NEMA 24 and NEMA 42 stepper motor frames: 60 mm and 110 mm face, hole spacing, pilot diameter, shaft sizes — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/nema-24-and-nema-42-stepper-frames/ (sheet CC BY 4.0) Basis: igus MOT-AN-S datasheet table (NEMA 24), Hallikainen and JLC Motion Control (NEMA 42), shafts from five makers; numbers only Catalog version: 2026-10-20 Sizes: see table below - NEMA 24 (60 mm face) and NEMA 42 (110 mm face) steppers follow the NEMA ICS 16 convention that the name is the face width in tenths of an inch (24 = 2.4 in, 42 = 4.2 in). The face, hole pattern and pilot are fixed by the frame; shaft diameter, shaft length and body length are not, and the makers read for this page do not all agree. - Numbers: the NEMA 24 face, hole spacing, hole diameter and pilot come from the igus MOT-AN-S datasheet's dimensions table, whose column labels are not printed in the extract read; they were assigned by matching the NEMA 23 row of the same table to published NEMA 23 values (56.4 face, 47.14 spacing, 6.35 shaft, 38.10 pilot, as on the 'NEMA 8 to 34' page). The igus shaft column is therefore listed as read, with the other makers beside it; the igus length columns are not used. Nanotec's NEMA 24 and 42 pages link STEP and PDF files for each motor but their dimensional drawings are images, so no numbers come from them beyond the 60 mm and 110 mm flange size. NEMA 42 numbers come from Hallikainen's frame table (inches, converted here at exactly 25.4) and JLC Motion Control, which agree on the spacing and the pilot; the hole diameter and pilot depth are Hallikainen only. Hallikainen has no NEMA 24 row. - Numbers only, no files: no maker datasheet read prints the full outline of a NEMA 24 or NEMA 42 motor (pilot height, connector, shaft flat and body) in numbers, so the shape is not fully defined. For CAD, Nanotec's SCB6018M4204-B and ST11018L8004-B pages carry STEP downloads. - Left out: the NEMA 24 pilot height and the NEMA 42 shaft length, torque and current ratings, the shaft key and flat sizes, and the double-shaft versions. frame quantity value, mm source note NEMA 24 face (flange) width 60.0 igus MOT-AN-S 60.0 in the table; Nanotec SCB6018 and Analog Devices QSH6018 say 60 mm; QSH6018 max flange 60.5; the name NEMA 24 is 2.4 in = 60.96 mm NEMA 24 mounting hole spacing (square) 47.14 igus MOT-AN-S same as NEMA 23 (47.14); tolerance +-0.2 NEMA 24 mounting hole diameter 4.5 igus MOT-AN-S 4 holes; NEMA 23 row of the same table shows 5.0, so hole size depends on the maker NEMA 24 pilot (register) diameter 38.10 igus MOT-AN-S same as NEMA 23 (38.10); tolerance +-0.025 NEMA 24 shaft diameter 8.00 (igus; Leadshine CM series text Ø8); 7.5 (Analog Devices QSH6018); 9.52 (Neoton 60BH); 10 (OMC 24HP / 24HS models) igus, Analog Devices, Neoton, OMC makers disagree: take the shaft from the motor's own drawing NEMA 24 shaft length 22.4 (QSH6018); 21 (OMC models) Analog Devices, OMC maker-specific NEMA 42 face (flange) width 110 Nanotec ST11018, Motion Control Products, JLC Motion Control JLC prints 4.2 in / 110 mm; Hallikainen shows a body diameter of 4.2 in (106.7 mm) NEMA 42 mounting hole spacing (square) 88.9 (3.500 in, Hallikainen); 89 (JLC) Hallikainen, JLC same dimension; bolt circle 4.950 in = 125.73 mm (Hallikainen) = spacing x 1.414 NEMA 42 mounting hole diameter 7.14 (0.281 in) Hallikainen only single source NEMA 42 pilot (register) diameter 55.5 (JLC); 55.52 (2.186 in, Hallikainen) JLC, Hallikainen the two agree to 0.02 mm NEMA 42 pilot depth (max) 1.6 (0.062 in) Hallikainen only single source NEMA 42 shaft diameter 16 (JLC); 0.625 in = 15.875 mm (Hallikainen and Anaheim 42D); 19 (JLC; Makers Electronics 110BYGH115 with keyway) JLC, Hallikainen, Anaheim, Makers Electronics makers disagree: 5/8 in (15.875) and 19 mm shafts both exist NEMA 42 body length 99, 115, 150, 168, 201 (Motion Control Products models); 115 (Makers 110BYGH115) Motion Control Products, Makers Electronics varies with torque Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - igus (MOT-AN-S datasheet): MOT-AN-S 2-phase hybrid stepper motors, flange sizes 28, 42, 56, 60 and 86 mm: dimensions table (B1, B2, D1, D2, D3, L1 to L5) — web — Publisher's page; dimensions are facts — https://forum.duet3d.com/assets/uploads/files/1695998885806-steppers.pdf - JLC Motion Control: NEMA stepper motor sizes: face, hole spacing, pilot and shaft — web — Publisher's page; dimensions are facts — https://jlcmc.com/blog/nema-stepper-motor-sizes - Hallikainen (techref): NEMA stepper frame table: body diameter, bolt hole spacing, shaft, pilot diameter and depth, bolt circle, bolt hole size (NEMA 8 to 42; no NEMA 24 row) — web — Publisher's page; dimensions are facts — https://pic.hallikainen.org/techref/io/stepper/nemasizes.htm - Nanotec: SCB6018M4204-B: NEMA 24, flange 60 mm, D-shaft; STEP and PDF downloads on the page — web — Publisher's page; dimensions are facts — https://nanotec.com/us/en/products/10752-scb6018m4204-b - Nanotec: ST11018L8004-B: NEMA 42, flange 110 mm, key shaft; STEP and PDF downloads on the page — web — Publisher's page; dimensions are facts — https://nanotec.com/eu/en/products/595-st11018l8004-b - Analog Devices Trinamic: QSH6018: flange 60 mm, shaft 7.5 mm, shaft length 22.4 mm, D-cut 20 mm x 0.5 mm — web — Publisher's page; dimensions are facts — https://wcm-cce.cldnet.analog.com/en/products/qsh6018.html - Anaheim Automation: 42D series NEMA 42 stepper motors: shaft diameter .625 in — web — Publisher's page; dimensions are facts — https://anaheimautomation.com/media/anaheim/files/manuals/stepper/L011557_-_42D_Series_Spec_Sheet.pdf - OMC StepperOnline: NEMA 24 stepper motors (60 x 60 mm face, shaft 10 mm x 21 mm on the models listed) — web — Publisher's page; dimensions are facts — https://www.omc-stepperonline.com/nema-24-stepper-motor - Motion Control Products: NEMA 42 hybrid stepper motors (110 mm frame) — web — Publisher's page; dimensions are facts — https://motioncontrolproducts.com/electric-motors/stepper-motors/hybrid-stepper-motors/nema-42.html - Makers Electronics: 110BYGH115-6004 NEMA 42: shaft 19 mm with keyway, motor length 115 mm — web — Publisher's page; dimensions are facts — https://makerselectronics.com/ar/product/nema-42-stepper-motor-110bygh115-6004/ - Neoton Motor (DirectIndustry): NEMA 24 60BH motor: frame 60 mm, shaft 9.52 mm, body length 78 mm — web — Publisher's page; dimensions are facts — https://www.directindustry.com/prod/neoton-motor/product-4621460-2862354.html 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=nema-24-and-nema-42-stepper-frames