Oil seal housing and shaft (DIN 3760): bore H8, shaft h11, lead-in chamfers, groove, roughness and hardness — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/oil-seal-housing-and-shaft-din-3760/ (sheet CC BY 4.0) Basis: DICHTA's rotary shaft seal brochure and catalogue (H8 / h11 tables, chamfers, roughness, hardness, contact band), Seals-Shop's installation guide (groove and shaft-end chamfer tables), Tameson's manual and the ISO 6194-1:1982 sample, compared; numbers only Catalog version: 2026-10-20 Sizes: see table below - Housing: bore tolerance H8 for metric seals (DIN 3760) in all three maker documents; the table lists the H8 band by bore range (to 250 mm). The ranges from 250 mm up are left out: DICHTA's figure for 250 to 315 mm (+0.084) and the general ISO 286 page read for comparison disagreed there. Shaft: h11 by shaft range (to 250 mm), same table source. Both tables are DICHTA's, quoting DIN 3760; the bands up to 30 mm agree with a general ISO 286 table read for comparison (cadforum.cz). - Where the makers differ the rows show both: housing bore roughness, housing lead-in angle (10° to 20° against 5° to 10°), shaft hardness (45 or 55 HRC base) and shaft Rz. Follow the seal maker's datasheet for the seal you buy. - Shaft-end chamfer table (Seals-Shop): headings 'Chamfer length for shaft end', d1, d3, R, with d3 given as d1 minus a value and R as 2 to 12; the page does not define d3 or R (its figure is not in the text), so they are shown as printed. DICHTA's rule is a 15° to 30° chamfer with a rounded and polished edge. - Housing groove: Seals-Shop's table (b, b1 = 0.85 × b, b2 = b + 0.3, r2 max) for ring widths 7, 8, 10, 12, 15 and 20 mm; DICHTA prints the same b, t1 min = 0.85 × b, t2 min = b + 0.3 and r2 max 0.5 / 0.7 without saying which type it covers. Neither source says which of b1 / b2 or t1 / t2 is the depth; do not read them as one. - Not tabulated: the width tolerance and the outside-diameter tolerance of the seal (the ISO 6194-1:1982 sample text was too scrambled to read); inch-series (TCM, CR) housings; pressure and speed limits (they depend on the seal). - No file: every figure here is a tolerance, finish or rule; a housing drawn from them would need a choice of seat depth the sources do not fix. Seal sizes: radial-shaft-seals-din-3760-iso-6194 (with case envelopes). item range / size value second value or R source note housing bore H8 (DIN 3760) bore 10 to 18 mm +0.027 / 0 mm DICHTA brochure table — housing bore H8 (DIN 3760) bore 18 to 30 mm +0.033 / 0 mm DICHTA brochure table — housing bore H8 (DIN 3760) bore 30 to 50 mm +0.039 / 0 mm DICHTA brochure table — housing bore H8 (DIN 3760) bore 50 to 80 mm +0.046 / 0 mm DICHTA brochure table — housing bore H8 (DIN 3760) bore 80 to 120 mm +0.054 / 0 mm DICHTA brochure table — housing bore H8 (DIN 3760) bore 120 to 180 mm +0.063 / 0 mm DICHTA brochure table — housing bore H8 (DIN 3760) bore 180 to 250 mm +0.072 / 0 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 6 to 10 mm 0 / -0.090 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 10 to 18 mm 0 / -0.110 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 18 to 30 mm 0 / -0.130 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 30 to 50 mm 0 / -0.160 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 50 to 80 mm 0 / -0.190 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 80 to 120 mm 0 / -0.220 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 120 to 180 mm 0 / -0.250 mm DICHTA brochure table — shaft h11 (DIN 3760) shaft 180 to 250 mm 0 / -0.290 mm DICHTA brochure table — shaft-end chamfer table (Seals-Shop) d1 < 10 mm d3 = d1 - 1.5 R = 2 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 10 to 20 mm d3 = d1 - 2.0 R = 2 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 20 to 30 mm d3 = d1 - 2.5 R = 3 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 30 to 40 mm d3 = d1 - 3.0 R = 3 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 40 to 50 mm d3 = d1 - 3.5 R = 4 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 50 to 70 mm d3 = d1 - 4.0 R = 4 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 70 to 95 mm d3 = d1 - 4.5 R = 5 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 95 to 130 mm d3 = d1 - 5.5 R = 6 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 130 to 240 mm d3 = d1 - 7.0 R = 8 headings d1, d3, R as printed; the page does not define the letters shaft-end chamfer table (Seals-Shop) d1 over 240 to 500 mm d3 = d1 - 11.0 R = 12 headings d1, d3, R as printed; the page does not define the letters housing groove (Seals-Shop) ring width b = 7 mm b1 (0.85 × b) = 5.95; b2 (b + 0.3) = 7.3 r2 max = 0.5 DICHTA prints the same pattern as t1 min = 0.85 × b, t2 min = b + 0.3 with r2 max 0.5 / 0.7 housing groove (Seals-Shop) ring width b = 8 mm b1 (0.85 × b) = 6.80; b2 (b + 0.3) = 8.3 r2 max = 0.5 DICHTA prints the same pattern as t1 min = 0.85 × b, t2 min = b + 0.3 with r2 max 0.5 / 0.7 housing groove (Seals-Shop) ring width b = 10 mm b1 (0.85 × b) = 8.50; b2 (b + 0.3) = 10.3 r2 max = 0.5 DICHTA prints the same pattern as t1 min = 0.85 × b, t2 min = b + 0.3 with r2 max 0.5 / 0.7 housing groove (Seals-Shop) ring width b = 12 mm b1 (0.85 × b) = 10.30; b2 (b + 0.3) = 12.3 r2 max = 0.7 DICHTA prints the same pattern as t1 min = 0.85 × b, t2 min = b + 0.3 with r2 max 0.5 / 0.7 housing groove (Seals-Shop) ring width b = 15 mm b1 (0.85 × b) = 12.75; b2 (b + 0.3) = 15.3 r2 max = 0.7 DICHTA prints the same pattern as t1 min = 0.85 × b, t2 min = b + 0.3 with r2 max 0.5 / 0.7 housing groove (Seals-Shop) ring width b = 20 mm b1 (0.85 × b) = 17.00; b2 (b + 0.3) = 20.3 r2 max = 0.7 DICHTA prints the same pattern as t1 min = 0.85 × b, t2 min = b + 0.3 with r2 max 0.5 / 0.7 housing bore tolerance metric seals ISO H8 (press fit) DICHTA, Seals-Shop, Tameson agree Seals-Shop: soft or thin-walled housings may need a special fit found by trial; inch sizes follow American standards, no value given housing bore roughness — Ra 1.6 to 6.3 µm, Rz 10 to 20 µm, Rmax 25 µm (DICHTA); Ra 1.6 to 6.3, Rz 10 to 20, Rmax 16 to 25 (Seals-Shop, citing ISO 6194/1) Rmax max 16 µm (Tameson); Ra max 3.2, Rmax 12.5 (ISO 6194-1:1982 sample) four values for the same quantity: use the seal maker's housing lead-in chamfer — 10° to 20°, depth per ring thickness (DICHTA) 5° to 10°, length not given (Tameson) the two sources disagree; Seals-Shop gives no housing chamfer shaft tolerance — ISO h11 (DICHTA, Tameson, ISO 6194-1:1982 sample, clause 7.2 'shall not exceed h11') — Seals-Shop prints no shaft tolerance shaft lead-in — 15° to 30° chamfer, edge rounded and polished (DICHTA) 1 mm radius, or chamfer per DIN (Tameson); table above (Seals-Shop) no machining swirl on the running surface (Tameson, Seals-Shop) shaft surface roughness — Ra 0.2 to 0.8 µm, Rz 1 to 5 µm, Rmax 6.3 µm (DICHTA); Ra 0.2 to 0.8, Rz 1 to 4, Rmax 6.3 (Seals-Shop) Rt 1 to 4 µm (Tameson) Rz upper limit 4 or 5 µm by source shaft hardness — 45 HRC min (DIN 3760); 55 HRC at 4 m/s; 60 HRC at 10 m/s; 0.3 mm depth if not through-hardened (DICHTA) 55 HRC or 600 HV, 0.3 mm min depth (Seals-Shop); 45 HRC, 55 HRC for contamination or above 4 m/s (Tameson) sources disagree on the base value (45 or 55 HRC) contact band width (DIN 3761 part 4) shaft up to 50 mm front band 1.2 mm, back band 0.5 mm — DICHTA contact band width (DIN 3761 part 4) shaft 50 to 120 mm front band 1.5 mm, back band 0.8 mm — DICHTA contact band width (DIN 3761 part 4) shaft over 120 mm front band 2 mm, back band 1 mm — DICHTA Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - DICHTA (rotary shaft seals brochure, distributed by MM Intercom): Rotary shaft seals: H8 and h11 tolerance tables by diameter range, chamfer angles, shaft roughness and hardness, contact band width (DIN 3761 part 4) — web — Publisher's page; dimensions are facts — https://mmintercom.com/upload/catalog/product/51441/dichta rotary shaft seals.pdf - DICHTA (catalogue, distributed by MM Intercom): Technical and sealing product catalogue: rotary shaft seals to DIN 3760, installation (housing H8, shaft h11, chamfers, roughness, hardness, groove) — web — Publisher's page; dimensions are facts — https://mmintercom.com/upload/publish/130/DICHTA Technical and Sealing Product Catalogue.pdf - Seals-Shop GmbH: Installation guide, radial oil seal: housing dimensions, shaft-end chamfer table, shaft surface and hardness, installation rules — web — Publisher's page; dimensions are facts — https://www.seals-shop.com/content/medias/installation_guides/en/IG_Radial%20oil%20seal_EN.pdf - Tameson: Rotary shaft seals: installation (housing H8, shaft h11, lead-in, roughness, hardness) — web — Publisher's page; dimensions are facts — https://storage.tameson.com/asset/Products/Manuals/EN/rotary-shaft-seals.pdf - ISO / iTeh Standards: ISO 6194-1:1982 Rotary shaft lip type seals, Part 1: nominal dimensions and tolerances (free sample pages) — web — Standard sample pages; dimensions are facts — https://cdn.standards.iteh.ai/samples/12453/30d2071c361441c4a5e8efc405fdf859/ISO-6194-1-1982.pdf No true-size file yet: the published figures do not fix the whole shape; a measured scan is planned. API: https://xemstudio.com/api/geometry?object=oil-seal-housing-and-shaft-din-3760