Sealmaster Bearing: Complete Guide to Pillow Blocks, Flange Units, Types & Selection
The Sealmaster bearing is one of the most trusted mounted bearing brands in industrial power transmission, known for tough sealing, easy installation, and long service life in demanding wet and dry environments. Whether you are replacing a worn unit or specifying bearings for a new machine, this guide explains what a Sealmaster bearing is, the housing types (pillow block, flange, take-up and more), the locking and sealing options, common applications, and how to select the right one. As an authorized distributor and stockist of Regal Rexnord, PB Transtech supplies genuine Sealmaster mounted bearings and prepared this guide to help engineers and buyers choose correctly the first time.
What Is a Sealmaster Bearing?
A Sealmaster bearing is a mounted bearing — a rolling-element bearing that comes already fitted inside a housing, ready to bolt onto a machine. Instead of pressing a loose bearing into your own housing, you mount a complete unit, which makes installation faster and alignment easier.
Sealmaster is a mounted bearing brand of Regal Rexnord, in production since 1935. The line covers mounted ball bearings and mounted roller bearings in a wide range of housing styles, locking methods, and sealing options, so there is a Sealmaster unit for almost any shaft size and environment. The brand is especially well known for strong sealing that keeps out dirt, dust, and moisture — the main causes of premature bearing failure.
Sealmaster Bearing Housing Types
The housing is how the bearing attaches to your equipment. Sealmaster offers all the main mounted styles:
- Pillow block — the most common type, bolted to a surface parallel to the shaft. Used everywhere from conveyors to fans.
- Flange units — bolted to a surface perpendicular to the shaft (2-bolt, 4-bolt, and piloted flange styles).
- Take-up units — slide in a frame to adjust belt or chain tension, common on conveyors.
- Hanger units — support a shaft from an overhead or suspended position.
- Cartridge units — a round housing that fits into a bore.
- Bearing inserts — the bearing on its own, to fit into an existing housing.
For mounted bearings of all these styles, you can see the range on the mounted bearings page at PB Transtech.
Mounted Ball vs Mounted Roller Bearings
Sealmaster makes both, and the right choice depends on load:
| Bearing type | Best for | Notes |
|---|---|---|
| Mounted ball bearing | Light to medium radial loads, higher speeds | Easy to install, cost-effective, very common |
| Mounted spherical roller bearing (USRB) | Heavy radial and shock loads | Higher load capacity, handles misalignment |
| Mounted tapered roller bearing (RPB) | Radial, thrust & combination loads | Heavy-duty; a drop-in upgrade from competitor Type E |
Sealmaster also offers specialised lines such as Gold and PN Gold / SS Gold stainless bearings, which are rated to IP69K for washdown duty in food, beverage, and other hygienic environments.
Locking Styles
How the bearing grips the shaft matters for reliability. Sealmaster options include:
- Setscrew locking — simple and widely used; balanced setscrew positions reduce vibration.
- Skwezloc concentric collar — a 360° concentric clamp for a secure, balanced grip.
- Lock collar (single / double) — common on roller bearing units.
- Klamploc tapered adapter — for spherical roller units, giving strong clamping with easier installation.
Sealing Options
Sealing is what Sealmaster is best known for. Good seals keep contaminants out and lubricant in, which is the single biggest factor in mounted bearing life. Options include:
- Felt labyrinth seals — a rotating flinger directs contamination away from the bearing.
- Contact lip seals — for wet or washed-down environments.
- Triple-lip seals (Gold / SS Gold) — dust-tight and able to withstand high-pressure, high-temperature washdown, rated to IP69K.
Choosing the right seal for your environment is often more important than the bearing size, because contamination — not load — is what kills most mounted bearings.
Common Applications
Sealmaster mounted bearings are used across almost every industry, including:
- Material and bulk handling (conveyors, take-ups)
- Food and beverage processing (washdown / stainless lines)
- Pulp and paper
- Water and wastewater treatment
- Cement, mining, and aggregate
- HVAC, fans, and cooling towers
- Agriculture and general machinery
Because they are easy to install, fit most equipment, and lower total cost, mounted bearings are the default choice wherever a shaft needs support.
How to Select the Right Sealmaster Bearing
To choose the correct Sealmaster bearing, have these details ready:
- Shaft diameter (bore size)
- Housing style needed (pillow block, flange, take-up, etc.)
- Load type and size (radial, thrust, shock)
- Speed (RPM)
- Environment (clean, dusty, wet, washdown, high temperature)
- Locking preference (setscrew, concentric collar, etc.)
With these, the correct unit, seal, and locking style can be confirmed quickly. Matching the bearing and seal to your environment is the key to long, trouble-free life.
Why Buy Sealmaster Bearings From PB Transtech
PB Transtech is an authorized distributor and stockist of Regal Rexnord, supplying genuine Sealmaster mounted bearings. Because we hold stock, we offer faster availability and quicker dispatch than long lead-time orders. You get:
- Genuine Sealmaster / Regal Rexnord products, not look-alikes
- Ready stock of popular pillow block and flange sizes
- Correct technical selection support before you order
- Reliable availability and fast dispatch
- After-sales and application assistance
PB Transtech is a trusted distributor and stockist of leading motion and power transmission brands. Explore the full product range and other brands at pbtranstech.com.
Get a quote or selection help: PB Transtech — Authorized Distributor & Stockist of Regal Rexnord Office: Siddeshwar Complex, Opp. Pawana Bank, below Samarth Hospital, Chimbali Phata, Pune–Nashik Highway, Pune – 410501, Maharashtra Phone: +91 97669 30653 / +91 98601 31022 Email: pbcustomersolution@gmail.com
It is a mounted bearing — a rolling bearing already fitted in a housing (such as a pillow block or flange unit) ready to bolt onto a machine. Sealmaster is a mounted bearing brand of Regal Rexnord.
Yes. Sealmaster is one of Regal Rexnord’s mounted bearing brands and has been in production since 1935.
A pillow block bolts to a surface parallel to the shaft, while a flange unit bolts to a surface perpendicular to the shaft. Both house the same type of bearing — the choice depends on how your machine is built.
The Sealmaster Gold, PN Gold, and SS Gold stainless ranges are designed for washdown duty and are rated to IP69K, making them suitable for food, beverage, and hygienic environments.
Identify the shaft diameter, housing style, load and speed, and the environment (wet, dusty, washdown). Match the seal and locking style to that environment — or share your details and the right unit can be selected for you.
Yes. As an authorized distributor and stockist of Regal Rexnord, PB Transtech supplies genuine Sealmaster mounted bearings, with ready stock of popular sizes for fast dispatch.
