8 mm External Retaining Ring (Shaft Circlip), DIN 471

For an 8 mm shaft, grooved to 7.6 mm: the external retaining ring (DIN 471), 0.8 mm thick. Download it as simplified STEP files.

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

• Also searched as: 8 mm circlip
• Model id: din471-d8
• Standard: DIN 471:2011 · size 8 mm

Files

Part key	Simplified
din471-d8	STEP

Dimensions

Symbol	Name	min	nom	max	Modeled	Rule	Level
s	Ring thickness		0.8		0.8	nominal	L1
s_lim	Ring thickness, limits	0.75		0.8	0.775	midpoint of min–max	L0 (max: one source)
d3	Free diameter		7.4		7.4	nominal	L1
d3_lim	Free diameter, limits	7.22		7.46	7.34	midpoint of min–max	L1
a	Lug height			3.2	3.2	single limit (max), modeled at the limit	L1
b	Radial width		1.5 ref		1.5	reference value	L1
d5	Plier hole diameter	1.2			1.2	single limit (min), modeled at the limit	L1
d2	Groove diameter		7.6		7.6	nominal	L1
m	Groove width		0.9		0.9	nominal	L1
n	Groove edge margin	0.6			0.6	single limit (min), modeled at the limit	L1

Drawing

As a PDF: CC-DIN471-SZ-8.pdf.

The 8 mm external retaining ring beside the 7 mm and the 9 mm

The 8 mm is number 6, counting from the smallest, of the 18 DIN 471 external retaining rings published here, from 3 mm to 20 mm.

• Ring thickness (s): 0.8 mm on the 8 mm external retaining ring, against 0.8 mm on the 7 mm and 1 mm on the 9 mm.
• Ring thickness, limits (s_lim): 0.75 to 0.8 mm on the 8 mm external retaining ring, against 0.75 to 0.8 mm on the 7 mm and 0.94 to 1 mm on the 9 mm.
• Free diameter (d3): 7.4 mm on the 8 mm external retaining ring, against 6.5 mm on the 7 mm and 8.4 mm on the 9 mm.
• Free diameter, limits (d3_lim): 7.22 to 7.46 mm on the 8 mm external retaining ring, against 6.32 to 6.56 mm on the 7 mm and 8.22 to 8.46 mm on the 9 mm.
• Lug height (a): up to 3.2 mm on the 8 mm external retaining ring, against up to 3.1 mm on the 7 mm and up to 3.3 mm on the 9 mm.
• Radial width (b): 1.5 mm (reference) on the 8 mm external retaining ring, against 1.4 mm (reference) on the 7 mm and 1.7 mm (reference) on the 9 mm.
• Plier hole diameter (d5): at least 1.2 mm on the 8 mm external retaining ring, the same on the 7 mm and the 9 mm.
• Groove diameter (d2): 7.6 mm on the 8 mm external retaining ring, against 6.7 mm on the 7 mm and 8.6 mm on the 9 mm.

Other sizes

• One size smaller: 7 mm External Retaining Ring (Shaft Circlip), DIN 471, 7 mm shaft, 6.7 mm groove, 0.8 mm thick.
• One size larger: 9 mm External Retaining Ring (Shaft Circlip), DIN 471, 9 mm shaft, 8.6 mm groove, 1 mm thick.

Documents

• CC-DIN471-DS-8.pdf: 8 datasheet: values with levels, sources
• CC-DIN471-SZ-8.pdf: 8 drawing: this size's values on the views
• parts.json: the part record of this size (the platform contract)

Sources

fasten-it-din471, fasteners-eu-din471, hc-maschinentechnik-din471, seeger-din471. Full citations: the method page and this size's datasheet.

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