Inch Linear Ball Bearing Case Unit

Our inch linear ball bearing housings offer three configurations: the standard type for smooth, compact precision; the adjustable type for tuning clearance under heavy loads; and the open type for accommodating supported shafts and deflection.

Description

This series of inch linear ball bearing case unit is engineered for precision linear motion systems and comes in three versatile configurations to meet diverse operational needs. The standard type features a fully enclosed cylindrical design with high-precision balls, delivering smooth operation and minimal friction for compact spaces requiring high rigidity. The clearance adjustable type incorporates an axial slit that allows for precise internal gap tuning via locking bolts, effectively compensating for installation errors and ensuring zero-backlash stability under heavy loads. Finally, the open type is axially split to pair seamlessly with supported shafts, making it ideal for applications involving shaft deflection or where frequent clearance adjustments and high torque loads are required.

Technical Specifications:

TWA Series

Major Dimensions(mm) Mounting Dimensions (mm) Basic load rating
Norminal
part No.
Norminal
shaft
diameter
h E w L F T G M B C K S dynamic
C(N)
Static
Co(N)
Weight
g
inch inch inch inch inch inch inch inch inch inch inch inch inch ibf ibf ibf
TWA4UU 1/4 0.473 0.8125 1.625 1.188 0.813 0.188 0.75 1 1.312 0.75 0.156 0.156 60 80 0.09
TWA6UU 3/8 0.5 0.875 1.75 1.313 0.938 0.188 0.875 1.125 1.437 0.875 0.156 0.156 95 120 0.12
TWA8UU 1/2 0.687 1 2 1.688 1.25 0.25 1.125 1.375 1.688 1 0.156 0.156 230 290 0.248
TWA10UU 5/8 0.875 1.25 2.5 1.938 1.625 0.281 1.437 1.75 2.125 1.125 0.188 0.188 400 500 0.465
TWA12UU 3/4 0.937 1.375 2.75 2.063 1.75 313 1.563 1.875 2.375 1.25 0.188 0.188 470 590 0.553
TWA16UU 1 1.187 1.625 3.25 2.813 2.188 0.375 1.938 2.375 2.875 1.75 0.188 0.219 850 1060 1.2
TWA20UU 1-1/4 1.5 2 4 3.625 2.813 0.438 2.5 3 3.5 2 0.25 0.219 1230 1530 2.38
TWA24UU 1-1/2 1.75 2.375 4.75 4 3.25 0.5 2.875 3.5 2.5 2.5 0.313 0.313 1480 1850 3.46
TWA32UU 2 2.125 3 6 5 4.063 625 3.625 4.5 3.25 3.25 0.375 0.375 2430 3040 6.83

TWA-W Series

Major Dimensions(mm) Mounting Dimensions (mm) Basic load rating
Norminal
part No.
Norminal
shaft
diameter
h E w L F T G M B C K S dynamic
C(N)
Static
Co(N)
Weight
g
inch inch inch inch inch inch inch inch inch inch inch inch inch ibf ibf ibf
TWA4WUU 1/4 0.473 0.8125 1.625 2.5 0.813 0.188 0.75 1 1.312 2 0.156 0.156 96 160 0.19
TWA6WUU 3/8 0.5 0.875 1.75 2.75 0.938 0.188 0.875 1.125 1.437 2.25 0.156 0.156 150 240 0.25
TWA8WUU 1/2 0.687 1 2 3.5 1.25 0.25 1.125 1.375 1.688 2.5 0.156 0.156 370 580 0.51
TWA10WUU 5/8 0.875 1.25 2.5 4 1.625 0.281 1.437 1.75 2.125 3 0.188 0.188 640 1000 1
TWA12WUU 3/4 0.937 1.375 2.75 4.5 1.75 313 1.563 1.875 2.375 3.5 0.188 0.188 750 1180 1.2
TWA16WUU 1 1.187 1.625 3.25 6 2.188 0.375 1.938 2.375 2.875 4.5 0.188 0.219 1360 2120 2.4
TWA20WUU 1-1/4 1.5 2 4 7.5 2.813 0.438 2.5 3 3.5 5.5 0.25 0.219 1970 3060 5
TWA24WUU 1-1/2 1.75 2.375 4.75 9 3.25 0.5 2.875 3.5 4.125 6.5 0.313 0.281 2370 3700 7.8

TWJ Series Adjustable Type

Major Dimensions(mm) Mounting Dimensions (mm) Basic load rating
Norminal
part No.
Norminal
shaft
diameter
h E w L F T G M B C K S dynamic
C(N)
Static
Co(N)
Weight
g
inch inch inch inch inch inch inch inch inch inch inch inch inch ibf ibf ibf
TWJ4UU 1/4 0.4730 0.8125 1.625 1.188 0.813 0.188 0.750 1.000 1.312 0.750 0.156 0.156 60 80 0.090
TWJ6UU 3/8 0.5000 0.8750 1.750 1.313 0.938 0.188 0.875 1.125 1.437 0.875 0.156 0.156 95 120 0.120
TWJ8UU 1/2 0.6870 1.0000 2.000 1.688 1.250 0.250 1.125 1.375 1.688 1.000 0.156 0.156 230 290 0.248
TWJ10UU 5/8 0.8750 1.2500 2.500 1.938 1.625 0.281 1.437 1.750 2.125 1.125 0.188 0.188 400 500 0.465
TWJ12UU 3/4 0.9370 1.3750 2.750 2.063 1.750 313 1.563 1.875 2.375 1.250 0.188 0.188 470 590 0.553
TWJ16UU 1 1.1870 1.6250 3.250 2.813 2.188 0.375 1.938 2.375 2.875 1.750 0.188 0.219 850 1060 1.200
TWJ20UU 1-1/4 1.5000 2.0000 4.000 3.625 2.813 0.438 2.500 3.000 3.500 2.000 0.250 0.219 1230 1530 2.380
TWJ24UU 1-1/2 1.7500 2.3750 4.750 4.000 3.250 0.500 2.875 3.500 4.125 2.500 0.313 0.281 1480 1850 3.460
TWJ32UU 2 2.1250 3.0000 6.000 5.000 4.063 625 3.625 4.500 5.250 3.250 0.375 0.406 2430 3040 6.830

TWJ-W Series Adjustable Type

Major Dimensions(mm) Mounting Dimensions (mm) Basic load rating
Norminal
part No.
Norminal
shaft
diameter
h E w L F T G M B C K S dynamic
C(N)
Static
Co(N)
Weight
g
inch inch inch inch inch inch inch inch inch inch inch inch inch ibf ibf ibf
TWJ4WUU 1/4 0.4730 0.8125 1.625 2.500 0.813 0.188 0.750 1.000 1.312 2.000 0.156 0.156 96 160 0.190
TWJ6WUU 3/8 0.5000 0.8750 1.750 2.750 0.938 0.188 0.875 1.125 1.437 2.250 0.156 0.156 150 240 0.250
TWJ8WUU 1/2 0.6870 1.0000 2.000 3.500 1.250 0.250 1.125 1.375 1.688 2.500 0.156 0.156 370 580 0.510
TWJ10WUU 5/8 0.8750 1.2500 2.500 4.000 1.625 0.281 1.437 1.750 2.125 3.000 0.188 0.188 640 1000 1.000
TWJ12WUU 3/4 0.9370 1.3750 2.750 4.500 1.750 313 1.563 1.875 2.375 3.500 0.188 0.188 750 1180 1.200
TWJ16WUU 1 1.1870 1.6250 3.250 6.000 2.188 0.375 1.938 2.375 2.875 4.500 0.188 0.219 1360 2120 2.400
TWJ20WUU 1-1/4 1.5000 2.0000 4.000 7.500 2.813 0.438 2.500 3.000 3.500 5.500 0.250 0.219 1970 3060 5.000
TWJ24WUU 1-1/2 1.7500 2.3750 4.750 9.000 3.250 0.500 2.875 3.500 4.125 6.500 0.313 0.281 2370 3700 7.800

TWD Series Open Type

Major Dimensions(mm) Mounting Dimensions (mm) Basic load rating
Norminal
part No.
Norminal
shaft
diameter
h E w L F T G M hi B C K S dynamic
C(N)
Static
Co(N)
Weight
g
inch inch inch inch inch inch inch inch inch inch inch inch inch inch ibf ibf ibf
TWD8UU 1/2 0.6870 1.0000 2.000 1.500 1.100 0.250 0.688 0.86 0.260 1.688 1.000 0.156 0.156 230 290 0.188
TWD10UU 5/8 0.8750 1.2500 2.500 1.750 1.405 0.281 0.875 1.06 0.319 2.125 1.125 0.188 0.188 400 500 0.365
TWD12UU 3/4 0.9370 1.3750 2.750 1.875 1.535 0. 315 0.937 1.12 0.389 2.375 1.250 0.188 0.188 470 590 0.452
TWD16UU 1 1.1870 1.6250 3.250 2.625 1.975 0.375 1.188 1.4 0.512 2.875 1.750 0.188 0.218 850 1060 1.010
TWD20UU 1-1/4 1.5000 2.0000 4.000 3.375 2.485 0.437 1.500 1.88 0.596 3.500 2.000 0.250 0.218 1230 1530 1.980
TWD24UU 1-1/2 1.7500 2.3750 4.750 3.750 2.910 0.500 1.750 2.12 0.681 4.125 2.500 0.313 0.281 1480 1850 2.950
TWD32UU 2 2.1250 3.0000 6.000 4.750 3.660 0.625 2.250 2.7 0.933 5.250 3.250 0.375 0.406 2430 3040 5.840

TWD-W Series Open Type

Major Dimensions(mm) Mounting Dimensions (mm) Basic load rating
Norminal
part No.
Norminal
shaft
diameter
h E w L F T G M hi B C K S dynamic
C(N)
Static
Co(N)
Weight
g
inch inch inch inch inch inch inch inch inch inch inch inch inch inch ibf ibf ibf
TWD8WUU 1/2 0.6870 1.0000 2.000 3.500 1.100 0.250 0.688 0.86 0.260 1.688 2.500 0.156 0.156 370 580 0.400
TWD10WUU 5/8 0.8750 1.2500 2.500 4.000 1.405 0.281 0.875 1.06 0.319 2.125 3.000 0.188 0.188 640 1000 0.800
TWD12WUU 3/4 0.9370 1.3750 2.750 4.500 1.535 0.315 0.937 1.12 0.389 2.375 3.500 0.188 0.188 750 1180 1.000
TWD16WUU 1 1.1870 1.6250 3.250 6.000 1.975 0.375 1.188 1.4 0.512 2.875 4.500 0.188 0.218 1360 2120 2.000
TWD20WUU 1-1/4 1.5000 2.0000 4.000 7.500 2.485 0.437 1.500 1.88 0.596 3.500 5.500 0.250 0.218 1970 3060 4.200
TWD24WUU 1-1/2 1.7500 2.3750 4.750 9.000 2.910 0.500 1.750 2.12 0.681 4.125 6.500 0.313 0.281 2370 3700 6.700

 

Packing&Shipping & Delivery

china Packing Shipping Delivery

Packing Shipping Delivery

Chains package: First we will use carton package the chains--------then put in wooden box.
We also can custom color package according to your demand
Company Profile
Company Profile
FAQ

How to choose power transmissions parts and industrial products which meet our requirement

Chains Sprockets Pulleys Timing belt Pulley V-belt Pulley
Sheaves Coupings Bush &Hub Gear& Rack V-Belt
Locking Assembly Pulley Gearbox Reducer Shaft Collar
Rod End Bearing Clevis PTO Chain Guide Belt Guide
Rubber Buffer Chain Tensioner PTO Drive Shafts Universal Joints Roller Chains
Conveyor Chains V-Belts Worm Gearbox Helical Gear Worm
Agricultural Chain CNC Proces Parts Casting Stamping
Powder Metallurgy CNC Proces Parts Casting Stamping

What Products Do you sell ? 

We  are a group of factories, give customer one stop solution of power transmission and industrial products. We are in the position to supply wide range of products, including chains, sprockets, v-belt and v-belt pulleys, timing belt and timing belt pulleys, gears, speed reducers, motors, racks, couplings, and many other parts, like locking assembly, taper bushing, Chain guide, shaft collar, torque limiter, cam clutch, universal joint, motor base and motor slide, rod end, clevis, rubber mount, etc. We make special parts according to drawings and/or samples.

How to choose a gearbox which meets our requirement?
You can refer to our catalogue to choose the gearbox or we can help to choose when you provide
the technical information of required output torque, output speed and motor parameter etc.

What information shall we give before placing a purchase order?
a) Type of the gearbox, ratio, input and output type, input flange, mounting position, and motor informationetc.
b) Housing color.
c) Purchase quantity.
d) Other special requirements.

What industries are your gearboxes being used?
Our gearboxes are widely used in the areas of textile, food processing, beverage, chemical industry,
escalator,automatic storage equipment, metallurgy, tabacco, environmental protection, logistics and etc.

What is the producing process?

Production process including raw material cutting, machine processing, grinding, accessories cleaning, assemble, cleaning, stoving, oil coating, cover pressing, testing, package.

How to control the products quality?

Combining advanced equipment and strict management, we provide high standard and quality bearings for our customers all over the world.

What is the transportation?

-If small quantity , we Suggest to send by express, such as DHL,UPS, TNT FEDEX. If large amount, by air or sea shipping.

Can we design packaging?

-Yes. Default is regular packing, and we can make customer's own packing.

Can you provide OEM service?

-Yes, we work on OEM orders. Which means size, quantity, design, packing solution, etc will depend on your requests; and your logo will be customized on our products.

Can you give me discount on Power Transmissions Parts and Industrial parts?

-Yes, of course. Pls. send me your Email, you'll get more

Q: Are You a trading company or a manufacturer?

A: We Are the factory and have our Own trading company

Q: How Can I get an offer?

A: please send US quotation information: drawings, materials, weight, quantity and requirements, we can accept PDF, ISGS, DWG, STEP file format. If you don't have the drawings, please send us the samples, we can also quote you according to your samples.

Q: What is your minimum order size?

A: it is usually 100 pieces, but a low quantity is acceptable under some special circumstances.

Q: Do you provide samples? Is it free or extra?

A: Yes, we can provide samples free of charge, but we don't pay the freight.

Q: What is the lead time for mass production?

A: honestly, it depends on the number of orders. Normally, if you don't need the tools, deposit them after 30 days or so.

Q: What if the parts don't Work?

A: we can guarantee the quality, but if it happens, please contact us immediately, take some photos, we will check the problem and solve it as soon as possible.

Q: What are your terms of payment?

A: payment is less than US $1000,100% in advance. Payment: $1000,50% wire transfer in advance, balance before shipment,Other Terms of payment are negotiable