless Steel
Size: Customized Size
Model Number: As show
Service: OEM Customized Services
Type: U-joint Bearing
Brand: BSKJ
Application: Machinery
Packing: OEM ODM Customized
MOQ: 50pcs
Surface treatment: Polishing
Packaging Details: 1.pc/plastic bag + color box + carton + pallet; 2.plastic tube + carton + pallet; 3.plastic bag + kraft paper + carton + pallet;
Port: HangZhou

Products Display Product Paramenters

Part NO.DmmOmmLmm
GUN-2532211
GUN-2623.826461.3
GUN-2725401
GUN-2820.013557
GUN-2928531
GUN-3030.188192.08
GUN-31321107
GUN-3235.51119.2
GUN-33431128
GUN-3425521
GUN-3625177.6
GUN-382645.61
GUN-41431136
GUN-4355.11163.8
GUN-4420.5156.6
GUN-4520.7152.4
GUN-4627461
GUN-4727171.75
GUN-4827181.75
GUMZ-125163.8
GUMZ-222.02155
GUMZ-332571
GUMZ-62855.880.4
GUMZ-725.02411
GUMZ-837671
GUMZ-926.534871
GUMZ-1022.5351
GUMZ-1122.06159.6
GUMZ-1224.06171.6
GUM-71441129
GUN-72381104
GUM-7327181.75
GUN-7531.81102
GUM-7625.02177.6
GUN-7727165.3
GUN-7825163.8
GUN-7925163.8
GUN-80461142
Application Main Products Why Choose Us Packaging And Transportation FAQ If you have any other questions, please feel free to contact us as follows.Q: Why did you choose us? A. (1) We provide the best quality bearings with reasonable price, low friction, low noise and long service life. (2) With sufficient stock and fast delivery, you can choose our freight forwarder or your freight forwarder. (3) The best service provided by a well-trained international sales team. Q: How long is your delivery time? A:Generally speaking, if the goods are in stock, it is 1-3 days. If the goods are out of stock, it will take 6-10 days, dependingon the quantity of the order. Q: Do you provide samples? Is it free or extra? A:Yes, we can provide a small amount of free samples. Do you mind paying the freight? Q:Could you offer door to door service? A:Yes,by express(DHL,FEDEX,TNT,EMS,4-10 days to your city.)Q:Dose your factory have any certificate? A:Yes.we have ISO 9001:2008,IQNET and SGS. If you want other like CE,we can apply foryou.Q: What should I do if I don’t see the type of bearings I need? A:We have too many bearing series numbers. Sometimes we can’t put them all on Alibaba. Just send us the inquiry and we will bevery happy to send you the bearing details. Welcome to contact me anytime!

How to Select a Gearbox

When you drive your vehicle, the gearbox provides you with traction and speed. The lower gear provides the most traction, while the higher gear has the most speed. Selecting the right gear for your driving conditions will help you maximize both. The right gearing will vary based on road conditions, load, and speed. Short gearing will accelerate you more quickly, while tall gearing will increase top speed. However, you should understand how to use the gearbox before driving.
gearbox

Function

The function of the gearbox is to transmit rotational energy to the machine’s drive train. The ratio between input and output torque is the ratio of the torque to the speed of rotation. Gearboxes have many different functions. A gearbox may have multiple functions or one function that is used to drive several other machines. If one gear is not turning, the other will be able to turn the gearbox. This is where the gearbox gets its name.
The pitch-controlled system has an equal number of failure modes as the electrical system, accounting for a large proportion of the longest machine downtime and halt time. The relationship between mechanisms and faults is not easily modeled mathematically. Failure modes of gearboxes are shown in Fig. 3. A gearbox’s true service life is six to eight years. However, a gearbox’s fault detection process must be developed as mature technology is required to reduce the downtime and avoid catastrophic incidents.
A gearbox is a vital piece of machinery. It processes energy produced by an engine to move the machine’s parts. A gearbox’s efficiency depends on how efficiently it transfers energy. The higher the ratio, the more torque is transferred to the wheels. It is a common component of bicycles, cars, and a variety of other devices. Its four major functions include:
In addition to ensuring gearbox reliability, a gearbox’s maintainability should be evaluated in the design phase. Maintainability considerations should be integrated into the gearbox design, such as the type of spare parts available. An appropriate maintenance regime will also determine how often to replace or repair specific parts. A proper maintenance procedure will also ensure that the gearbox is accessible. Whether it is easy to access or difficult to reach, accessibility is essential.

Purpose

A car’s transmission connects the engine to the wheels, allowing a higher-speed crankshaft to provide leverage. High-torque engines are necessary for the vehicle’s starting, acceleration, and meeting road resistance. The gearbox reduces the engine’s speed and provides torque variations at the wheels. The transmission also provides reversing power, making it possible to move the vehicle backwards and forwards.
Gears transmit power from one shaft to another. The size of the gears and number of teeth determine the amount of torque the unit can transmit. A higher gear ratio means more torque, but slower speed. The gearbox’s lever moves the engaging part on the shaft. The lever also slides the gears and synchronizers into place. If the lever slips to the left or right, the engine operates in second gear.
Gearboxes need to be closely monitored to reduce the likelihood of premature failure. Various tests are available to detect defective gear teeth and increase machine reliability. Figure 1.11(a) and (b) show a gearbox with 18 teeth and a 1.5:1 transmission ratio. The input shaft is connected to a sheave and drives a “V” belt. This transmission ratio allows the gearbox to reduce the speed of the motor, while increasing torque and reducing output speed.
When it comes to speed reduction, gear box is the most common method for reducing motor torque. The torque output is directly proportional to the volume of the motor. A small gearbox, for example, can produce as much torque as a large motor with the same output speed. The same holds true for the reverse. There are hybrid drives and in-line gearboxes. Regardless of the type, knowing about the functions of a gearbox will make it easier to choose the right one for your specific application.
gearbox

Application

When selecting a gearbox, the service factor must be considered. Service factor is the difference between the actual capacity of the gearbox and the value required by the application. Additional requirements for the gearbox may result in premature seal wear or overheating. The service factor should be as low as possible, as it could be the difference between the lifetime of the gearbox and its failure. In some cases, a gearbox’s service factor can be as high as 1.4, which is sufficient for most industrial applications.
China dominates the renewable energy industry, with the largest installed capacity of 1000 gigawatts and more than 2000 terawatt hours of electricity generated each year. The growth in these sectors is expected to increase the demand for gearboxes. For example, in China, wind and hydropower energy production are the major components of wind and solar power plants. The increased installation capacity indicates increased use of gearboxes for these industries. A gearbox that is not suitable for its application will not be functional, which may be detrimental to the production of products in the country.
A gearbox can be mounted in one of four different positions. The first three positions are concentric, parallel, or right angle, and the fourth position is shaft mount. A shaft mount gearbox is typically used in applications where the motor can’t be mounted via a foot. These positions are discussed in more detail below. Choosing the correct gearbox is essential in your business, but remember that a well-designed gearbox will help your bottom line.
The service factor of a gearbox is dependent on the type of load. A high shock load, for example, can cause premature failure of the gear teeth or shaft bearings. In such cases, a higher service factor is required. In other cases, a gearbox that is designed for high shock loads can withstand such loads without deteriorating its performance. Moreover, it will also reduce the cost of maintaining the gearbox over time.

Material

When choosing the material for your gearbox, you must balance the strength, durability, and cost of the design. This article will discuss the different types of materials and their respective applications and power transmission calculations. A variety of alloys are available, each of which offers its own advantages, including improved hardness and wear resistance. The following are some of the common alloys used in gears. The advantage of alloys is their competitive pricing. A gear made from one of these materials is usually stronger than its counterparts.
The carbon content of SPCC prevents the material from hardening like SS. However, thin sheets made from SPCC are often used for gears with lower strength. Because of the low carbon content, SPCC’s surface doesn’t harden as quickly as SS gears do, so soft nitriding is needed to provide hardness. However, if you want a gear that won’t rust, then you should consider SS or FCD.
In addition to cars, gearboxes are also used in the aerospace industry. They are used in space travel and are used in airplane engines. In agriculture, they are used in irrigation, pest and insect control machinery, and plowing machines. They are also used in construction equipment like cranes, bulldozers, and tractors. Gearboxes are also used in the food processing industry, including conveyor systems, kilns, and packaging machinery.
The teeth of the gears in your gearbox are important when it comes to performance. A properly meshing gear will allow the gears to achieve peak performance and withstand torque. Gear teeth are like tiny levers, and effective meshing reduces stress and slippage. A stationary parametric analysis will help you determine the quality of meshing throughout the gearing cycle. This method is often the most accurate way to determine whether your gears are meshing well.
gearbox

Manufacturing

The global gear market is divided into five key regions, namely, North America, Europe, Asia Pacific, and Latin America. Among these regions, Asia Pacific is expected to generate the largest GDP, owing to rapidly growing energy demand and investments in industrial infrastructure. This region is also home to some of the largest manufacturing bases, and its continuous building of new buildings and homes will support the industry’s growth. In terms of application, gearboxes are used in construction, agricultural machinery, and transportation.
The Industrial Gearbox market is anticipated to expand during the next several years, driven by the rapid growth of the construction industry and business advancements. However, there are several challenges that hamper the growth of the industry. These include the high cost of operations and maintenance of gear units. This report covers the market size of industrial gearboxes globally, as well as their manufacturing technologies. It also includes manufacturer data for the period of 2020-2024. The report also features a discussion of market drivers and restraints.
Global health crisis and decreasing seaborne commerce have moderately adverse effects on the industry. Falling seaborne commerce has created a barrier to investment. The value of international crude oil is expected to cross USD 0 by April 2020, putting an end to new assets development and exploitation. In such a scenario, the global gearbox market will face many challenges. However, the opportunities are huge. So, the market for industrial gearboxes is expected to grow by more than 6% by 2020, thanks to the increasing number of light vehicles sold in the country.
The main shaft of a gearbox, also known as the output shaft, spins at different speeds and transfers torque to an automobile. The output shaft is splined so that a coupler and gear can be connected to it. The counter shaft and primary shaft are supported by bearings, which reduce friction in the spinning element. Another important part of a gearbox is the gears, which vary in tooth count. The number of teeth determines how much torque a gear can transfer. In addition, the gears can glide in any position.

China Hot selling Universal Joints cross bearing couplings supply drive agriculture machinery parts tractor gear gearbox post hole digger     agricultural gearbox for sale	China Hot selling Universal Joints cross bearing couplings supply drive agriculture machinery parts tractor gear gearbox post hole digger     agricultural gearbox for sale

China OEM Engineering & Construction Machinery Parts, Agricultural Machinery Parts, Rubber Belt, Shenway 6204 Bearing “Bearing” for Rice Combine Harvesters near me supplier

Solution Description

 Engineering & Design Equipment Components, Agricultural Machinery Parts, Rubber Belt, shenway 6204 bearing “Bearing” for rice combine harvesters
SKF
SKF bearing deep groove ball bearing bearing company 6204 6205  ball bearing  

Engineering & Design Equipment Components, Agricultural Machinery Components, Rubber Belt, shenway 6204 bearing “Bearing” for rice combine harvesters
Ball Bearing Specification:

Engineering & Building Equipment Elements, Agricultural Equipment Areas, Rubber Belt, shenway 6204 bearing “Bearing” for rice mix harvesters
SKF bearing deep groove ball bearing bearing company 6204 6205  ball bearing  

Engineering & Design Machinery Parts, Agricultural Machinery Elements, Rubber Belt, shenway 6204 bearing “Bearing” for rice merge harvesters
SKF bearing deep groove ball bearing bearing maker 6204 6205  ball bearing  

Engineering & Development Machinery Elements, Agricultural Equipment Elements, Rubber Belt, shenway 6204 bearing “Bearing” for rice merge harvesters
SKF bearing deep groove ball bearing bearing producer 6204 6205  ball bearing  

Engineering & Development Machinery Areas, Agricultural Machinery Components, Rubber Belt, shenway 6204 bearing “Bearing” for rice mix harvesters

SKF bearing deep groove ball bearing bearing company 6204 6205  ball bearing  

Seals Types ZZ,Z,2RS,rs,RZ,2RZ,OPEN
Vibration Level Z1V1,Z2V2,Z3V3
Clearance C2,C0,C3,C4,C5
Tolerance Codes ABEC-1,ABEC-3,ABEC-5
Materral GCr15-China/AISI52100-USA/Din100Cr6-Germany
MOQ 1Set at least
Delivery Time 5-10 days after contract
Payment Terms TT/PAPAL/WESTERN UNION
Package Tube package+outer carton+pallets;Single box+outer carton+pallets;
Tube pavkge+middle box+outer carton+pallets;According to your requirement

###

  Bearing Number Boundary dimensions(mm) Basic load ratings(kN) Limiting speeds(rpm) Mass(Kg)
    d D B rs min Cr Cor Grease Oil (Approx.)
62 Series 6200 10 30 9 0.6 5.1 2.39 25,000 30,000 0.032
  6201 12 32 10 0.6 6.1 2.75 22,000 26,000 0.037
  6202 15 35 11 0.6 7.75 3.6 19,000 23,000 0.045
  6203 17 40 12 0.6 9.6 4.6 18,000 21,000 0.066
  6204 20 47 14 1 12.8 6.65 16,000 18,000 0.106
  6205 25 52 15 1 14 7.85 13,000 15,000 0.128
  6206 30 62 16 1 19.5 11.3 11,000 13,000 0.199
  6207 35 72 17 1.1 25.7 15.3 9,800 11,000 0.288
  6208 40 80 18 1.1 29.1 17.8 8,700 10,000 0.366
  6209 45 85 19 1.1 32.5 20.4 7,800 9,200 0.398
  6210 50 90 20 1.1 35 23.2 7,100 8,300 0.454
  6211 55 100 21 1.5 43.5 29.2 6,400 7,600 0.601
  6212 60 110 22 1.5 52.5 36 6,000 7,000 0.783
  6213 65 120 23 1.5 57.5 40 5,500 6,500 0.99
  6214 70 125 24 1.5 62 44 5,100 6,000 1.07
  6215 75 130 25 1.5 66 49.5 4,800 5,600 1.18
  6216 80 140 26 2 72.5 53 4,500 5,300 1.4
  6217 85 150 28 2 83.5 64 4,200 5,000 1.79
  6218 90 160 30 2 96 71.5 4,000 4,700 2.15
  6219 95 170 32 2.1 109 82 3,700 4,400 2.62
  6220 100 180 34 2.1 122 93 3,500 4,200 3.14
  6221 105 190 36 2.1 133 105 3,400 4,000 3.7
  6222 110 200 38 2.1 144 117 3,200 3,800 4.36
  6224 120 215 40 2.1 155 131 2,900 3,400 5.15
  6226 130 230 40 3 167 146 2,700 3,100 5.82
  6228 140 250 42 3 166 150 2,500 2,900 7.57
  6230 150 270 45 3 176 168 2,300 2,700 9.41
  6232 160 290 48 3 185 186 2,100 2,500 11.7
  6234 170 310 52 4 212 223 2,000 2,400 14.5
  6236 180 320 52 4 227 241 1,900 2,200 15.1
  6238 190 340 55 4 255 281 1,800 2,100 18.2
  6240 200 360 58 4 269 310 1,700 2,000 21.6
  6244 220 400 65 4 297 365 1,500 1,800 30.2
  6248 240 440 72 4 358 465 3,000 2,600 53.9
  6252M 260 440 80 5 390 530 2,600 2,400 68.3
  62/22 22 50 14 1 1320 690 14,000 17,000 0.117
  62/28 28 58 16 1 1830 995 12,000 14,000 0.171
  62/32 32 65 17 1 2110 1190 11,000 12,000 0.226
Seals Types ZZ,Z,2RS,rs,RZ,2RZ,OPEN
Vibration Level Z1V1,Z2V2,Z3V3
Clearance C2,C0,C3,C4,C5
Tolerance Codes ABEC-1,ABEC-3,ABEC-5
Materral GCr15-China/AISI52100-USA/Din100Cr6-Germany
MOQ 1Set at least
Delivery Time 5-10 days after contract
Payment Terms TT/PAPAL/WESTERN UNION
Package Tube package+outer carton+pallets;Single box+outer carton+pallets;
Tube pavkge+middle box+outer carton+pallets;According to your requirement

###

  Bearing Number Boundary dimensions(mm) Basic load ratings(kN) Limiting speeds(rpm) Mass(Kg)
    d D B rs min Cr Cor Grease Oil (Approx.)
62 Series 6200 10 30 9 0.6 5.1 2.39 25,000 30,000 0.032
  6201 12 32 10 0.6 6.1 2.75 22,000 26,000 0.037
  6202 15 35 11 0.6 7.75 3.6 19,000 23,000 0.045
  6203 17 40 12 0.6 9.6 4.6 18,000 21,000 0.066
  6204 20 47 14 1 12.8 6.65 16,000 18,000 0.106
  6205 25 52 15 1 14 7.85 13,000 15,000 0.128
  6206 30 62 16 1 19.5 11.3 11,000 13,000 0.199
  6207 35 72 17 1.1 25.7 15.3 9,800 11,000 0.288
  6208 40 80 18 1.1 29.1 17.8 8,700 10,000 0.366
  6209 45 85 19 1.1 32.5 20.4 7,800 9,200 0.398
  6210 50 90 20 1.1 35 23.2 7,100 8,300 0.454
  6211 55 100 21 1.5 43.5 29.2 6,400 7,600 0.601
  6212 60 110 22 1.5 52.5 36 6,000 7,000 0.783
  6213 65 120 23 1.5 57.5 40 5,500 6,500 0.99
  6214 70 125 24 1.5 62 44 5,100 6,000 1.07
  6215 75 130 25 1.5 66 49.5 4,800 5,600 1.18
  6216 80 140 26 2 72.5 53 4,500 5,300 1.4
  6217 85 150 28 2 83.5 64 4,200 5,000 1.79
  6218 90 160 30 2 96 71.5 4,000 4,700 2.15
  6219 95 170 32 2.1 109 82 3,700 4,400 2.62
  6220 100 180 34 2.1 122 93 3,500 4,200 3.14
  6221 105 190 36 2.1 133 105 3,400 4,000 3.7
  6222 110 200 38 2.1 144 117 3,200 3,800 4.36
  6224 120 215 40 2.1 155 131 2,900 3,400 5.15
  6226 130 230 40 3 167 146 2,700 3,100 5.82
  6228 140 250 42 3 166 150 2,500 2,900 7.57
  6230 150 270 45 3 176 168 2,300 2,700 9.41
  6232 160 290 48 3 185 186 2,100 2,500 11.7
  6234 170 310 52 4 212 223 2,000 2,400 14.5
  6236 180 320 52 4 227 241 1,900 2,200 15.1
  6238 190 340 55 4 255 281 1,800 2,100 18.2
  6240 200 360 58 4 269 310 1,700 2,000 21.6
  6244 220 400 65 4 297 365 1,500 1,800 30.2
  6248 240 440 72 4 358 465 3,000 2,600 53.9
  6252M 260 440 80 5 390 530 2,600 2,400 68.3
  62/22 22 50 14 1 1320 690 14,000 17,000 0.117
  62/28 28 58 16 1 1830 995 12,000 14,000 0.171
  62/32 32 65 17 1 2110 1190 11,000 12,000 0.226

What is a pulley?

Pulleys are shafts or wheels on a shaft that support the movement and change of direction of a taut cable. The pulley also transfers power from the shaft to the cable. A simple pulley is used to raise the school flag. Read on to learn about the basic types of pulleys. We also covered the use of pulleys in everyday life. Read on to learn more about this important mechanical part.
pulley

composite pulley

A composite pulley is a mechanical system where two or more pulleys and ropes are connected together. It reduces the force required to lift the load because the force is divided by the distance of each pulley. Distance is equal to the mass of the object. Composite pulleys are a common mechanical system on sailboats. Composite pulleys can be used to lift heavy equipment such as sails.
The compound pulley unit consists of two pulleys, one fixed and the other movable. The fixed pulley is fixed overhead, while the movable pulley is connected to the load by a chain. The lift applies force to the other end of the rope. Anchor points are attached to fixed joists, ceiling joists or sturdy branches. The chain should be long enough to support the load during lifting.
Composite pulleys can be made from a variety of materials. Some are fixed and remain fixed. Others are detachable. The composite pulley combines the advantages of both types, making it a versatile tool. In the table below, these three types of pulleys are compared. It’s easy to see which one is best for your needs. The right choice depends on your specific needs and budget.
The compound pulley system consists of two fixed pulleys and one movable pulley. The compound pulley system multiplies the force by a factor of 2. The compound pulley system is particularly suitable for heavy loads and is ideal for construction sites. Workers apply less than half the load force on the composite pulley, significantly reducing the force required. This is a major benefit for many people.

Fixed pulley

Fixed pulleys are fixed gears of fixed length that are mounted on solid objects. There are many different types of pulley systems. Some cooperate with each other, but not “fixed”.
Fixed pulleys can be used for a variety of purposes. One application is to lift small objects. They have a one-to-one mechanical advantage. Often, a single pulley can lift small loads. The force required to lift a single fixed pulley remains the same. They are usually used to lift lighter objects. They can even be attached to buckets used to draw water from wells.
While single fixed pulleys have desirable mechanical advantages, they are not suitable for force multipliers. Because their mechanical advantage diminishes over time, they are not effective force multipliers. They are used to redirect work so that it can be applied in the most convenient direction. This mechanical advantage is the main advantage of fixed pulleys and the most common way of moving objects. They have several benefits, including the ability to increase the speed of moving objects.
Another application for fixed pulleys is lifting supplies. A scaffold can weigh more than one and can be directly hoisted. In order to facilitate the transportation of materials, fixed pulleys are usually installed on the top of the scaffolding on construction sites. Then thread the rope through the edge of the groove that holds the pulley. The fixed pulley exerts the same force on the pull side as on the push side. The same is true for moving objects with fixed pulleys.
pulley

moving pulley

A movable pulley is a device whose part is fixed to another object, usually a rod or beam. The movable part moves with the load, making the load feel lighter. This is a useful tool for those who need to carry heavy items such as large bags. The advantages of moving pulleys are many. Here are some of them. Read on to learn more about them.
One of the most common uses of movable pulley systems is climbing high objects. Climbers act as pulley loads and pull ropes to lift objects. Eventually, when the traction stops, the climber descends. However, it is still a useful tool in other situations. The movable pulley system can help you climb the tallest objects or lift them to level surfaces.
Another example of movable pulleys is in industry. Depending on the load, movable pulleys make handling and moving loads easier. You can use them in a variety of applications in manufacturing and industry, including cleaning. For example, the American flag is raised and lowered every day. Removable pulleys are a handy tool when buildings need cleaning.
If you’re not sure whether a task requires a pulley, a zipline might be a good option. Connect the two ends of the rope and the pulley will move along the rope, then attach the rope to the metal cable. The load is the person holding the pulley, and the force comes from the attachment on the other end of the rope. There are two types of live pulleys: simple pulleys with just one wheel and live pulleys with many ropes attached.

School flag raised with simple pulleys

How is the school flag raised? It is pulled up by a rope attached to a pulley at the top of the pole. When the rope is pulled, the pulley turns, raising the flag. A pulley is a simple mechanism that helps people move heavier objects with ease. The rope must be securely attached to the pulley to keep the flag stable.
A simple pulley is a spinning wheel with grooves on one side and ropes on the other. The rope can be any length and the wheels can be any size. The rope has to go through the groove and the load is attached to the other end of the rope. Simple pulleys are pulleys with fixed shafts. An example is the wheel on a school flagpole.
A simple pulley system consists of a primary pole, a secondary pole and an outer member. The primary flagpole is connected to the track by a detour, while the secondary flagpole is connected to the track by a pipe. There is a groove on one side of the track, which passes through the inner cavity of the flagpole. An open track at the upper end of the track connects the two parts of the pulley.
A simple pulley can be used for many purposes. This is a useful machine that can be used to raise the flag. Among other things, it can be used in clothing lines, bird feeders, and even roofers. And, of course, you can use the pulley to raise the flag. Its versatility makes it an essential part of school decor.
pulley

cast iron pulley

If you are looking for pulleys for your machine, you may come across cast iron pulleys. They are usually cheap and available in a variety of sizes. The rim is held in place by a mesh attached to a central boss. The arms and spokes can be straight or curved, but most are oval. There are many uses for this type of pulley.
You might wonder why the arms of cast iron pulleys are so curved. Bent arms tend to yield rather than break. Cast iron pulleys are usually round with a slight bump on the rim, which helps keep the belt centered on the rim as it moves. On a 300mm diameter pulley, the bumps may be as small as 9mm.