628, 628-2Z, 628-2RS Ball Bearing, ISO 15

For an 8 mm shaft and a 24 mm housing bore, the 628 ball bearing (ISO 15) is 8 mm wide. Modeled as simplified STEP files.

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

• Also searched as: 628 bearing, 628-2Z bearing, 628-2RS bearing
• Model id: iso15-628
• Standard: ISO 15 · size 628

Versions

Designation	What differs	Part key	Simplified
628	open	iso15-628	STEP
628-2Z	2Z (shielded)	iso15-628-2z	STEP
628-2RS	2RS (sealed)	iso15-628-2rs	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
d	Bore diameter		8		8	nominal	L1
D	Outside diameter		24		24	nominal	L1
B	Width		8		8	nominal	L1
r	Chamfer dimension	0.3			0.3	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-ISO15-SZ-628.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: 3700 N
• Basic Load Ratings, C0r: 1430 N
• Limiting Speeds, Grease: 28000 min-1
• Limiting Speeds, Oil (Oil-bath): 34000 min-1

The 628 ball bearing beside the 608 and the 689

The 628 is number 20 of the 71 ISO 15 ball bearings published here, listed from 693 to 6306.

• Bore diameter (d): 8 mm on the 628 ball bearing, against 8 mm on the 608 and 9 mm on the 689.
• Outside diameter (D): 24 mm on the 628 ball bearing, against 22 mm on the 608 and 17 mm on the 689.
• Width (B): 8 mm on the 628 ball bearing, against 7 mm on the 608 and 4 mm on the 689.
• Chamfer dimension (r): at least 0.3 mm on the 628 ball bearing, against at least 0.3 mm on the 608 and at least 0.2 mm on the 689.

Other sizes

• One size smaller: 608 Ball Bearing, ISO 15, 8 mm bore, 22 mm OD, 7 mm wide.
• One size larger: 689 Ball Bearing, ISO 15, 9 mm bore, 17 mm OD, 4 mm wide.

Documents

• CC-ISO15-DS-628.pdf: 628 datasheet: values with levels, sources
• CC-ISO15-SZ-628.pdf: 628 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.

Found an error? Use the feedback section on this page.