Heavy Duty Red Polyurethane on Cast Iron Caster — Series 40 (4", 5", 6" & 8" x 2")
This Series 40 Medium Heavy Duty red polyurethane on cast iron caster is available in four wheel sizes — 4" x 2", 5" x 2", 6" x 2", and 8" x 2" — each on a cold-forged steel top plate with a hardened, double-row ball bearing swivel raceway and built-in Zerk lubrication fitting for smooth 360° movement and long service life. Every size is offered in four configurations: Rigid, Swivel, Swivel with Brake (Top Lock), and Swivel with Total Lock. Select your wheel size and configuration from the menu above; the matching specifications are listed below.
Specifications by Size
Wheel Size
Load Capacity
Overall Height
Swivel Radius
Tread Width
4" x 2"
700 lbs
5-5/8"
3-3/16"
2"
5" x 2"
900 lbs
6-1/2"
3-7/8"
2"
6" x 2"
1000 lbs
7-1/2"
4-37/64"
2"
8" x 2"
1100 lbs
9-1/2"
6"
2"
Configurations & Part Numbers
Size
Type
Brake
Part Number
4" x 2"
Rigid
—
40-40R-A1-PC(R)
4" x 2"
Swivel
—
40-40S-A1-PC(R)
4" x 2"
Swivel with Brake
Top Lock Brake (TB)
40-40S-A1-PC-TB(R)
4" x 2"
Swivel with Total Lock
Total Lock Brake (TTL)
40-40S-A1-PC-TTL(R)
5" x 2"
Rigid
—
40-50R-A1-PC(R)
5" x 2"
Swivel
—
40-50S-A1-PC(R)
5" x 2"
Swivel with Brake
Top Lock Brake (TB)
40-50S-A1-PC-TB(R)
5" x 2"
Swivel with Total Lock
Total Lock Brake (TTL)
40-50S-A1-PC-TTL(R)
6" x 2"
Rigid
—
40-60R-A1-PC(R)
6" x 2"
Swivel
—
40-60S-A1-PC(R)
6" x 2"
Swivel with Brake
Top Lock Brake (TB)
40-60S-A1-PC-TB(R)
6" x 2"
Swivel with Total Lock
Total Lock Brake (TTL)
40-60S-A1-PC-TTL(R)
8" x 2"
Rigid
—
40-80R-A1-PC(R)
8" x 2"
Swivel
—
40-80S-A1-PC(R)
8" x 2"
Swivel with Brake
Top Lock Brake (TB)
40-80S-A1-PC-TB(R)
8" x 2"
Swivel with Total Lock
Total Lock Brake (TTL)
40-80S-A1-PC-TTL(R)
Common Specifications (all sizes)
Series
40 — Medium Heavy Duty
Wheel Material
Red Polyurethane on Cast Iron
Tread Width
2"
Axle Diameter
1/2"
Kingpin
5/8"
Bearing
Roller
Top Plate Size
3-15/16" x 4-1/2"
Bolt Hole Spacing
2-5/8" x 3-5/8" ~ 3" x 3"
Mounting Bolt Size
3/8"
Finish
Zinc Plated
Key Features
Red Polyurethane on Cast Iron wheel — high strength, low rolling resistance
Four wheel sizes (4", 5", 6", 8" x 2") rated 700–1100 lbs per caster
Cold-forged steel top plate with hardened, double-row ball bearing swivel raceway
5/8" kingpin and 1/2" axle with built-in Zerk lubrication fitting
Rigid, Swivel, Swivel with Brake (Top Lock) and Swivel with Total Lock configurations
Corrosion-resistant zinc plated finish
Applications & Common Uses
Floor-protecting carts
Ergonomic platform trucks
Racks
Retail stockrooms
Carts
Platform trucks
Ideal for platform trucks, stock carts, dollies, workbenches, shelving, and heavy material handling equipment across warehouse, industrial, and commercial settings.