634, 634-2Z, 634-2RS Ball Bearing, ISO 15

The 634 ball bearing (ISO 15) has a 4 mm bore, a 16 mm outside diameter and a width of 5 mm. Get it as simplified STEP files.

How these parts are made, and what the levels mean: read the method

• Also searched as: 634 bearing, 634-2Z bearing, 634-2RS bearing
• Model id: iso15-634
• Standard: ISO 15 · size 634

Versions

Designation	What differs	Part key	Simplified
634	open	iso15-634	STEP
634-2Z	2Z (shielded)	iso15-634-2z	STEP
634-2RS	2RS (sealed)	iso15-634-2rs	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		4		4	nominal	L1
D	Outside diameter		16		16	nominal	L1
B	Width		5		5	nominal	L1
r	Chamfer dimension	0.3			0.3	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-ISO15-SZ-634.pdf.

Load ratings and speeds

What NSK's web catalogue (nsk-dgbb) lists for its open bearing of this designation. Limiting speeds are for the open bearing; a shielded or sealed bearing has its own, lower ones.

• Basic Load Ratings, Cr: 1910 N
• Basic Load Ratings, C0r: 670 N
• Limiting Speeds, Grease: 36000 min-1
• Limiting Speeds, Oil (Oil-bath): 43000 min-1

The 634 ball bearing beside the 624 and the 695

The 634 is number 7 of the 71 ISO 15 ball bearings published here, listed from 693 to 6306.

• Bore diameter (d): 4 mm on the 634 ball bearing, against 4 mm on the 624 and 5 mm on the 695.
• Outside diameter (D): 16 mm on the 634 ball bearing, against 13 mm on the 624 and 13 mm on the 695.
• Width (B): 5 mm on the 634 ball bearing, against 5 mm on the 624 and 4 mm on the 695.
• Chamfer dimension (r): at least 0.3 mm on the 634 ball bearing, against at least 0.2 mm on the 624 and at least 0.2 mm on the 695.

Other sizes

• One size smaller: 624 Ball Bearing, ISO 15, 4 mm bore, 13 mm OD, 5 mm wide.
• One size larger: 695 Ball Bearing, ISO 15, 5 mm bore, 13 mm OD, 4 mm wide.

Documents

• CC-ISO15-DS-634.pdf: 634 datasheet: values with levels, sources
• CC-ISO15-SZ-634.pdf: 634 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

nsk-dgbb, ntn-bearingfinder-dgbb, skf-17000-dgbb. Full citations: the method page and this size's datasheet.

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