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Retaining rings DIN 471 (external, for shafts): ring dimensions and groove diameter d2 × width m, 3 to 100 mm

What groove diameter and width does a DIN 471 external retaining ring (circlip) need on a shaft, and what are the ring's thickness and lug sizes? · Standard part · basis: DIN 471 tables as published by Westfield Fasteners, s / d2 / m checked against Maedler's data sheet, column meanings from fasten.it; McMaster-Carr linked for CAD

Also called: din 471, din 471 groove, external circlip groove, retaining ring groove diameter, circlip groove width, snap ring groove dimensions, din 471 table, external retaining ring dimensions, circlip groove 10mm, circlip groove 8mm, din 471 20mm, seeger ring shaft groove, wellensicherungsring

Exact dimensions. True size, with no printing tolerance added.

sizes
56 in table

Notes

  • DIN 471 is the external retaining ring (circlip, snap ring) for shafts: a split spring-steel ring that sits in a groove turned into the shaft. The groove is the part you design: its diameter d2, width m and depth t = (d1 − d2) / 2 are in the table, plus the edge margin n the groove needs to the shaft end. The ring's own numbers (thickness s, free inside diameter d3, lug width a and width b, lug-hole diameter d5) are there so a housing or tool clears them.
  • Table: normal type, 3 to 100 mm, as printed in Westfield Fasteners' DIN 471 table (listed values for sizes 23, 27, 37, 39, 44, 46 and 47 are blank there and are not in the table). Cross-checks: s, d2 and m of nine sizes (3, 8, 10, 12, 20, 25, 40, 50, 75) agree with Maedler's data sheet; t equals (d1 − d2) / 2 on all rows; fasten.it's DIN 471 page lists the same columns (edition 04/2011, replacing 09/1981). Tolerances (d2 h10-type steps, m H13) are in the standard, not in the files. One example table elsewhere (Sunhyings) shows 9.4 instead of 9.6 for the 10 mm groove; it is labelled an example and the two maker tables agree with each other and with the existing circlip groove sizes on the shaft page, so it is not used.
  • Files: half-section groove templates for 11 common sizes: a shaft Ø d1 × 4 d1 long with the groove Ø d2 × m wide, cut in half along the axis (flat face down, so it prints and lays against a ring or caliper), nominal. The shaft length and groove position are an example (the standard fixes the groove, not the shaft); use them to check a ring or a bore on the printer before cutting steel.
  • Left out: the ring outline. The lug shape, the ring's cross-section and the opening gap are drawn in the standard but the tables used here only give a, b, d3, s and d5, so a ring file would be invented; heavy-type rings (DIN 471 table 2), sizes above 100 mm, load capacities and detaching speeds.
  • Inch rings: McMaster-Carr lists MS 16624 external rings (page links below) and inch internal rings; the MS 16624 / MS 16625 dimension tables were not readable here, so no inch numbers are published. McMaster's DIN 471 category carries free per-part STEP; it is linked, not copied.

Retaining rings DIN 471 (external, for shafts): ring dimensions and… size chart

shaft d1, mmring thickness s, mmring free inner Ø d3, mmlug width a (max), mmring width b (approx), mmlug hole d5 (min), mmgroove Ø d2, mmgroove width m, mmgroove depth t, mmedge margin n (min), mm
30.42.71.90.812.80.50.10.3
40.43.72.20.913.80.50.10.3
50.64.72.51.114.80.70.10.3
60.75.62.71.31.25.70.80.150.5
70.86.53.11.41.26.70.90.150.5
80.87.43.21.51.27.60.90.20.6
918.43.31.71.28.61.10.20.6
1019.33.31.81.59.61.10.20.6
11110.23.31.81.510.51.10.250.8
121113.31.81.711.51.10.250.8
13111.93.421.712.41.10.30.9
14112.93.52.11.713.41.10.30.9
15113.83.62.21.714.31.10.351.1
16114.73.72.21.715.21.10.41.2
17115.73.82.31.716.21.10.41.2
181.216.53.92.42171.30.51.5
191.217.53.92.52181.30.51.5
201.218.542.62191.30.51.5
211.219.54.12.72201.30.51.5
221.220.54.22.82211.30.51.5
241.222.24.43222.91.30.551.7
251.223.24.43223.91.30.551.7
261.224.24.53.1224.91.30.551.7
281.525.94.73.2226.61.60.72.1
291.526.94.83.4227.61.60.72.1
301.527.953.5228.61.60.72.1
321.529.65.23.62.530.31.60.852.6
341.531.55.43.82.532.31.60.852.6
351.532.25.63.92.5331.613
361.7533.25.642.5341.8513
381.7535.25.84.22.5361.8513
401.7536.564.42.537.51.851.253.8
421.7538.56.54.52.539.51.851.253.8
451.7541.56.74.72.542.51.851.253.8
481.7544.56.952.545.51.851.253.8
50245.86.95.12.5472.151.54.5
52247.875.22.5492.151.54.5
55250.87.25.42.5522.151.54.5
56251.57.35.52.5532.151.54.5
58253.57.35.62.5552.151.54.5
60255.87.45.82.5572.151.54.5
62257.87.562.5592.151.54.5
63258.87.66.22.5602.151.54.5
652.560.87.86.33622.651.54.5
682.563.586.53652.651.54.5
702.565.58.16.63672.651.54.5
722.567.58.26.83692.651.54.5
752.570.58.473722.651.54.5
782.573.58.67.33752.651.54.5
802.574.58.67.4376.52.651.755.3
822.576.58.77.6378.52.651.755.3
85379.58.77.83.581.53.151.755.3
88382.58.883.584.53.151.755.3
90384.58.88.23.586.53.151.755.3
95389.59.48.63.591.53.151.755.3
100394.59.693.596.53.151.755.3

Where the files are

Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.

Westfield FastenersRetaining rings for shafts, DIN 471: d1, s, d3, a, b, d5 and groove d2, m, t, n (3 to 100 mm)webPublisher's page; dimensions are facts
Maedler (Mercateo data sheet)Retaining rings DIN 471 for shafts: s, d2, m (cross-check)webPublisher's page; dimensions are facts
fasten.itDIN 471 Standard dimensions for retaining rings for shafts: column meaningswebPublisher's page; dimensions are facts
McMaster-CarrDIN 471 retaining rings (external) (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify
McMaster-CarrDIN retaining rings (DIN 471 / 472) (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify
McMaster-CarrRetaining rings (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify
McMaster-CarrMS 16624 retaining rings (inch external; listed per size, e.g. MS 16624-1175) (free STEP/IGES per part, for your own design use; no redistribution)STEP, IGES, PDFMcMaster-Carr site terms: personal design use, no redistribution verify

Free files

★ Free files 11 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json

groove-gauge-shaft-8mm-din-471Half-section (cut along the axis, flat face down) of a Ø8 × 32 mm shaft with the DIN 471 ring groove: groove Ø7.6 (d2) × 0.9 mm wide (m), groove centre 12 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-10mm-din-471Half-section (cut along the axis, flat face down) of a Ø10 × 40 mm shaft with the DIN 471 ring groove: groove Ø9.6 (d2) × 1.1 mm wide (m), groove centre 15 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-12mm-din-471Half-section (cut along the axis, flat face down) of a Ø12 × 48 mm shaft with the DIN 471 ring groove: groove Ø11.5 (d2) × 1.1 mm wide (m), groove centre 18 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-15mm-din-471Half-section (cut along the axis, flat face down) of a Ø15 × 60 mm shaft with the DIN 471 ring groove: groove Ø14.3 (d2) × 1.1 mm wide (m), groove centre 22.5 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-17mm-din-471Half-section (cut along the axis, flat face down) of a Ø17 × 68 mm shaft with the DIN 471 ring groove: groove Ø16.2 (d2) × 1.1 mm wide (m), groove centre 25.5 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-20mm-din-471Half-section (cut along the axis, flat face down) of a Ø20 × 80 mm shaft with the DIN 471 ring groove: groove Ø19 (d2) × 1.3 mm wide (m), groove centre 30 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-25mm-din-471Half-section (cut along the axis, flat face down) of a Ø25 × 100 mm shaft with the DIN 471 ring groove: groove Ø23.9 (d2) × 1.3 mm wide (m), groove centre 37.5 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-30mm-din-471Half-section (cut along the axis, flat face down) of a Ø30 × 120 mm shaft with the DIN 471 ring groove: groove Ø28.6 (d2) × 1.6 mm wide (m), groove centre 45 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-35mm-din-471Half-section (cut along the axis, flat face down) of a Ø35 × 140 mm shaft with the DIN 471 ring groove: groove Ø33 (d2) × 1.6 mm wide (m), groove centre 52.5 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-40mm-din-471Half-section (cut along the axis, flat face down) of a Ø40 × 160 mm shaft with the DIN 471 ring groove: groove Ø37.5 (d2) × 1.85 mm wide (m), groove centre 60 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
groove-gauge-shaft-50mm-din-471Half-section (cut along the axis, flat face down) of a Ø50 × 200 mm shaft with the DIN 471 ring groove: groove Ø47 (d2) × 2.15 mm wide (m), groove centre 75 mm from one end; nominal values, no chamfers; length and groove position are an example, d1, d2 and m are the standard'sSTEP · STL
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Plain text: sheet.txt · JSON: /api/geometry?object=retaining-rings-din-471-external

Retaining rings DIN 471 (external, for shafts): ring dimensions and groove diameter d2 × width m, 3 to 100 mm, isometric render of a generated part
Render of groove-gauge-shaft-20mm-din-471 from the free STEP; not to scale.

Fits with

Retaining rings DIN 472 (internal, for bores): ring dimensions and groove diameter d2 × width m, 8 to 110 mm, isometric render of a generated part
Retaining rings DIN 472 (internal, for bores): ring dimensions and groove diameter d2 × width m, 8 to 110 mm41 sizes★ 11 files
Metric shafts Ø3 to Ø10 with D-flats and clip grooves, isometric render of a generated part
Metric shafts Ø3 to Ø10 with D-flats and clip grooves10 sizes★ 10 files
Ball bearings, 683 to 6210 and flanged F6xx (ISO 15), isometric render of a generated part
Ball bearings, 683 to 6210 and flanged F6xx (ISO 15)44 sizes★ 44 files
Deep-groove ball bearings, series 60, 62, 63, 68 and 69: 6000 to 6310 (ISO 15), isometric render of a generated part
Deep-groove ball bearings, series 60, 62, 63, 68 and 69: 6000 to 6310 (ISO 15)55 sizes★ 55 files
608 ball bearing, isometric render of a generated part
608 ball bearing7×22×22 mm★ 2 files
Clevis pins ISO 2341 B, Ø3 to Ø8, isometric render of a generated part
Clevis pins ISO 2341 B, Ø3 to Ø87 sizes★ 7 files

Questions

What groove does a 10 mm DIN 471 ring need?

Groove diameter 9.6 mm, 1.1 mm wide (depth 0.2 mm); the ring is 1.0 mm thick with a 9.3 mm free inside diameter.

How is the groove depth found?

t = (d1 − d2) / 2: for a 20 mm shaft with a 19.0 mm groove that is 0.5 mm. The groove width m is the ring thickness + 0.1 mm up to 1.75 mm rings and + 0.15 mm from 2.0 mm rings up.

Does McMaster-Carr sell DIN 471 rings?

Yes: it has a DIN 471 retaining ring category and MS 16624 inch external rings; both are linked on this page.