We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

TRITAN Miniature Ball Bearing: 638, Dbl Shield, 8 mm Bore, 28 mm OD, 9 mm Wd - General Purpose Radial Ball Bearings
TRITANGeneral Purpose Radial Ball Bearings

TRITAN Miniature Ball Bearing: 638, Dbl Shield, 8 mm Bore, 28 mm OD, 9 mm Wd

The TRITAN Miniature Ball Bearing: 638 is a general purpose radial ball bearing designed for oily/greasy environments. This metric bearing features an 8 mm bore, 28 mm OD, and 9 mm width, with double shields and an…

SKU 3G-OTH-102428

Also listed as: 638ZZPRX · 638-ZZ-PRX

Brand
TRITAN
Item
Miniature Ball Bearing: 638, Dbl Shield, 8 mm Bore, 28 mm OD, 9 mm Wd
Category
General Purpose Radial Ball Bearings
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

TRITAN
Manufacturer Part Number
638 ZZ PRX
Type
Dbl Shield, Alloy Steel Ring
Bore
8 mm
OD
28 mm
Wd
9 mm
For Environment
Oily/Greasy
System of Measurement
Metric
Bearing Industry Number
638

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

TRITAN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The TRITAN Miniature Ball Bearing: 638 is a general purpose radial ball bearing designed for oily/greasy environments. This metric bearing features an 8 mm bore, 28 mm OD, and 9 mm width, with double shields and an alloy steel ring (MPN 638 ZZ PRX).

Frequently Asked Questions

What is the TRITAN 638 miniature ball bearing used for?

The TRITAN 638 miniature ball bearing is a general purpose radial bearing suited for oily or greasy environments. It is commonly used in small electric motors, conveyors, and light industrial machinery where compact size and reliable rotation are needed.

What are the specifications of the TRITAN 638 ZZ PRX bearing?

The TRITAN 638 ZZ PRX is a metric miniature ball bearing with an 8 mm bore, 28 mm OD, and 9 mm width. It features double shields and an alloy steel ring, designed for oily or greasy environments. The bearing industry number is 638.

Where to buy the TRITAN 638 bearing in worldwide?

3G Electric supplies the TRITAN 638 miniature ball bearing worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us to source this bearing for your application.

How to select the correct TRITAN 638 bearing for an application?

To select the TRITAN 638 bearing, verify the shaft diameter (8 mm bore), housing bore (28 mm OD), and width (9 mm). Ensure the operating environment is oily or greasy, as this bearing is designed for such conditions. Double shields protect against contamination.

Used in

Common applications for TRITAN
Poultry processing conveyors — TRITAN food-grade radial ball bearings (SS3829 2RS FM222) with double contact seals
Material handling systems — TRITAN spherical insert bearings (SB205-16G) with set screw locking for shaft mounting
High-temperature oven rollers — TRITAN miniature ball bearings (SSRI814 ZZ SRL) rated to 302°F
Self-lubricating pivot joints — TRITAN spherical plain bearings (GE 30TE 2RS) with PTFE sliding surface
Flange-mounted conveyor idlers — TRITAN 4-bolt flange bearings (UCF210-31) in cast iron housings
Chain drive repairs — TRITAN offset links (40-1R OSL) for ANSI #40 roller chains

TRITAN Products

3G Electric supplies TRITAN general purpose radial ball bearings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
TRITAN Miniature Ball Bearing: 636, Dbl Shield, 6 mm Bore, 22 mm OD, 7 mm Wd, Alloy Steel Ring (MPN 636 ZZ PRX)
TRITAN
TRITAN Miniature Ball Bearing: 636, Dbl Shield, 6 mm Bore, 22 mm OD, 7 mm Wd, Alloy Steel Ring (MPN 636 ZZ PRX)
TRITAN Miniature Ball Bearing: 628, Dbl Shield, 8 mm Bore, 24 mm OD, 8 mm Wd, Alloy Steel Ring (MPN 628 ZZ PRX)
TRITAN
TRITAN Miniature Ball Bearing: 628, Dbl Shield, 8 mm Bore, 24 mm OD, 8 mm Wd, Alloy Steel Ring (MPN 628 ZZ PRX)
TRITAN Miniature Ball Bearing: 635, Dbl Shield, 5 mm Bore, 19 mm OD, 6 mm Wd, Alloy Steel Ring (MPN 635 ZZ PRX)
TRITAN
TRITAN Miniature Ball Bearing: 635, Dbl Shield, 5 mm Bore, 19 mm OD, 6 mm Wd, Alloy Steel Ring (MPN 635 ZZ PRX)
TRITAN Miniature Ball Bearing: 638, Dbl Sealed, Contact Seal, 8 mm Bore, 28 mm OD, 9 mm Wd (MPN 638 2RS PRX)
TRITAN
TRITAN Miniature Ball Bearing: 638, Dbl Sealed, Contact Seal, 8 mm Bore, 28 mm OD, 9 mm Wd (MPN 638 2RS PRX)
TRITAN Miniature Ball Bearing: 623, Dbl Shield, 3 mm Bore, 10 mm OD, 4 mm Wd, Alloy Steel Ring (MPN 623 ZZ PRX)
TRITAN
TRITAN Miniature Ball Bearing: 623, Dbl Shield, 3 mm Bore, 10 mm OD, 4 mm Wd, Alloy Steel Ring (MPN 623 ZZ PRX)
TRITAN Miniature Ball Bearing: 605, Dbl Shield, 5 mm Bore, 14 mm OD, 5 mm Wd, Alloy Steel Ring (MPN 605 ZZ PRX)
TRITAN
TRITAN Miniature Ball Bearing: 605, Dbl Shield, 5 mm Bore, 14 mm OD, 5 mm Wd, Alloy Steel Ring (MPN 605 ZZ PRX)

More from TRITAN

View all TRITAN parts
Metric radial ball bearing with 9 mm bore, 26 mm outside diameter, and 8 mm width. Double contact seals (2RS) retain lubrication and exclude contaminants in oily or greasy environments. Bearing Industry Number 629
TRITAN
Metric radial ball bearing with 9 mm bore, 26 mm outside diameter, and 8 mm width. Double contact seals (2RS) retain lubrication and exclude contaminants in oily or greasy environments. Bearing Industry Number 629
Inch-system radial ball bearing with double contact seals for use in oily or greasy environments. Bore 1 1/8 in, OD 2 1/8 in, width 0.5 in. Bearing industry number R18
TRITAN
Inch-system radial ball bearing with double contact seals for use in oily or greasy environments. Bore 1 1/8 in, OD 2 1/8 in, width 0.5 in. Bearing industry number R18
Metric radial ball bearing with 8 mm bore, 24 mm outer diameter, and 8 mm width. Double contact seals protect against oily or greasy environments. Suitable for use in small electric motors, pumps, conveyors, and industrial machinery requiring compact size and reliable rotation under lubricated conditions
TRITAN
Metric radial ball bearing with 8 mm bore, 24 mm outer diameter, and 8 mm width. Double contact seals protect against oily or greasy environments. Suitable for use in small electric motors, pumps, conveyors, and industrial machinery requiring compact size and reliable rotation under lubricated conditions
Inch-system radial ball bearing with 7/8 in bore, 2 in OD, and 0.563 in width. Double-sealed contact seal design for use in oily or greasy environments. Supports radial loads in rotating machinery such as conveyors, pumps, and gearboxes
TRITAN
Inch-system radial ball bearing with 7/8 in bore, 2 in OD, and 0.563 in width. Double-sealed contact seal design for use in oily or greasy environments. Supports radial loads in rotating machinery such as conveyors, pumps, and gearboxes
Inch-system radial ball bearing with 7/16 in bore, 29/32 in OD, and 0.313 in width. Double-sealed contact seal configuration retains lubricant and excludes contaminants for use in oily or greasy environments. Supports radial loads in rotating machinery such as conveyors, pumps, and gearboxes
TRITAN
Inch-system radial ball bearing with 7/16 in bore, 29/32 in OD, and 0.313 in width. Double-sealed contact seal configuration retains lubricant and excludes contaminants for use in oily or greasy environments. Supports radial loads in rotating machinery such as conveyors, pumps, and gearboxes
Metric double-shielded radial ball bearing with 6 mm bore, 17 mm OD, and 6 mm width. Alloy steel ring construction suited for oily or greasy environments. Used in small motors, conveyors, and light industrial machinery requiring compact size and reliable rotation
TRITAN
Metric double-shielded radial ball bearing with 6 mm bore, 17 mm OD, and 6 mm width. Alloy steel ring construction suited for oily or greasy environments. Used in small motors, conveyors, and light industrial machinery requiring compact size and reliable rotation
This inch-system double-shielded radial ball bearing has a 1/2 in bore, 1 1/8 in OD, and 0.375 in width. It is rated for a maximum operating temperature of 350°F and is suited for oily or greasy environments. Typical applications include industrial machinery, conveyors, and pumps where moderate speeds and radial loads occur
TRITAN
This inch-system double-shielded radial ball bearing has a 1/2 in bore, 1 1/8 in OD, and 0.375 in width. It is rated for a maximum operating temperature of 350°F and is suited for oily or greasy environments. Typical applications include industrial machinery, conveyors, and pumps where moderate speeds and radial loads occur
This inch-system radial ball bearing has a 5/16 in bore, 29/32 in OD, and 0.313 in width. It features a double-shielded design for use in oily or greasy environments and can operate at temperatures up to 350°F. Suitable for applications requiring moderate radial load support and contamination resistance
TRITAN
This inch-system radial ball bearing has a 5/16 in bore, 29/32 in OD, and 0.313 in width. It features a double-shielded design for use in oily or greasy environments and can operate at temperatures up to 350°F. Suitable for applications requiring moderate radial load support and contamination resistance