Three Construction Tiers, Three Capacity Tiers
Construction drives capacity more than tread material at this small size. The Shepherd PBH20 ball caster maxes at 80 lb because the polyolefin ball is the load-bearing element. Step up to a conventional yoke and you pick up 50%; step up again to the polyolefin side-lock brake and you nearly quadruple it.
| Construction |
Rated Capacity |
Standard Mount |
OEM Application |
| Shepherd PBH20 Polyolefin Ball |
80 lb |
Plate, 3/8″ stem, or kit |
AV racks, institutional furniture, hospitality |
| Hard Rubber Swivel or Rigid |
125 lb |
1-7/8″ x 2-9/16″ plate |
Light shop carts, retail back-room, prep tables |
| Steel Swivel or Rigid |
125 lb |
1-7/8″ x 2-9/16″ plate |
Industrial floors where rubber abrasion is an issue |
| Hard Rubber w/ Top-Lock Brake |
125 lb |
1-7/8″ x 2-9/16″ plate |
Parked workstations, prep stations |
| Polyolefin Side-Lock Brake |
300 lb |
1-7/8″ x 2-9/16″ plate |
Heaviest single-caster load in this footprint |
Sizing the right 2″ x 1″ caster for your equipment
Confirm it really is 2″ x 1″ with a caliper
The 2″ x 1″ and 2″ x 7/8″ sizes are easy to confuse by eye and impossible to mix in the same caster yoke. A 7/8″ wheel rattles in a 1″ yoke; a 1″ wheel binds in a 7/8″ yoke. Always measure tread width (face to face of the hub) before ordering. If you measure 0.875″, shop our 2″ x 7/8″ collection instead.
Match the existing mount — almost everything here uses one plate
The conventional 2″ x 1″ swivel, rigid, and brake casters all share a 1-7/8″ x 2-9/16″ plate with 4 bolt holes. The Shepherd PBH20 ball caster ships in plate, threaded stem (3/8″ x 1″ or 3/8″ x 1-1/2″), and kit configurations. Photograph the existing mount and email info@casterhq.com if the plate or stem dimensions don’t match any of these standards.
Ball caster vs. swivel caster — different rolling behavior
A ball caster (Shepherd PBH20) uses a polyolefin ball that rolls in any direction without a kingpin or swivel raceway. Quieter, lower-profile, no kingpin to loosen — but capacity is capped at 80 lb. A conventional swivel caster uses a kingpin and ball-bearing raceway with a wheel. Higher capacity (125-300 lb) but only pivots around the kingpin, not omnidirectionally.
Pick the polyolefin side-lock when the cart parks under load
The side-lock brake variant at 300 lb is built differently from the 125 lb hard rubber line. Polyolefin spreads load better on a narrow tread; the brake yoke uses heavier-gauge steel; the bearing is a precision ball assembly instead of a plain bushing. The combination is what pushes capacity past every other 2″ x 1″ option we stock.
Fitment note: The Shepherd PBH20’s 80 lb rating is static — meaning a cart sitting still on four of these holds 320 lb fine. Roll the same cart over a tile threshold or expansion joint and you can momentarily hit 1.5-2x that load on a single wheel as it absorbs the bump. The PBH20 is designed for smooth-floor institutional use, not warehouse floors. If the cart crosses any transitions or sees daily use, step up to the 125 lb hard rubber or 300 lb side-lock variant. Email info@casterhq.com with cart weight and floor type before ordering when in doubt.
Common 2″ x 1″ replacement questions
What is a Shepherd PBH20 caster?
Shepherd Casters’ light-duty institutional ball caster. PBH20 prefix denotes a 2″ wheel diameter with a polyolefin ball that rolls in any direction. 80 lb per caster. Available in plate mount, 3/8″ threaded stem (1″ or 1-1/2″ stem length), and complete kits with mounting hardware. Specified as OEM on millions of AV racks, prep stations, institutional furniture, and hospitality equipment worldwide because of consistent dimensional tolerance across mass production runs.
How much weight will four 2″ x 1″ casters hold together?
Depends on construction: 320 lb total for four Shepherd PBH20 ball casters, 500 lb total for four hard rubber or steel 125 lb casters, 1,200 lb total for four polyolefin side-lock 300 lb casters. Always apply a 25-30% safety margin under the rated capacity for real-world shock loads. So a cart rated to carry 800 lb needs casters totaling at least 1,000-1,040 lb (250-260 lb each).
What plate size do 2″ x 1″ casters use?
Industrial standard is 1-7/8″ x 2-9/16″ with 4 bolt holes — used across all conventional 2″ x 1″ swivel, rigid, and brake casters in our inventory. Some older equipment uses 1-1/2″ x 2-21/32″ (slightly different bolt pattern). The Shepherd PBH20 ball caster uses its own smaller plate designed for furniture-grade screws. Always measure your existing mount with a caliper before ordering.
Can I swap a 2″ x 7/8″ caster for a 2″ x 1″ caster?
Not cleanly. The 1/8″ tread-width difference is too tight to mix — a 7/8″ wheel rattles in a 1″ yoke and a 1″ wheel binds in a 7/8″ yoke. If you need to change tread width you generally replace the entire caster, not just the wheel. The plate dimensions are often identical between the two sizes, so the bolt holes will line up — just confirm before ordering.
Polyolefin vs hard rubber on the wheel — which lasts longer?
Polyolefin (plastic) wins on chemical resistance and won’t corrode in wet or sanitizer environments. Hard rubber wins on quieter rolling and slightly better shock absorption on rough floors. In typical indoor industrial use, both run 5-10 years before tread wear matters. Specify polyolefin for food service, healthcare, and wet environments; hard rubber for warehouse and shop carts.
Does CasterHQ carry stem-mount casters in this size class?
Yes for the Shepherd PBH20 ball series — available in 3/8″ x 1″ and 3/8″ x 1-1/2″ threaded stem plus a kit with all hardware. Conventional 125-300 lb 2″ x 1″ casters are currently plate-mount only. If you need a stem-mount conventional caster in this size range, email info@casterhq.com and we’ll cross-reference what’s available across our supplier network.
Why is the 300 lb polyolefin side-lock so much heavier-rated than the rest?
Three engineering differences. First, polyolefin spreads load across the tread more evenly than rubber at this narrow 1″ width, so the contact patch isn’t the bottleneck. Second, the side-lock brake yoke is heavier-gauge steel than the standard 125 lb swivel — more material to carry the load. Third, the bearing assembly is a precision ball bearing rather than a plain bushing, so the rolling friction at rated load is dramatically lower. The combination triples capacity from 125 lb to 300 lb.
How fast do these ship and is there an engineer to call?
Stock 2″ x 1″ casters and Shepherd PBH20 ball casters ship same day from Mansfield, TX when ordered before 3 pm Central time. UPS Ground reaches most US destinations in 2-3 business days. For fitment questions, OEM cross-reference, or quantity quotes, call 844-439-4335 or email info@casterhq.com — a real engineer answers, not a chatbot.
Shepherd PBH20 AuthorizedEvery Shepherd PBH20 configuration in stock — plate, threaded stem (two lengths), and complete mounting kit. OEM cross-reference supported when you have the PBH20 model number.
Five Distinct ConstructionsFrom 80 lb polyolefin ball through 300 lb side-lock brake. Every common B2B 2″ x 1″ spec in one inventory.
Mansfield, TX WarehouseStock orders ship same day before 3 pm Central. UPS Ground reaches most US destinations within 2-3 business days.
Photograph & VerifyEmail a photo of your existing caster mount to info@casterhq.com. We confirm plate, stem, and bolt pattern match before shipping — no “wrong caster” returns.
