China factory Manufacturer direct sales High Precision Flanged bearing unit UCF208  Pillow Blocks /Bearing House/Units Agricultural Machinery parts with Great quality

Product Description

Product Description

The TANN mounted bearing units is a bearing which combines the spherical outside surface ball bearing, seal, and a housing of high-grade cast iron or pressed steel. It features a variety of structure patterns, and is suitable for application under tough conditions.

Product Parameters

Square flange unit  – Standard duty
Set screw type
Unit No. Dimensions (mm / inch) Bolt Size mm inch Bearing No. Housing No. Weight (kg)
d a e i g i s z t B n
UCF201 12 86 64 25.5 12 25.5 12 33.3 37.5 31 12.7 M10 UC201 F203 0.60 
UCF201-8 1/2 3-3/8 2-33/64 1 15/32 1 15/32 1-5/16 1-31/64 1.2205 0.5 3/8 UC201-8 0.59 
UCF202 15 86 64 25.5 12 25.5 12 33.3 37.5 31 12.7 M10 UC202 F203 0.59 
UCF202-9 9/16 3-3/8 2-33/64 1 15/32 1 15/32 1-5/16 1-31/64 1.2205 0.5 3/8 UC202-9 0.59 
UCF202-10 5/8 UC202-10 0.59 
UCF203 17 86 64 25.5 12 25.5 12 33.3 37.5 31 12.7 M10 UC203 F203 0.58 
UCF203-11 11/16 3-3/8 2-33/64 1 15/32 1 15/32 1-5/16 1-31/64 1.2205 0.5 3/8 UC203-11 0.57 
UCF204 20 86 64 25.5 12 25.5 12 33.3 37.5 31 12.7 M10 UC204 F204 0.56 
UCF204-12 3/4 3-3/8 2-33/64 1 15/32 1 15/32 1-5/16 1-31/64 1.2205 0.5 3/8 UC204-12 0.56 
UCF205 25 95 70 27 14 27 12 35.8 40 34.1 14.3 M10 UC205 F205 0.80 
UCF205-13 13/16 3-3/4 2-3/4 1-1/16 35/64 1-1/16 15/32 1-13/32 37150 1.3425 0.563 3/8 UC205-13 0.84 
UCF205-14 7/8 UC205-14 0.83 
UCF205-15 15/16 UC205-15 0.81 
UCF205-16 1 UC205-16 0.80 
UCF206 30 108 83 31 14 31 12 40.2 44.5 38.1 15.9 M10 UC206 F206 1.12 
UCF206-17 1-1/16 4-1/4 3-17/64 1-7/32 35/64 1-7/32 15/32 1-19/32 36954 1.5 0.626 3/8 UC206-17 1.15 
UCF206-18 1-1/8 UC206-18 1.14 
UCF206-19 1-3/16 UC206-19 1.12 
UCF206-20 1-1/4 UC206-20 1.11 
UCF207 35 117 92 34 16 34 14 44.4 48.5 42.9 17.5 M12 UC207 F207 1.46 
UCF207-20 1-1/4 4-39/64 3-5/8 1-11/32 5/8 1-11/32 35/64 1-3/4 1-29/32 1.689 0.689 7/16 UC207-20 1.52 
UCF207-21 1-5/16 UC207-21 1.49 
UCF207-22 1-3/8 UC207-22 1.46 
UCF207-23 1-7/16 UC207-23 1.43 
UCF208 40 130 102 36 16 36 16 51.2 55.5 49.2 19 M14 UC208 F208 1.84 
UCF208-24 1-1/2 5-1/8 4-1/64 1-27/64 5/8 1-27/64 5/8 2-1/64 37331 1.937 0.748 1/2 UC208-24 1.88 
UCF208-25 1-9/16 UC208-25 1.85 
UCF209 45 137 105 38 18 38 16 52.2 56.5 49.2 19 M14 UC209 F209 2.15 
UCF209-26 1-5/8 5-13/32 4-9/64 1-1/2 23/32 1-1/2 5/8 2-1/16 2-7/32 1.937 0.748 1/2 UC209-26 2.25 
UCF209-27 1-11/16 UC209-27 2.21 
UCF209-28 1-3/4 UC209-28 2.17 
UCF210 50 143 111 40 18 40 16 54.6 59.5 51.6 19 M14 UC210 F210 2.42 
UCF210-29 1-13/16 5-5/8 4-3/8 1-9/16 23/32 1-9/16 5/8 2-5/32 2-11/32 2.571 0.748 1/2 UC210-29 2.54 
UCF210-30 1-7/8 UC210-30 2.49 
UCF210-31 1-15/16 UC210-31 2.44 
UCF210-32 2 UC210-32 2.40 
UCF211 55 162 130 43 20 43 19 58.4 63 55.6 22.2 M16 UC211 F211 3.31 
UCF211-32 2 6-3/8 5-1/8 1-11/16 25/32 1-11/16 3/4 2-5/16 2-31/64 2.189 0.874 5/8 UC211-32 3.46 
UCF211-33 2-1/16 UC211-33 3.40 
UCF211-34 2-1/8 UC211-34 3.35 
UCF211-35 2-3/16 UC211-35 3.29 
UCF212 60 175 143 48 20 48 19 68.7 73.5 65.1 25.4 M16 UC212 F212 4.28 
UCF212-36 2-1/4 6-57/64 5-5/8 1-57/64 25/32 1-57/64 3/4 2-45/64 2-57/64 2.563 1 5/8 UC212-36 4.41 
UCF212-37 2-5/16 UC212-37 4.33 
UCF212-38 2-3/8 UC212-38 4.26 
UCF212-39 2-7/16 UC212-39 4.19 
UCF213 65 187 149 50 22 50 19 69.7 74.5 65.1 25.4 M16 UC213 F213 4.99 
UCF213-40 2-1/2 7-23/64 5-55/64 1-31/32 55/64 1-31/32 3/4 2-3/4 2-15/16 2.563 1 5/8 UC213-40 5.08 
UCF213-41 2-9/16 UC213-41 4.99 
UCF214 70 193 152 54 22 54 19 75.4 81.5 74.6 30.2 M16 UC214 F214 5.85 
UCF214-42 2-5/8 7-19/32 5-63/64 2-1/8 55/64 2-1/8 3/4 2-31/32 3-13/64 2.937 1.189 5/8 UC214-42 6.06 
UCF214-43 2-11/16 UC214-43 5.96 
UCF214-44 2-3/4 UC214-44 5.86 
UCF215 75 200 159 56 22 56 19 78.5 83.5 77.8 33.3 M16 UC215 F215 6.91 
UCF215-45 2-13/16 7-7/8 6-17/64 2-7/32 55/64 2-7/32 3/4 3-3/32 3-9/32 3.063 1.311 5/8 UC215-45 7.16 
UCF215-46 2-7/8 UC215-46 7.05 
UCF215-47 2-15/16 UC215-47 6.94 
UCF215-48 3 UC215-48 6.82 
UCF216 80 208 165 58 22 58 23 83.3 88.5 82.6 33.3 M20 UC216 F216 7.50 
UCF216-49 3-1/16 8-3/16 6-1/2 2-9/32 55/64 2-9/32 29/32 3-9/32 3-31/64 3.252 1.311 3/4 UC216-49 7.68 
UCF216-50 3-1/8 UC21S-50 7.55 
UCF216-51 3-3/16 UC216-51 7.42 
UCF217 85 220 175 63 24 63 23 87.6 92.6 85.7 34.1 M20 UC217 F217 9.66 
UCF217-52 3-1/4 8-21/23 6-57/64 2-15/32 15/16 2-15/32 29/32 3-7/16 3-41/64 3.374 1.343 3/4 UC217-52 9.88 
UCF217-53 3-5/16 UC217-53 9.74 
UCF217-55 3-7/16 UC217-55 9.45 
UCF218 90 235 187 68 24 68 23 96.3 101.5 96 39.7 M20 UC218 F218 12.06 
UCF218-56 3-1/2 9-1/4 7-23/64 2-11/16 15/16 2-11/16 29/32 3-25/32 4       3.7795 1.563 3/4 UC218-56 12.17 


More Choices

Our main product ranges are ball bearings and full ranges of mounted bearing units, including 60 series, 62series, 63 series; thin-wall bearing such as 68 series and 69 series, and also flange bearings, inch bearings, high precision angular contact bearing; UC/UCP/UCF/UCFL/UCT, etc. Non-standard bearings based on customer’s demand are available too.

Wide range of products from strong supplying supplying chains to make suitable solution.

Advantage Products




Rational self- alignment
Larger load carrying capacity, relubrucable, longer service life of the units
Efficient, sealing ability of the units with covers is perfect
Solid housing, provide max rigidty against deformation for any condition
Easy and positive locking to shaft
Special heat-treatment on bearing inner ring prevent causing cracking
Unique device to prevent bearing outer ring rotation
Complete interchangeability between bearing and housing 
Easy installlation
Easy positioning for mounting


Agriculture Mining
Engineering Chemical machinery
Textile Plastic
Dyeing and fining Other industries

Company Profile

About Us

Focus on a variety of industries
Provide maintenance solutions
Optimize customer inventory and reduce cost

Established in 2012, HangZhou Granville is a branch of the Granville Group. With our experience, competitive prices and excellent service, we have won the praise of our customers. Our business involves standard and special industrial parts, automotive parts and construction machinery parts required for a variety of different industrial applications.
Our main products include
Bearing series :
ball bearings, deep groove ball bearings, self-aligning ball bearings, angularcontact ball bearings, cylindrical roller bearing, tapered roller bearings, thrust ball bearings, thrust rollerbearings, needle bearings, spherical bearings, joint bearings, pillow blocks, linear bearings, etc.
Accessories series:Automotive Spare Parts,Seals & O-rings ,Power transmission parts Chain and Sprocket
Our products are mainly exported to Europe, America, Middle East, Southeast Asia, India, Pakistan, Bangladesh, Singapore, Korea and other countries around the world. We have a large number of products in stock, which can be delivered with high efficiency in the shortest possible time to solve your matching problems in time. In addition, we have reliable quality and quantity of products to offer. We adhere to the principle of win-win situation and insist on “providing comprehensive quality products and best reputation” to provide excellent services to our customers.

What We Do

Comprehensive product range:
– Bearings
– Oil seals, Transmission belt
– Chain and Sprocket
– Hub assembly & Wheel bearings
– Coupling, castings
– Linear motion

Packaging & Shipping


Our Advantages

1. We have the most advanced bearing process equipment, CNC automatic facilities, and testing instruments.
2. We manufacture ball bearings and mounted bearing units, and also provide a strong full range of products, including electric motors and components One-stop partnerships products from our audited supply chain.
3. All products are manufactured exclusively by companies with ISO 9001:2008 certified Quality Systems which use state-of-the-art machines. The quality path starts from the beginning to deliver and goods’ quality trackable

Our Values
Behavior-based, service-oriented, focused on results and committed to continuous improvement

Advantage Manufacturing Processes and Quality Control:

01Heat Treatment
02 Centerless Grinding Machine 11200 (most advanced)
03 Automatic Production Lines for Raceway
04 Automatic Production Lines for Raceway
05 Ultrasonic Cleaning of Rings
06 Automatic Assembly
07 Ultrasonic Cleaning of Bearings
08 Automatic Greasing, Seals Pressing
09Measurement of Bearing Vibration (Acceleration)
10 Measurement of Bearing Vibration (Speed)
11 Laser Marking
12 Automatic Packing

After Sales Service

  1. Optimize customer inventory and reduce cost
  2. Provide maintenance solutions

Quality Warranty

Granville as a manufacturer of high quality products, guarantees compliance with the highest standards relative to the use of the best steel quality in the production process, the highest standards in the design of contact surfaces, as well as the most efficient packing and lubrication of parts. From material coming, quality control through all processes. Except interal test, goods to third party inspection if required. After the center of inspection and experiment being founded, effective methods of inspecting all kinds of raw materials are mastered and then the reliability of bearings is ensured. One of our main objectives is the continued improvement in the quality of our products and processes, in pursuit of which we obtained ISO certification 9001:2008 and TS16949. 


Q1.Can you accept OEM and customization?

A: Yes. We can customize it according to the samples and drawings you provide.

Q2.Do you keep a stock of these things?
A: In stocks

Q3.Can you provide samples free of charge?
A: Yes. We can provide samples free of charge. But the freight is paid by the customer.

Q4.What’s the delivery date?
A: The delivery time of sample orders is 3 working days.The bulk orders are 5-10 working days.

Q5: Why your price is higher than others?
A: Price = quality . We firmly believe that by the quality of the customer is always get more reliable than on price . So we insist on doing high-quality products.

Q6:What kind of transport do you have ?
A: According to the weight,we will choose the most appropriate mode of transport for you. Our freight forwarding is efficient and cheap

How to Calculate the Diameter of a Worm Gear

worm shaft
In this article, we will discuss the characteristics of the Duplex, Single-throated, and Undercut worm gears and the analysis of worm shaft deflection. Besides that, we will explore how the diameter of a worm gear is calculated. If you have any doubt about the function of a worm gear, you can refer to the table below. Also, keep in mind that a worm gear has several important parameters which determine its working.

Duplex worm gear

A duplex worm gear set is distinguished by its ability to maintain precise angles and high gear ratios. The backlash of the gearing can be readjusted several times. The axial position of the worm shaft can be determined by adjusting screws on the housing cover. This feature allows for low backlash engagement of the worm tooth pitch with the worm gear. This feature is especially beneficial when backlash is a critical factor when selecting gears.
The standard worm gear shaft requires less lubrication than its dual counterpart. Worm gears are difficult to lubricate because they are sliding rather than rotating. They also have fewer moving parts and fewer points of failure. The disadvantage of a worm gear is that you cannot reverse the direction of power due to friction between the worm and the wheel. Because of this, they are best used in machines that operate at low speeds.
Worm wheels have teeth that form a helix. This helix produces axial thrust forces, depending on the hand of the helix and the direction of rotation. To handle these forces, the worms should be mounted securely using dowel pins, step shafts, and dowel pins. To prevent the worm from shifting, the worm wheel axis must be aligned with the center of the worm wheel’s face width.
The backlash of the CZPT duplex worm gear is adjustable. By shifting the worm axially, the section of the worm with the desired tooth thickness is in contact with the wheel. As a result, the backlash is adjustable. Worm gears are an excellent choice for rotary tables, high-precision reversing applications, and ultra-low-backlash gearboxes. Axial shift backlash is a major advantage of duplex worm gears, and this feature translates into a simple and fast assembly process.
When choosing a gear set, the size and lubrication process will be crucial. If you’re not careful, you might end up with a damaged gear or 1 with improper backlash. Luckily, there are some simple ways to maintain the proper tooth contact and backlash of your worm gears, ensuring long-term reliability and performance. As with any gear set, proper lubrication will ensure your worm gears last for years to come.
worm shaft

Single-throated worm gear

Worm gears mesh by sliding and rolling motions, but sliding contact dominates at high reduction ratios. Worm gears’ efficiency is limited by the friction and heat generated during sliding, so lubrication is necessary to maintain optimal efficiency. The worm and gear are usually made of dissimilar metals, such as phosphor-bronze or hardened steel. MC nylon, a synthetic engineering plastic, is often used for the shaft.
Worm gears are highly efficient in transmission of power and are adaptable to various types of machinery and devices. Their low output speed and high torque make them a popular choice for power transmission. A single-throated worm gear is easy to assemble and lock. A double-throated worm gear requires 2 shafts, 1 for each worm gear. Both styles are efficient in high-torque applications.
Worm gears are widely used in power transmission applications because of their low speed and compact design. A numerical model was developed to calculate the quasi-static load sharing between gears and mating surfaces. The influence coefficient method allows fast computing of the deformation of the gear surface and local contact of the mating surfaces. The resultant analysis shows that a single-throated worm gear can reduce the amount of energy required to drive an electric motor.
In addition to the wear caused by friction, a worm wheel can experience additional wear. Because the worm wheel is softer than the worm, most of the wear occurs on the wheel. In fact, the number of teeth on a worm wheel should not match its thread count. A single-throated worm gear shaft can increase the efficiency of a machine by as much as 35%. In addition, it can lower the cost of running.
A worm gear is used when the diametrical pitch of the worm wheel and worm gear are the same. If the diametrical pitch of both gears is the same, the 2 worms will mesh properly. In addition, the worm wheel and worm will be attached to each other with a set screw. This screw is inserted into the hub and then secured with a locknut.

Undercut worm gear

Undercut worm gears have a cylindrical shaft, and their teeth are shaped in an evolution-like pattern. Worms are made of a hardened cemented metal, 16MnCr5. The number of gear teeth is determined by the pressure angle at the zero gearing correction. The teeth are convex in normal and centre-line sections. The diameter of the worm is determined by the worm’s tangential profile, d1. Undercut worm gears are used when the number of teeth in the cylinder is large, and when the shaft is rigid enough to resist excessive load.
The center-line distance of the worm gears is the distance from the worm centre to the outer diameter. This distance affects the worm’s deflection and its safety. Enter a specific value for the bearing distance. Then, the software proposes a range of suitable solutions based on the number of teeth and the module. The table of solutions contains various options, and the selected variant is transferred to the main calculation.
A pressure-angle-angle-compensated worm can be manufactured using single-pointed lathe tools or end mills. The worm’s diameter and depth are influenced by the cutter used. In addition, the diameter of the grinding wheel determines the profile of the worm. If the worm is cut too deep, it will result in undercutting. Despite the undercutting risk, the design of worm gearing is flexible and allows considerable freedom.
The reduction ratio of a worm gear is massive. With only a little effort, the worm gear can significantly reduce speed and torque. In contrast, conventional gear sets need to make multiple reductions to get the same reduction level. Worm gears also have several disadvantages. Worm gears can’t reverse the direction of power because the friction between the worm and the wheel makes this impossible. The worm gear can’t reverse the direction of power, but the worm moves from 1 direction to another.
The process of undercutting is closely related to the profile of the worm. The worm’s profile will vary depending on the worm diameter, lead angle, and grinding wheel diameter. The worm’s profile will change if the generating process has removed material from the tooth base. A small undercut reduces tooth strength and reduces contact. For smaller gears, a minimum of 14-1/2degPA gears should be used.
worm shaft

Analysis of worm shaft deflection

To analyze the worm shaft deflection, we first derived its maximum deflection value. The deflection is calculated using the Euler-Bernoulli method and Timoshenko shear deformation. Then, we calculated the moment of inertia and the area of the transverse section using CAD software. In our analysis, we used the results of the test to compare the resulting parameters with the theoretical ones.
We can use the resulting centre-line distance and worm gear tooth profiles to calculate the required worm deflection. Using these values, we can use the worm gear deflection analysis to ensure the correct bearing size and worm gear teeth. Once we have these values, we can transfer them to the main calculation. Then, we can calculate the worm deflection and its safety. Then, we enter the values into the appropriate tables, and the resulting solutions are automatically transferred into the main calculation. However, we have to keep in mind that the deflection value will not be considered safe if it is larger than the worm gear’s outer diameter.
We use a four-stage process for investigating worm shaft deflection. We first apply the finite element method to compute the deflection and compare the simulation results with the experimentally tested worm shafts. Finally, we perform parameter studies with 15 worm gear toothings without considering the shaft geometry. This step is the first of 4 stages of the investigation. Once we have calculated the deflection, we can use the simulation results to determine the parameters needed to optimize the design.
Using a calculation system to calculate worm shaft deflection, we can determine the efficiency of worm gears. There are several parameters to optimize gearing efficiency, including material and geometry, and lubricant. In addition, we can reduce the bearing losses, which are caused by bearing failures. We can also identify the supporting method for the worm shafts in the options menu. The theoretical section provides further information.

China factory Manufacturer direct sales High Precision Flanged bearing unit UCF208  Pillow Blocks /Bearing House/Units Agricultural Machinery parts     with Great qualityChina factory Manufacturer direct sales High Precision Flanged bearing unit UCF208  Pillow Blocks /Bearing House/Units Agricultural Machinery parts     with Great quality

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