MotionDriveHubMotors, gearboxes, bearings, couplings, and automation drive components
R4A Ball Bearing, Inch Sizes 0.25" x 0.75" x 0.2812", Open
Bearing

R4A Ball Bearing, Inch Sizes 0.25" x 0.75" x 0.2812", Open

Motion-system detail pages should help buyers decide whether one motor, gearbox or transmission part fits the wider system role before RFQ.

Quote on request

Product sourcing profile

CategoryBearing
Inquiry workflowPlatform RFQ workflow
AvailabilityInquiry required
Updated2026-05-03

Product introduction

R4A Part Number R4A System of Measurement Inch Bearing Type Ball For Load Direction Radial Construction Single Row Seal Type Open Bore Dia 0.25" Bore Dia Tolerance-0.0003" to 0" Outer Dia 0.75" Outer Dia Tolerance-0.0003" to 0" Width 0.2812" Width ToleranceMotionDriveHub curates RFQ-led product discovery for buyers looking for bearings options. The page is organized around specification review, application fit, and inquiry-ready comparison.When evaluating this product, buyers should confirm application fit, required performance range, installation environment, lead time, documentation, and whether the supplier can support OEM or project quotations. Current vertical focus: industrial transmission and automation component sourcing, motion control part discovery, and rfq-ready drive system supply platform.bearing

Selection and RFQ points

Review material fit, application context, alternatives and RFQ detail before comparing related product paths.

Material fit Ball Bearing

Confirm material, size, finish, tolerance and processing needs before price comparison.

Application fit application, operating environment and usage frequency

Add the target application and operating context so related products can be compared correctly.

Alternative path Bearings

Use nearby materials, equipment types or category pages when this record is close but not exact.

RFQ detail Quantity, destination, timing

Include quantity, destination, target delivery window, packaging and any technical constraints.

MotionDriveHub quality checks

System contextJudge the product inside the wider motor, reducer, coupling or linear-motion stack.

Use this check before moving from discovery into product comparison or RFQ submission.

Mechanical requirementCheck torque, speed, mounting and operating cycle before supplier outreach.

Use this check before moving from discovery into product comparison or RFQ submission.

Retrofit detailBring existing machine constraints and replacement expectations into the inquiry.

Use this check before moving from discovery into product comparison or RFQ submission.

Key specifications

Vertical Sitemotiondrivehub
CategoryBearings
Source Domainfitrunbearing.com
Brandfitrunbearing.com
Unitset
ABEC RatingABEC-1
Applicationbearing
Ball Dia0.13780"
Ball Material52100 Chrome Steel (Gcr15)
Ball Qty6
Bearing TypeBall
Bore Dia0.25"
Bore Dia Tolerance0.0003" to 0"
Cage Material300 Series Stainless Steel
CategoryBearings
ConstructionSingle Row
Dynamic Radial Load446 lbf
Feature Highlightsstainless steel
For Load DirectionRadial
LubricationPre-filled / Required
Matched Termsbearing
Max Speed (X1000 rpm)36
Outer Dia0.75"
Outer Dia Tolerance0.0003" to 0"
Part NumberR4A
Product TitleR4A Ball Bearing, Inch Sizes 0.25" x 0.75" x 0.2812", Open
REACHCompliant
Radial Clearance0.00008" to 0.0005"
Radial Clearance Trade No.MC3 (other clearance available)
Ring Material52100 Chrome Steel (Gcr15)
RoHSCompliant
Seal TypeOpen
Shaft Mount TypePress Fit
Static Radial Load161 lbf
System of MeasurementInch
Temperature86 °f
Temperature Range86 °F to 230 °F
Weight7.48 g
Width0.2812"
Width Tolerance0.005" to 0"
pa_bore-dia0.25"
pa_dynamic-radial-load446 lbf
pa_max-speed-x1000-rpm36
pa_outer-dia0.75"
pa_seal-typeOpen
pa_static-radial-load161 lbf
pa_system-of-measurementInch
pa_weight7.48 g
pa_width0.2812"

Keyword evidence

Only terms with visible evidence in this listing are shown here.

Product sourcing keywords

These terms come from the title, visible copy and specifications, and link into matching aggregate pages.

Related keyword paths

Grouped by the product keyword that generated the related path.

SOURCING DECISION BRIEF

R4A Ball Bearing, Inch Sizes 0.25" x 0.75" x 0.2812", Open sourcing decision brief

Motion-system detail pages should help buyers decide whether one motor, gearbox or transmission part fits the wider system role before RFQ.

Category
Bearings
Price status
Quote on request
Inquiry model
Structured product RFQ with quantity, destination and technical requirements.
Availability
Confirm by inquiry
Sourcing lens
Drive-system product decision
Primary compare
Vertical Site, Category, Source Domain
Adjacent category
Linear Motion and Automation Parts
Next route
Bearings, Couplings and Transmission Parts for CNC and Machine Tool Motion
Buyer checklist
  • System role: Confirm how this product fits inside the wider motor, reducer, coupling or linear-motion stack.
  • Mechanical fit: Compare torque, speed, mounting and duty cycle before asking for options.
  • Retrofit handoff: Carry machine constraints and replacement expectations into the RFQ.
How should buyers use this MotionDriveHub detail page?

Use the detail page to confirm one component inside the wider drive system before opening a sourcing request.

What should buyers compare first?

Compare torque, speed, mounting and the nearest application or solution route.

MotionDriveHub related sourcing paths

MotionDriveHub procurement phrases

MotionDriveHub project-fit checks

Power Rating Confirm Power Rating before comparing offers or moving the inquiry forward.
Torque Confirm Torque before comparing offers or moving the inquiry forward.
Speed Confirm Speed before comparing offers or moving the inquiry forward.
Mounting Type Confirm Mounting Type before comparing offers or moving the inquiry forward.
Application route Use Application to compare adjacent options instead of relying on one broad title match.
Country route Use Country to compare adjacent options instead of relying on one broad title match.

MotionDriveHub related product samples

Drive-system sourcing method

System roleJudge the product by its role inside the full motion or transmission system.
Mechanical fitCheck torque, speed, mounting and duty-cycle before supplier outreach.
Upgrade RFQFrame the request around retrofit constraints, load path and expected operating conditions.

Procurement notes

If visible specifications are still thin, add model, material, interface, quantity, application fit, destination and target lead time before comparing quotes.

Next sourcing actions