Heavy Duty Kingpinless Swivel Caster Set of 4 with 4 Inch Thermoplastic Rubber Flat Tread Wheels and Ball Bearings - Includes 2 Swivel with Bolt on Swivel Locks and 2 Rigid - Service Caster Brand

Details

Manufacturer

Service Caster

Model

Series#KP30

SKU

SCC-KP30S420-TPRBF-BSL-2-R-2

Condition

new

Quantity

4

UPC

734005542448

Dimensions (L x W x H)

12 x 12 x 7.5 in

Shipping weight

22 lb

Posted

Sep 17, 2026, 7:00 PM CDT

Specifications

Bolt Size

3/8" (hardware not included)

Capacity

1200

Color

2 Swivel w/2 Bolt On Swivel Locks - 2 Rigid

Durometer

75A

Heat Capacity

-20 degrees F to 180 degrees F

Item Weight Unit of Measure

pounds

Load Height

5-5/8"

Locking Type

2 Bolt On Swivel Locks

Lower Temperature

-20

Lower Temperature UofM

F

Maximum Temperature

180

Maximum Temperature UofM

F

Mounting Height

5-5/8"

Mounting Type

Top Plate

Plating/Coating

Bright Zinc Plated Finish

Casters Mounting Method

Plate

Locking Castersor Wheels

Yes

Swivels

Yes

Size

4" Wheel

Top Plate Size

4" x 4-1/2"

Tread Width

2

Tread Width UofM

inches

Type

(2) Swivel casters w/bolt on swivel locks & (2) rigid casters

Wheel Bearing

Ball Bearing

Wheel Diameter

4

Wheel Diameter UofM

inches

Wheel Material

Thermoplastic Rubber Tread on Polyolefin Core

Wheel Size

4" x 2"

Wheel Type

Thermoplastic Rubber Tread on Polyolefin Core

Description

Listing is for a set of four (4) Service Caster Series #KP30 casters, two (2) swivel casters with bolt on swivel locks and two (2) rigid casters, with 4" diameter by 2" wide gray thermoplastic rubber flat tread wheel and maintenance free precision ball wheel bearings capable of supporting a total weight of 1,200 lbs. (300 lbs./caster). When searching for a reliable and durable solution to your caster needs, consider Service Caster’s Series KP30 thermoplastic rubber on polyolefin core flat tread casters. The soft flat tread is made of thermoplastic rubber that is non-marking and non-marring, and on the polyolefin core provides a long lasting, high capacity wheel that is capable of easy rolling under heavy loads. Featuring a Kingpinless hot forged ASTM1045 steel design that increases caster durability and integrity, the series KP30 eliminates problems associated with kingpin failure due to severe shock loading. In addition, the Kingpinless design features 3/8” diameter HRC45 steel ball bearings which absorb thrust and load in severe environments. Lastly, Service Caster’s Series KP30 casters are finely crafted with grease fittings, and 4 position notches to accept 4-position locks. These highly versatile casters are ideal for a wide range of applications, such as dollies, platform trucks, warehouse carts and freight terminals. Even drywall carts, welding carts, and wall panel carts will be ready to roll on the Series KP30, keeping you moving forward. • These Service Caster Series #KP30 Thermoplastic Rubber Flat Tread casters offer various wheel sizes and mounting heights: 4” Wheel: 5-5/8” mounting height; 5” wheel: 6-1/2” mounting height; 6” wheel: 7-1/2” mounting height; 8" wheel: 9-1/2" mounting height. • Weight Capacity: 4": 300 lbs Capacity/Caster, 5": 350 lbs Capacity/Caster, 6": 500 lbs. Capacity/Caster, and 8": 600 lbs Capacity/Caster • Top plate measures at 4" x 4-1/2" with a bolt hole pattern of 2-5/8" x 3-5/8" to 3" x 3" and can either be bolted or welded on. • Brake options include a side lock brake (SLB) which applies a positive locking force against the wheel hub which prevents the wheel from moving freely, or a bolt-on swivel lock (BSL) that when inserted into one of 4 notches found on the swivel raceway converts a swivel caster to rigid for straight-line tracking at any 90 degree angle. Combining both brake types ensures complete immobility over both swivel and wheel on the caster.