TIMKEN 204KRR2

Deep groove ball bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available

Bore diameterd: 18 mm
Outside diameterD: 47 mm
WidthB: 20.955 mm
Dynamic load ratingC: 12.8 kN
Static load ratingC0: 6.58 kN
Mass≈m: 0.13 kg

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Use this page as a technical reference. Verify the current manufacturer specification and the complete application requirements before selection.

Technical data

Product specifications

Metric and imperial values are paired where the manufacturer provides both. Expand a section to review its parameters.

Core specifications10 parameters

Core specifications
Parameter	Symbol	Value
Series		200
Variant / construction		Radial Deep-Groove Ball
Bore diameter	d	18 mm
Outside diameter	D	47 mm
Width	B	20.955 mm
Basic dynamic load rating	C	12.8 kN
Basic static load rating	C0	6.58 kN
Mass	≈m	0.13 kg
Sealing		Sealed
Cage		Steel cage

Calculation Factors6 parameters

Calculation Factors
Parameter	Symbol	Value
K Factor		0.00
Y1 Factor		0.00
Y2 Factor		0.00
Y0 Factor		0.50
E Factor		0.00
Cg Factor		0.0260

Manufacturer Identity6 parameters

Manufacturer Identity
Parameter	Symbol	Value
Brand		Timken
Material Number		000000000100021729
World Assembly Part Number		204KRR2C1
Upc		0087796045644
Official Source System		CORE BP - DS DF
Official Last Run		2026-08-23T20:02:47.76

Product Identity4 parameters

Product Identity
Parameter	Symbol	Value
Type Description		Radial Deep-Groove Ball
Construction		Single Row Deep Groove Ball Bearing \| Imperial Series \| 0.6950 in Bore \| 1.8504 in OD \| 0.8250 in Width \| Double Sealed \| Hex Bore \| Steel Cage \| C0 Clearance \| ISO P0 Tolerance
Number Of Rows		1
Tapered Bore		N

Technical Data10 parameters

Technical Data
Parameter	Symbol	Value
Overall Width		0.000 mm
Radial Rating		14,200 N
Axial Rating		0 N
Dynamic Rating C1		12,800 N
Dynamic Rating C90		0 N
Dynamic Axial Rating Ca90		0 N
Dynamic Axial Rating Ca1		0 N
Static Radial Rating C0		6,580 N
Extended Dynamic Rating Ce		14,200 N
Static Axial Rating C0A		0 N

Exact model answer

204KRR2: hex-bore measurements explained

TIMKEN 204KRR2 is listed in the manufacturer hex-bore ball-bearing catalogue. The shaft opening is not a round bore: its across-flats size is 18 mm, and the source separately lists a minimum across-corners measurement of 20 mm. Do not use the across-corners value as a circular shaft diameter.

The outside diameter D is 47 mm. Overall width B is 21 mm, while outer-ring width C is 14 mm; these width measurements describe different faces.

Record marking: 204KRR2
Bore geometry: Hexagonal, not circular

Read each measurement separately

Bearing dimensions · published units retained
Measurement	Symbol	Metric	Inches
A - Across Flats	A	18 mm	0.70 in
d - Across corners min	d	20 mm	0.80 in
O.D. (D)	D	47 mm	1.85 in
Width (B)	B	21 mm	0.83 in
Outer Ring Width (C)	C	14 mm	0.55 in

What to check on your bearing

Identify whether the actual shaft and inner ring are hexagonal before comparing a nominal bore number.
Measure across opposite flats, then distinguish that measurement from the corner-to-corner dimension. Retain the minimum qualifier shown in the table.
Match the complete 204KRR2 marking and verify closure, mounting and operating requirements; the dimensions do not identify a vehicle or machine fitment.

This is a dated dimensional reference, not a replacement approval or a manufacturer-certified drawing. Similar dimensions do not establish matching geometry, load capability, clearance, material or operating limits.

Factual reference: Timken component-identity feed and official dimensional catalogue; catalogue snapshot 2026-10-01. Interpretation and checking notes by BearingScope.

Replacement verification checklist Search by measured size

Technical documents & data sheet

This product page is a BearingScope catalogue reference, not a manufacturer-certified drawing. Preserve the full brand and designation when comparing files.

Record identity: TIMKEN 204KRR2
Document matching: Exact designation, assembly scope, revision and units must agree.

No verified redistributable CAD or manufacturer PDF is registered for this exact model. A catalogue image is not a dimensioned drawing. Missing technical files are not generated or replaced with unrelated models.

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