Westfield Fasteners Product Specification:

DIN 6799 - E Clips

This product guide contains the specification for E Clips, a type of retaining washer for shafts. E Clips are standard parts available from Westfield Fasteners. The basis of this specification is the DIN standard DIN 6799.

Product Description

E clips are a type of circlip, and are designed for fitment into a mating groove on a shaft or tube. E clips can be used in pairs to help locate other components in place and prevent them from moving along the shaft when the assembly is turning or spinning. As the E clip is pressed into the groove on fitting, it will spread open and grip the shaft between its three points. E-clips are also known as E type circlips, or E rings. E Clips are sized by the diameter of shaft or groove that they are designed to fit.

E Clips are easy to install, available in many sizes, and can be removed with needle-nose pliers and be reused. They're used in a wide range of applications, such as differentials, gear boxes and printing equipment.

Scope of the DIN Standard.

DIN 6799 is the standard specification for manufacturing retaining washers for shafts, more commonly known as E clips, and details the requirements for their use in the axial retention of components on shafts. E Clips are designed to be inserted radially into a mating groove, grip the shaft using their inherent spring tension. Figure 1 and table 1 below define the overall dimensions and tolerances of these E Clips. Table 2 provides some supplementary design information.

The standard states that these clips should conform to the dimensions and tolerances given on the assumption that they are in an uncoated condition. DIN 6799 mentions manufacture in carbon steel and stainless steel.

technical drawing of a Retaining Washer aka E-Clip, to DIN 6799

Figure 1: E Clip

Key to Figure 1

opening width of the unstressed retaining washer (a)
shaft diameter (d₁)
groove diameter: nominal size (d₂)
maximum external diameter when seated in the groove with nominal diameter (d₃)
corner distance (g)
groove width (m)
edge margin (n)
thickness of retaining washer (s)

Clip Size (Groove Diameter)	Shaft Diameter	Retaining Washer					Groove
d₂	d₁	s		a		Mass per 1000 units in kg	d₂		m		n
Nominal Size	d₁	-	perm. dev.	-	perm. dev.	=	-	perm. dev.	-	perm. dev.	min
0.8	1 -1.4	0.2	+/-0.02	0.58	+/-0.040	0.003	0.8	0 -0.04	0.24	+0.04/-0	0.4
1.2	1.4 - 2	0.3		1.01		0.009	1.2	+0/-0.06	0.34		0.6
1.5	2 - 2.5	0.4		1.28		0.021	1.5		0.44		0.8
1.9	2.5 - 3	0.5		1.61		0.040	1.9		0.54	+0.05/-0	1.0
2.3	3 - 4	0.6		1.94		0.069	2.3		0.64		1.0
3.2	4 - 5	0.6		2.70		0.088	3.2	+0/-0.075	0.64		1.0
4	5 - 7	0.7		3.34	+/-0.048	0.158	4		0.74		1.2
5	6 - 8	0.7		4.11		0.236	5		0.74		1.2
6	7 - 9	0.7		5.26		0.255	6		0.74		1.2
7	8 - 11	0.9		5.84		0.474	7	+0/-0.09	0.94		1.5
8	9 - 12	1.0	+/-0.03	6.52	+/-0.058	0.660	8		1.05	+0.08/-0	1.8
9	10 - 14	1.1		7.63		1.090	9		1.15		2.0
10	11 - 15	1.2		8.32		1.250	10		1.25		2.0
12	13 - 18	1.3		10.45	+/-0.070	1.630	12	+0/-0.11	1.35		2.5
15	16 - 24	1.5		12.61		3.370	15	+0/-0.11	1.55		3.0
19	20 - 31	1.75		15.92		6.420	19	+0/-0.13	1.80		3.5
24	25 - 38	2.0		21.88	+/-0.084	8.550	24		2.05		4.0
30	32 - 42	2.5		25.80	+/-0.084	13.500	30		2.55		4.5

Clip Size (Groove Diameter)	d₃	g
d₂
Nominal
0.8	2.25	0.3
1.2	3.25	0.4
1.5	4.25	0.6
1.9	4.80	0.7
2.3	6.30	0.9
3.2	7.30	0.9
4	9.30	1.0
5	11.30	1.0
6	12.30	1.1
7	14.30	1.3
8	16.30	1.5
9	18.80	1.61
10	20.40	1.8
12	23.4	1.9
15	29.4	2.2
19	37.6	2.5
24	44.6	3.0
30	52.6	3.5

DIN 6799 - E Clips

Figure 1: E Clip

Key to Figure 1

Table 1: Dimensions & Tolerances according to DIN 6799 (mm)

Table 2: Supplementary Data according to DIN 6799 (mm)