Drill bushings ASME B94.33 press-fit, plain (P) and headed (H): ID range, OD, length, head diameter and thickness, 5/32 to 2-1/4 in OD + STEP/STL — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/drill-bushings-ansi-b94-33-p-h/ (sheet CC BY 4.0) Basis: Carr Lane's H bushing table and tolerance tables, amesweb's Type P and Type H pages (cite ASME B94.33-1996); McMaster-Carr linked for CAD Catalog version: 2026-10-20 Sizes: see table below - ASME B94.33 (previously ANSI B94.33) is the inch jig bushing standard: type P is the plain press-fit (headless) bushing, type H the same with a head. The series number is the OD in 1/32 in (H-16 is 1/4 in OD, H-32 is 1/2 in), and the part number ends with the length in 1/16 in (H-16-8 is a 1/2 in long body). Metric bushings follow the DIN 172 / 179 pages. - OD: ground, nominal plus the Carr Lane tolerance (+.0016/+.0012 in for 5/32 to 13/64; +.0016/+.0013 for 1/4 to 13/32; +.0017/+.0014 for 7/16 to 5/8; +.0018/+.0015 for 3/4 to 1; +.0020/+.0017 for 1-1/8 to 1-1/4; +.0022/+.0018 for 1-3/8 to 1-1/2; +.0023/+.0019 for 1-3/4; +.0025/+.0021 for 2-1/4 to 2-3/4). amesweb's Type P table prints finished ODs that equal nominal plus these tolerances to within .0001 in on all 13 rows it has (13/64: .2046 against .2047). ID tolerance (standard bushings): +.0001/+.0004 in for #80 to 1/4 in, +.0001/+.0005 over 1/4 to 3/4, +.0002/+.0006 over 3/4 to 1-1/2, +.0003/+.0007 above; reamer bushings are looser. - Receiving hole: neither source gives a plate hole size. amesweb's page says to match the jig bore to the finished OD, ream it and press the bushing in with an arbor press; Carr Lane says the bushing is 'permanently pressed' and the head can be left exposed or recessed by counterboring. The mating row below gives the OD limits. - Disagreement: head sizes of H-10 to H-20, H-112 and H-144 are the same in Carr Lane and amesweb. For H-40 Carr Lane gives 51/64 × 7/32 and amesweb 47/64 × 3/16; for H-56 Carr Lane gives 1-7/64 × 1/4 and amesweb 63/64 × 1/4. The table shows amesweb's value in brackets and the files use Carr Lane's (the maker's catalogue). Carr Lane's ID ranges are decimals; amesweb gives drill names for the same series (checked on H-10: #80 to 1/16 = .0135 to .0625 in, and H-16: #40 to 9/64 = .0980 to .1406 in). - Files: 17 headed bushings (one per series H-10 to H-144) and 8 plain ones (P-16, 20, 26, 32, 40, 48, 64, 88) as revolved sleeves at nominal OD with the Carr Lane head Ø F × G. The ID and the body length of every file are Xem examples inside the published ranges (the file note says which); the head is a plain disc on the top; chamfers, the radius D and the counterbore (ANSI counterbores long small-ID bushings) are not drawn. - Left out: the extended-range sizes (Carr Lane's H-152 to H-224, outside ANSI), unground OD ('U'), liners, slip and renewable bushings, and the DIN 172 / 179 metric sizes (separate pages). series (H-nn / P-nn) OD, in (mm) OD max / min, in (nominal + tolerance) ID range, in length range (H), in head Ø F × thickness G (H only), in (mm) lengths listed for P, in (amesweb) 10 5/32 (3.97) 0.1578 / 0.1575 0.0135 – 0.0625 1/4 – 3/4 1/4 × 3/32 (6.35 × 2.38) 1/4 to 1/2 13 13/64 (5.16) 0.2047 / 0.2043 0.0135 – 0.0995 1/4 – 1 19/64 × 3/32 (7.54 × 2.38) 1/4 to 1/2 16 1/4 (6.35) 0.2516 / 0.2513 0.0980 – 0.1406 1/4 – 1-1/2 23/64 × 3/32 (9.13 × 2.38) 1/4 to 3/4 20 5/16 (7.94) 0.3141 / 0.3138 0.1250 – 0.1935 1/4 – 1-1/2 27/64 × 1/8 (10.72 × 3.17) 1/4 to 1 24 3/8 (9.52) 0.3766 / 0.3763 0.1935 – 0.2280 1/4 – 1 1/2 × 3/32 (12.70 × 2.38) — 26 13/32 (10.32) 0.4078 / 0.4076 0.1875 – 0.2570 1/4 – 1-3/4 1/2 × 5/32 (12.70 × 3.97) 1/4 to 1-3/8 28 7/16 (11.11) 0.4392 / 0.4389 0.2340 – 0.2900 1/4 – 1 9/16 × 3/32 (14.29 × 2.38) — 32 1/2 (12.70) 0.5017 / 0.5014 0.1875 – 0.3160 1/4 – 1-3/4 39/64 × 7/32 (15.48 × 5.56) 3/8 to 1-3/4 36 9/16 (14.29) 0.5642 / 0.5639 0.2950 – 0.3438 1/4 – 1 11/16 × 3/32 (17.46 × 2.38) — 40 5/8 (15.88) 0.6267 / 0.6264 0.3125 – 0.4375 1/4 – 2-1/8 51/64 × 7/32 (20.24 × 5.56) (amesweb: 47/64 × 3/16) 3/8 to 2-1/8 48 3/4 (19.05) 0.7518 / 0.7515 0.3125 – 0.5312 1/4 – 2-1/8 59/64 × 7/32 (23.42 × 5.56) 1/2 to 2-1/8 56 7/8 (22.22) 0.8768 / 0.8765 0.5000 – 0.6562 1/2 – 2-1/2 1-7/64 × 1/4 (28.18 × 6.35) (amesweb: 63/64 × 1/4) 1/2 to 2-1/8 64 1 (25.40) 1.0018 / 1.0015 0.5000 – 0.7656 1/2 – 3 1-15/64 × 5/16 (31.35 × 7.94) 1/2 to 2-1/2 80 1-1/4 (31.75) 1.2520 / 1.2517 0.8594 – 0.9375 5/8 – 2 1-1/2 × 1/4 (38.10 × 6.35) — 88 1-3/8 (34.92) 1.3772 / 1.3768 0.6250 – 1.0312 1/2 – 3 1-39/64 × 3/8 (40.88 × 9.52) 3/4 to 2-1/2 112 1-3/4 (44.45) 1.7523 / 1.7519 1.0000 – 1.3906 3/4 – 3 1-63/64 × 3/8 (50.40 × 9.52) 1 to 3 144 2-1/4 (57.15) 2.2525 / 2.2521 1.3750 – 1.7656 1 – 3 2-31/64 × 3/8 (63.10 × 9.52) 1 to 3 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Carr Lane Manufacturing: Head press-fit bushings (H): OD, ID range, lengths, F (head Ø) and G (head thickness), OD and ID tolerance tables; CAD on the part pages — web — Publisher's page; dimensions are facts — https://www.carrlane.com/product/drill-bushings/press-fit-bushings/head-press-fit-bushings-h - amesweb.info: Plain press-fit bushing dimensions, Type P (ASME B94.33): hole range, nominal OD, finished OD max / min, radius, body lengths with part numbers — web — Reference site; numbers only. Contains a few garbled cells — https://amesweb.info/bushing/plain-press-fit-bushing-dimensions-type-p.aspx - amesweb.info: Headed press-fit bushing dimensions, Type H (ASME B94.33): body OD, lengths, head diameter E and thickness F — web — Reference site; numbers only. Disagrees with Carr Lane on H-40 and H-56 heads — https://amesweb.info/bushing/headed-press-fit-bushing-dimensions.aspx - McMaster-Carr: Drill bushings (press-fit, headed and plain, inch and metric) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/drill-bushings/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 25 parts): https://xemstudio.com/files/hardware/drill-bushings-ansi-b94-33-p-h/index.json API: https://xemstudio.com/api/geometry?object=drill-bushings-ansi-b94-33-p-h