Xem Studiomeasured geometryLibrary › Hardware › Fasteners ·
Taper pins: ISO 2339 / DIN 1 (1:50) and ANSI / ASME No. 7/0 to No. 14 (1/4 in per foot): diameters, taper, lengths + example taper pin models
What are the small and large end diameters of an ISO 2339 taper pin or an ANSI No. 5 taper pin, and what taper? · Standard part · basis: fasten.it's ISO 2339 table and iTeh's ISO 2339:1986 sample pages (taper, length list), Lawson Products' listings for the 1:50 and 1/4 in per foot tapers, McMaster-Carr's taper-pin tables for the inch No. 7/0 to 14 (which McMaster files under ASME B18.8.2) and a metric cross-check; 24 example pins as files
Also called: iso 2339 taper pin dimensions, din 1 taper pin, taper pin 1:50, taper pin size chart no 5, taper pin number 7 large end diameter, taper pin 1/4 inch per foot, no 10 taper pin diameter, taper pin small end diameter formula, ansi taper pin numbers, taper pin number 3 diameter .219, metric taper pin 6x40, taper pin h10 tolerance
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- length
- 17.9 mm
- width
- 17.9 mm
- height
- 50.8 mm
Notes
- ISO 2339 (DIN 1) taper pins, unhardened, 0.6 to 50 mm: the nominal d is the small end diameter (d max = nominal, d min per the table; the h10 class column is in iTeh's sample page) and the taper is 1:50, i.e. 1 mm on diameter for every 50 mm of length (Lawson's M3 x 50 mm listing: 4 mm large end; McMaster's metric table: 4 mm small end, 20 to 60 mm long, 4.4 to 5.2 mm large end). a approx. is the table's value (the sources read do not define it). Type A pins are ground (Ra 0.8 µm), type B turned (Ra 3.2 µm), designation example 'Taper pin ISO 2339 - A - 6 x 30 - St' (iTeh OCR). Nominal lengths are the same list as the parallel pins: 2 to 100 in steps (2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 35, 40, 45, 50, 55 ... 100), then 120 to 200 (iTeh). The large end of any ISO pin is d + l / 50, computed on the models; it is not a table column.
- Inch rows: pin No. 7/0 to No. 14 with the large end diameter and length range McMaster prints, and the small end range it prints for those lengths; the pin number is the standard's size designation (the large end for No. 5, for example, is 0.289 in, for No. 9 it is 0.591 in, Lawson's ANSI B18.8.2 listing agrees on No. 9: taper 1/4 in per foot, large end 0.591 in). McMaster describes inch pins as 1:48 (about 1/4 in per foot). Small end = large end − length / 48 reproduces McMaster's small-end ranges at both ends of the length range for No. 7/0 (0.063 − 0.75 / 48 = 0.0474; printed 0.047) and No. 5 (0.289 − 1.5 / 48 = 0.2578; printed 0.258). The B18.8.2 standard itself was not read; the dimensions are McMaster's tables, labelled as such.
- McMaster also lists tapped and threaded taper pins (internal thread for pulling, or an external thread for a nut), the threaded types at metric sizes 5 to 30 mm small end and inch No. 1 to 14; those are not tabulated here.
- Hole: a taper pin goes in a hole reamed to the same taper (1:50 or 1/4 in per foot); the taper reamer's own geometry is not in the sources read. Pin ends: the metric table prints a approx., but the sources read do not say what it measures; no end form is modelled.
- Files: true-size cones, small end at z = 0. Metric: small end Ø3, 4, 5, 6, 8, 10, 12 mm at the example lengths 30, 30, 40, 40, 50, 60, 60 mm (all inside McMaster's listed ranges). Inch: No. 7/0 to 2/0 at 0.75 in and No. 0 to 10 at 2 in (all inside McMaster's listed length ranges). Lengths are Xem's choices. No chamfer or crown on the ends. McMaster-Carr sells taper pins with per-part STEP; its category is linked, not copied.
Taper pins: ISO 2339 / DIN 1 (1:50) and ANSI / ASME No. 7/0 to No.… size chart
| system | size | ISO: d min (mm) | inch: large end | ISO: a approx. (mm) | inch: length range | inch: small end range (McMaster) |
|---|---|---|---|---|
| ISO 2339 metric (1:50) | 0.6 (small end, nominal = max) | 0.56 | 0.08 | — |
| ISO 2339 metric (1:50) | 0.8 (small end, nominal = max) | 0.76 | 0.1 | — |
| ISO 2339 metric (1:50) | 1 (small end, nominal = max) | 0.96 | 0.12 | — |
| ISO 2339 metric (1:50) | 1.2 (small end, nominal = max) | 1.16 | 0.16 | — |
| ISO 2339 metric (1:50) | 1.5 (small end, nominal = max) | 1.46 | 0.2 | — |
| ISO 2339 metric (1:50) | 2 (small end, nominal = max) | 1.96 | 0.25 | — |
| ISO 2339 metric (1:50) | 2.5 (small end, nominal = max) | 2.46 | 0.3 | — |
| ISO 2339 metric (1:50) | 3 (small end, nominal = max) | 2.96 | 0.4 | — |
| ISO 2339 metric (1:50) | 4 (small end, nominal = max) | 3.952 | 0.5 | — |
| ISO 2339 metric (1:50) | 5 (small end, nominal = max) | 4.952 | 0.63 | — |
| ISO 2339 metric (1:50) | 6 (small end, nominal = max) | 5.952 | 0.8 | — |
| ISO 2339 metric (1:50) | 8 (small end, nominal = max) | 7.942 | 1 | — |
| ISO 2339 metric (1:50) | 10 (small end, nominal = max) | 9.942 | 1.2 | — |
| ISO 2339 metric (1:50) | 12 (small end, nominal = max) | 11.93 | 1.6 | — |
| ISO 2339 metric (1:50) | 16 (small end, nominal = max) | 15.93 | 2 | — |
| ISO 2339 metric (1:50) | 20 (small end, nominal = max) | 19.916 | 2.5 | — |
| ISO 2339 metric (1:50) | 25 (small end, nominal = max) | 24.916 | 3 | — |
| ISO 2339 metric (1:50) | 30 (small end, nominal = max) | 29.916 | 4 | — |
| ISO 2339 metric (1:50) | 40 (small end, nominal = max) | 39.9 | 5 | — |
| ISO 2339 metric (1:50) | 50 (small end, nominal = max) | 49.9 | 6.3 | — |
| ANSI / ASME inch (1/4 in per ft) | No. 7/0 | 0.063 in (1.60 mm, computed) large end | length 1/2" to 3/4" | small end 0.047" to 0.052" |
| ANSI / ASME inch (1/4 in per ft) | No. 6/0 | 0.078 in (1.98 mm, computed) large end | length 1/2" to 1" | small end 0.057" to 0.068" |
| ANSI / ASME inch (1/4 in per ft) | No. 5/0 | 0.094 in (2.39 mm, computed) large end | length 1/2" to 1 1/2" | small end 0.063" to 0.084" |
| ANSI / ASME inch (1/4 in per ft) | No. 4/0 | 0.109 in (2.77 mm, computed) large end | length 1/2" to 1 1/2" | small end 0.078" to 0.099" |
| ANSI / ASME inch (1/4 in per ft) | No. 3/0 | 0.125 in (3.17 mm, computed) large end | length 1/2" to 1 1/2" | small end 0.094" to 0.115" |
| ANSI / ASME inch (1/4 in per ft) | No. 2/0 | 0.141 in (3.58 mm, computed) large end | length 3/4" to 2 1/2" | small end 0.089" to 0.125" |
| ANSI / ASME inch (1/4 in per ft) | No. 0 | 0.156 in (3.96 mm, computed) large end | length 3/4" to 3" | small end 0.094" to 0.14" |
| ANSI / ASME inch (1/4 in per ft) | No. 1 | 0.172 in (4.37 mm, computed) large end | length 3/4" to 4" | small end 0.089" to 0.156" |
| ANSI / ASME inch (1/4 in per ft) | No. 2 | 0.193 in (4.90 mm, computed) large end | length 3/4" to 4" | small end 0.11" to 0.177" |
| ANSI / ASME inch (1/4 in per ft) | No. 3 | 0.219 in (5.56 mm, computed) large end | length 3/4" to 4" | small end 0.136" to 0.203" |
| ANSI / ASME inch (1/4 in per ft) | No. 4 | 0.250 in (6.35 mm, computed) large end | length 3/4" to 4 1/2" | small end 0.156" to 0.234" |
| ANSI / ASME inch (1/4 in per ft) | No. 5 | 0.289 in (7.34 mm, computed) large end | length 1 1/2" to 7" | small end 0.143" to 0.258" |
| ANSI / ASME inch (1/4 in per ft) | No. 6 | 0.341 in (8.66 mm, computed) large end | length 1 1/2" to 6" | small end 0.216" to 0.31" |
| ANSI / ASME inch (1/4 in per ft) | No. 7 | 0.409 in (10.39 mm, computed) large end | length 1 3/4" to 6" | small end 0.284" to 0.373" |
| ANSI / ASME inch (1/4 in per ft) | No. 8 | 0.492 in (12.50 mm, computed) large end | length 1 1/2" to 7" | small end 0.346" to 0.461" |
| ANSI / ASME inch (1/4 in per ft) | No. 9 | 0.591 in (15.01 mm, computed) large end | length 2" to 7" | small end 0.445" to 0.549" |
| ANSI / ASME inch (1/4 in per ft) | No. 10 | 0.706 in (17.93 mm, computed) large end | length 2" to 8" | small end 0.539" to 0.664" |
| ANSI / ASME inch (1/4 in per ft) | No. 11 | 0.860 in (21.84 mm, computed) large end | length 5" to 12" | small end 0.61" to 0.756" |
| ANSI / ASME inch (1/4 in per ft) | No. 12 | 1.032 in (26.21 mm, computed) large end | length 5" to 12" | small end 0.782" to 0.928" |
| ANSI / ASME inch (1/4 in per ft) | No. 13 | 1.241 in (31.52 mm, computed) large end | length 12" | small end 0.991" |
| ANSI / ASME inch (1/4 in per ft) | No. 14 | 1.523 in (38.68 mm, computed) large end | length 12" | small end 1.273" |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| taper 1:50, small end d (ISO 2339) | d 3, 4, 5, 6, 8, 10, 12 mm; large end = d + l / 50 | hole reamed to the same 1:50 taper with the small-end Ø d at its exit (the taper reamer's own geometry is not in the sources read) | press | taper-pin-iso-* |
| taper 1/4 in per foot, large end (ANSI / ASME) | No. 5 Ø0.289 in, No. 6 Ø0.341, No. 7 Ø0.409, No. 8 Ø0.492, No. 9 Ø0.591, No. 10 Ø0.706 in (McMaster's table) | hole reamed 1/4 in per foot (1:48) with the large-end Ø per size | press | taper-pin-ansi-* |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
Free files
★ Free files 24 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| taper-pin-iso-2339-3x30 | ISO 2339 taper pin, small end Ø3 (nominal d), length 30 mm (example, Xem's choice), taper 1:50 so the large end is Ø3.6 (computed: 3 + 30 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-iso-2339-4x30 | ISO 2339 taper pin, small end Ø4 (nominal d), length 30 mm (example, Xem's choice), taper 1:50 so the large end is Ø4.6 (computed: 4 + 30 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-iso-2339-5x40 | ISO 2339 taper pin, small end Ø5 (nominal d), length 40 mm (example, Xem's choice), taper 1:50 so the large end is Ø5.8 (computed: 5 + 40 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-iso-2339-6x40 | ISO 2339 taper pin, small end Ø6 (nominal d), length 40 mm (example, Xem's choice), taper 1:50 so the large end is Ø6.8 (computed: 6 + 40 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-iso-2339-8x50 | ISO 2339 taper pin, small end Ø8 (nominal d), length 50 mm (example, Xem's choice), taper 1:50 so the large end is Ø9 (computed: 8 + 50 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-iso-2339-10x60 | ISO 2339 taper pin, small end Ø10 (nominal d), length 60 mm (example, Xem's choice), taper 1:50 so the large end is Ø11.2 (computed: 10 + 60 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-iso-2339-12x60 | ISO 2339 taper pin, small end Ø12 (nominal d), length 60 mm (example, Xem's choice), taper 1:50 so the large end is Ø13.2 (computed: 12 + 60 / 50); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no7-0-x-0-75in | ANSI / ASME taper pin No. 7/0: large end Ø0.063 in (1.60 mm), length 0.75 in (19.0 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø1.20 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no6-0-x-0-75in | ANSI / ASME taper pin No. 6/0: large end Ø0.078 in (1.98 mm), length 0.75 in (19.0 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø1.58 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no5-0-x-0-75in | ANSI / ASME taper pin No. 5/0: large end Ø0.094 in (2.39 mm), length 0.75 in (19.0 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø1.99 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no4-0-x-0-75in | ANSI / ASME taper pin No. 4/0: large end Ø0.109 in (2.77 mm), length 0.75 in (19.0 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø2.37 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no3-0-x-0-75in | ANSI / ASME taper pin No. 3/0: large end Ø0.125 in (3.17 mm), length 0.75 in (19.0 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø2.78 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no2-0-x-0-75in | ANSI / ASME taper pin No. 2/0: large end Ø0.141 in (3.58 mm), length 0.75 in (19.0 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø3.18 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no0-x-2in | ANSI / ASME taper pin No. 0: large end Ø0.156 in (3.96 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø2.90 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no1-x-2in | ANSI / ASME taper pin No. 1: large end Ø0.172 in (4.37 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø3.31 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no2-x-2in | ANSI / ASME taper pin No. 2: large end Ø0.193 in (4.90 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø3.84 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no3-x-2in | ANSI / ASME taper pin No. 3: large end Ø0.219 in (5.56 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø4.50 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no4-x-2in | ANSI / ASME taper pin No. 4: large end Ø0.250 in (6.35 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø5.29 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no5-x-2in | ANSI / ASME taper pin No. 5: large end Ø0.289 in (7.34 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø6.28 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no6-x-2in | ANSI / ASME taper pin No. 6: large end Ø0.341 in (8.66 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø7.60 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no7-x-2in | ANSI / ASME taper pin No. 7: large end Ø0.409 in (10.39 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø9.33 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no8-x-2in | ANSI / ASME taper pin No. 8: large end Ø0.492 in (12.50 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø11.44 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no9-x-2in | ANSI / ASME taper pin No. 9: large end Ø0.591 in (15.01 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø13.95 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
| taper-pin-ansi-no10-x-2in | ANSI / ASME taper pin No. 10: large end Ø0.706 in (17.93 mm), length 2 in (50.8 mm, example inside McMaster's listed range, Xem's choice), taper 1/4 in per foot (1:48), so the small end is Ø16.87 mm (computed: large end − length / 48); no end chamfer or crown | STEP · STL |
Let your AI pull this. Add
Set it up →https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=taper-pins-iso-2339-ansi-b18-8-2
Fits with
FreeDowel pins ISO 2338 and ISO 8734 (parallel pins, m6 and h8), 0.6–50 mm: diameter limits, chamfer c, commercial lengths20 sizes★ sheetFreeDowel pins, inch (ASME B18.8.2 hardened ground machine dowel pins), 1/16 to 1 in: standard and oversize diameter limits, point diameter, crown15 sizes★ sheetFree
Spring pins: slotted (ISO 8752, ASME B18.8.2) and coiled (ISO 8750): diameter, wall, chamfer, hole size, shear + hole gauges98.3×20.7×3.0 mm★ 2 filesFreeGrooved pins ISO 8739–8747 (groove pins): types, nominal diameter 1.5–25, a, chamfer c, expanded diameter, double shear, hole class13 sizes★ sheetFree
Clevis pins with head, ISO 2341 (DIN 1444) forms A and B, d 3–100: head diameter and height, split-pin hole, le, radius + example pin models18.0×18.0×54.0 mm★ 10 filesFree
Clevis pins ISO 2341 B, Ø3 to Ø87 sizes★ 7 files
Questions
What taper does a metric taper pin have?
1:50: 1 mm on the diameter every 50 mm of length (ISO 2339; Lawson's M3 x 50 listing and McMaster's metric table agree). The nominal d is the small end.
What diameter is a No. 5 taper pin?
0.289 in at the large end, 1/4 in per foot taper (McMaster's inch table; the small end of a 1-1/2 in pin is about 0.258 in).
How do I find the small end of an inch taper pin?
Subtract length / 48 from the large end (1/4 in per foot is 1:48): No. 5 at 2 in is 0.289 − 2 / 48 = 0.247 in (computed).