KOYO R139B/1YDCS60

Automotive bearings technical reference with manufacturer-sourced dimensions, characteristics and engineering resources.

Technical data available

Bore diameterd: 38.894 mm
Outside diameterD: 70.644 mm
WidthB: 39 mm
Mass≈m: 0.475 kg
Stockno.: 70183
d: 38.894 mm

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Technical data

Product specifications

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

Core specifications5 parameters

Core specifications
Parameter	Symbol	Value
Variant / construction		Automotive bearings
Bore diameter	d	38.894 mm
Outside diameter	D	70.644 mm
Width	B	39 mm
Mass	≈m	0.475 kg

Manufacturer Identity2 parameters

Manufacturer Identity
Parameter	Symbol	Value
Brand		KOYO
Official Class Key		200-010-000

Classification2 parameters

Classification
Parameter	Symbol	Value
Official Category Path		Automotive bearings - Automotive bearings
Official Classification 1		Automotive bearings

Technical Data5 parameters

Technical Data
Parameter	Symbol	Value
Stockno.		70183
d		38.894 mm
D		70.644 mm
B		39 mm
Mass (Reference)		0.475 kg

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: KOYO R139B/1YDCS60
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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