Stainless Steel DIN 471 External Circlip

Wanluo factory high quality Stainless Steel DIN 471 External Circlip are manufactured strictly in accordance with German DIN industrial standards, belonging to precision elastic retaining fasteners specially designed for shaft fixing.

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Product Description

Unlike washers used for pressure bearing and anti-loosening, Stainless Steel DIN 471 External Circlip feature an open elastic ring structure, exclusively applied to the outer circular groove of rotating and fixed shafts. With precise elastic shrinkage and reset performance, it can be quickly installed into the shaft groove to realize axial limit, effectively preventing bearings, gears, sleeves and other shaft parts from axial sliding and falling off during mechanical operation. It is an essential standard fastener for mechanical transmission assembly, featuring easy installation, high clamping accuracy and long-term stable limit effect.

Core Component Design & Standardized Processing Technique

DIN 471 external shaft circlips adopt high-quality spring steel and stainless steel raw materials, processed by integrated precision stamping, integral quenching and tempering heat treatment and edge finishing. The standard open gap and reserved installation holes perfectly match professional circlip pliers for fast assembly and disassembly. The inner diameter and radian are precisely calibrated to ensure tight clamping fit with standard shaft grooves, no loose clamping or excessive tightening deviation. The overall ring body has uniform thickness and excellent elastic toughness, with stable shrinkage and reset performance, not easy to produce elastic fatigue, permanent deformation or fracture after repeated disassembly and long-term vibration operation. The smooth burr-free outer edge avoids scratching matching parts, and the overall structural strength meets industrial heavy-load limit requirements.

Product Parameter

Parameter Item	Detailed Specification
Product Name	DIN 471 External Circlip, Shaft Retaining Ring, External Snap Ring
Executive Standard	DIN 471, ISO Standard, GB Standard, Custom Non-standard Sizes
Available Material	304, 316L Stainless Steel, High-quality Spring Steel, Zinc-plated Carbon Steel
Size Range	Shaft diameter φ3mm-φ100mm full standard sizes, custom special aperture & thickness
Structure Type	External open elastic ring, double installation hole design, shaft groove clamping type
Processing Technology	Precision stamping, heat treatment toughening, edge deburring, elastic calibration
Applicable Object	Standard rotating shafts, gear shafts, bearing shafts and cylindrical shaft parts
Surface Treatment	Pickling & passivation / Zinc-plated / Black oxide, anti-rust & anti-corrosion
Mechanical Properties	Strong elastic toughness, anti-fatigue, anti-drop limit, stable clamping force
Packaging Method	Moisture-proof inner bag + export carton, pallet packing for bulk orders
Supply Service	Spot bulk supply, non-standard customization, mixed fastener one-stop procurement

Stainless Steel Din 471 External Circlip

Nominal Diameter d		3	4	5	6	7	8	9	10	11	12	13	14	15	16	17
s	max	0.4	0.4	0.6	0.7	0.8	0.8	1	1	1	1	1	1	1	1	1
s	min	0.35	0.35	0.55	0.65	0.75	0.75	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.94	0.94
d₃	max	2.74	3.74	4.74	5.64	6.56	7.46	8.46	9.4	10.3	11.1	12	13	13.9	14.8	15.8
d₃	min	2.55	3.55	4.55	5.45	6.32	7.22	8.22	8.94	9.84	10.64	11.54	12.54	13.44	14.34	15.34
d₅	min	1	1	1	1.2	1.2	1.2	1.2	1.5	1.5	1.7	1.7	1.7	1.7	1.7	1.7
a	max	1.9	2.2	2.5	2.7	3.1	3.2	3.3	3.3	3.3	3.3	3.4	3.5	3.6	3.7	3.8
n	≈	0.8	0.9	1.1	1.3	1.4	1.5	1.7	1.8	1.8	1.8	2	2.1	2.2	2.2	2.3
per 1000 units ≈ kg		0.017	0.022	0.066	0.084	0.121	0.158	0.300	0.340	0.410	0.500	0.530	0.640	0.670	0.700	0.820

Nominal Diameter d		18	19	20	21	22	24	25	26	28	29	30	32	34	35	36
s	max	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.5	1.5	1.5	1.5	1.5	1.5	1.75
s	min	1.14	1.14	1.14	1.14	1.14	1.14	1.14	1.14	1.44	1.44	1.44	1.44	1.44	1.44	1.69
d₃	max	16.6	17.6	18.63	19.63	20.63	22.41	23.41	24.41	26.11	27.11	28.11	29.81	31.75	32.45	33.45
d₃	min	16.14	17.14	18.08	19.08	20.08	21.78	22.78	23.78	25.48	26.48	27.48	29.18	31	31.7	32.7
d₅	min	2	2	2	2	2	2	2	2	2	2	2	2	2.5	2.5	2.5
a	max	3.9	3.9	4	4.1	4.2	4.4	4.4	4.5	4.7	4.8	5	5.2	5.4	5.6	5.6
n	≈	2.4	2.5	2.6	2.7	2.8	3	3	3.1	3.2	3.4	3.5	3.6	3.8	3.9	4
per 1000 units ≈ kg		1.11	1.22	1.30	1.42	1.50	1.77	1.90	1.96	2.92	3.2	3.31	3.54	3.8	4.00	5.00

Nominal Diameter d		38	40	42	45	48	50	52	55	56	58	60	62	63	65	68
s	max	1.75	1.75	1.75	1.75	1.75	2	2	2	2	2	2	2	2	2.5	2.5
s	min	1.69	1.69	1.69	1.69	1.69	1.93	1.93	1.93	1.93	1.93	1.93	1.93	1.93	2.43	2.43
d₃	max	35.45	36.89	38.89	41.89	44.89	46.19	48.19	51.26	52.26	54.26	56.26	58.26	59.26	61.26	63.96
d₃	min	34.7	35.6	37.6	40.6	43.6	44.9	46.9	49.7	50.7	52.7	54.7	56.7	57.7	59.7	62.4
d₅	min	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	2.5	3	3
a	max	5.8	6	6.5	6.7	6.9	6.9	7	7.2	7.3	7.3	7.4	7.5	7.6	7.8	8
n	≈	4.2	4.4	4.5	4.7	5	5.1	5.2	5.4	5.5	5.6	5.8	6	6.2	6.3	6.5
per 1000 units ≈ kg		5.62	6.03	6.50	7.50	7.90	10.2	11.1	11.4	11.8	12.6	12.9	14.3	15.9	18.2	21.8

Nominal Diameter d		70	72	75	78	80	82	85	88	90	95	100	105	110	115	120
s	max	2.5	2.5	2.5	2.5	2.5	2.5	3	3	3	3	3	4	4	4	4
s	min	2.43	2.43	2.43	2.43	2.43	2.43	2.92	2.92	2.92	2.92	2.92	3.9	3.9	3.9	3.9
d₃	max	65.96	67.96	70.96	73.96	74.96	76.96	79.96	83.04	85.04	90.04	95.04	98.54	103.54	108.54	113.54
d₃	min	64.4	66.4	69.4	72.4	73.4	75.4	78.4	81.2	83.2	88.2	93.2	96.7	101.7	106.7	111.7
d₅	min	3	3	3	3	3	3	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5	3.5
a	max	8.1	8.2	8.4	8.6	8.6	8.7	8.7	8.8	8.8	9.4	9.6	9.9	10.1	10.6	11
n	≈	6.6	6.8	7	7.3	7.4	7.6	7.8	8	8.2	8.6	9	9.3	9.6	9.8	10.2
per 1000 units ≈ kg		22.0	22.5	24.6	26.2	27.3	31.2	36.4	41.2	44.5	49	53.7	80	82	84	86

Standout Product Benefits & Universal Working Condition Adaptation

1. Professional external shaft clamping design perfectly matches standard shaft grooves, providing uniform and stable elastic clamping force, effectively limiting axial displacement of shaft parts and solving the problem of component falling off caused by equipment vibration and rotation.

2. High-precision integral heat treatment process endows the circlip with excellent elastic recovery and anti-fatigue performance. It maintains stable elasticity after repeated expansion and contraction, no relaxation or failure during long-term high-speed operation.

3. Reserved double installation holes cooperate with special circlip pliers, realizing fast assembly and disassembly, greatly improving equipment maintenance and component replacement efficiency, suitable for batch industrial assembly.

4. Burr-free smooth finishing protects shafts and matching parts from scratch and abrasion during installation and operation, ensuring the assembly precision and service life of transmission components.

5. Multiple material and surface treatment options adapt to different working environments, widely used in mechanical equipment, automotive parts, electrical appliances, hydraulic pneumatic components and automated transmission systems.

Stainless Steel Din 471 External Circlip

FAQ

Q1: What is Stainless Steel DIN 471 External Circlip used for?

A1: DIN 471 is an external circlip for shafts, mainly installed on the outer groove of mechanical shafts to fix bearings, gears, shaft sleeves and other parts, preventing axial sliding and falling off, realizing precise limit of rotating shaft components.

Q2: What is the difference between DIN 471 (shaft) and DIN 472 (hole) circlips?

A2: DIN 471 is external circlip for shaft installation, clamping the outer circle of the shaft; DIN 472 is internal circlip for hole installation, clamping the inner wall of the hole. The two structures are opposite and not interchangeable.

Q3: Will the circlip lose elasticity after long-term use?

A3: Our DIN 471 circlips adopt strict quenching and tempering treatment, with stable elastic performance and strong anti-fatigue ability. Under standard working conditions, it will not be loose or invalid, ensuring long-term limit stability.

Q4: Does installation require professional tools?

A4: Yes. It is recommended to use matching circlip pliers for expansion installation to avoid artificial deformation and fracture, ensuring tight fit and stable limiting effect after installation.

Q5: Can you customize non-standard circlips?

A5: Yes. We support customizing special outer diameter, thickness, groove size and high-corrosion-resistance surface treatment to meet the limit requirements of special mechanical shaft components.

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