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NEMA 24 and NEMA 42 stepper motor frames: 60 mm and 110 mm face, hole spacing, pilot diameter, shaft sizes

What are the mounting dimensions of a NEMA 24 and a NEMA 42 stepper motor: face width, bolt hole spacing, pilot diameter and shaft diameter? · Standard part · basis: igus MOT-AN-S datasheet table (NEMA 24), Hallikainen and JLC Motion Control (NEMA 42), shafts from five makers; numbers only

Also called: NEMA 24 stepper motor dimensions, NEMA 24 bolt pattern, NEMA 24 mounting holes, NEMA 24 pilot diameter, NEMA 24 shaft diameter, NEMA 24 60mm stepper, NEMA 42 stepper motor dimensions, NEMA 42 bolt pattern, NEMA 42 mounting holes, NEMA 42 pilot diameter, NEMA 42 shaft diameter, NEMA 42 110mm stepper, 60mm stepper motor mounting, 110mm stepper motor mounting, NEMA 24 hole spacing 47.14, NEMA 42 hole

Exact dimensions. True size, with no tolerance added.

sizes
13 in table

Notes

  • 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.

NEMA 24 and NEMA 42 stepper motor frames: 60 mm and 110 mm face… size chart

framequantityvalue, mmsourcenote
NEMA 24face (flange) width60.0igus MOT-AN-S60.0 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 24mounting hole spacing (square)47.14igus MOT-AN-Ssame as NEMA 23 (47.14); tolerance +-0.2
NEMA 24mounting hole diameter4.5igus MOT-AN-S4 holes; NEMA 23 row of the same table shows 5.0, so hole size depends on the maker
NEMA 24pilot (register) diameter38.10igus MOT-AN-Ssame as NEMA 23 (38.10); tolerance +-0.025
NEMA 24shaft diameter8.00 (igus; Leadshine CM series text Ø8); 7.5 (Analog Devices QSH6018); 9.52 (Neoton 60BH); 10 (OMC 24HP / 24HS models)igus, Analog Devices, Neoton, OMCmakers disagree: take the shaft from the motor's own drawing
NEMA 24shaft length22.4 (QSH6018); 21 (OMC models)Analog Devices, OMCmaker-specific
NEMA 42face (flange) width110Nanotec ST11018, Motion Control Products, JLC Motion ControlJLC prints 4.2 in / 110 mm; Hallikainen shows a body diameter of 4.2 in (106.7 mm)
NEMA 42mounting hole spacing (square)88.9 (3.500 in, Hallikainen); 89 (JLC)Hallikainen, JLCsame dimension; bolt circle 4.950 in = 125.73 mm (Hallikainen) = spacing x 1.414
NEMA 42mounting hole diameter7.14 (0.281 in)Hallikainen onlysingle source
NEMA 42pilot (register) diameter55.5 (JLC); 55.52 (2.186 in, Hallikainen)JLC, Hallikainenthe two agree to 0.02 mm
NEMA 42pilot depth (max)1.6 (0.062 in)Hallikainen onlysingle source
NEMA 42shaft diameter16 (JLC); 0.625 in = 15.875 mm (Hallikainen and Anaheim 42D); 19 (JLC; Makers Electronics 110BYGH115 with keyway)JLC, Hallikainen, Anaheim, Makers Electronicsmakers disagree: 5/8 in (15.875) and 19 mm shafts both exist
NEMA 42body length99, 115, 150, 168, 201 (Motion Control Products models); 115 (Makers 110BYGH115)Motion Control Products, Makers Electronicsvaries with torque

Where the files are

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

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)webPublisher's page; dimensions are facts
JLC Motion ControlNEMA stepper motor sizes: face, hole spacing, pilot and shaftwebPublisher's page; dimensions are facts
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)webPublisher's page; dimensions are facts
NanotecSCB6018M4204-B: NEMA 24, flange 60 mm, D-shaft; STEP and PDF downloads on the pagewebPublisher's page; dimensions are facts
NanotecST11018L8004-B: NEMA 42, flange 110 mm, key shaft; STEP and PDF downloads on the pagewebPublisher's page; dimensions are facts
Analog Devices TrinamicQSH6018: flange 60 mm, shaft 7.5 mm, shaft length 22.4 mm, D-cut 20 mm x 0.5 mmwebPublisher's page; dimensions are facts
Anaheim Automation42D series NEMA 42 stepper motors: shaft diameter .625 inwebPublisher's page; dimensions are facts
OMC StepperOnlineNEMA 24 stepper motors (60 x 60 mm face, shaft 10 mm x 21 mm on the models listed)webPublisher's page; dimensions are facts
Motion Control ProductsNEMA 42 hybrid stepper motors (110 mm frame)webPublisher's page; dimensions are facts
Makers Electronics110BYGH115-6004 NEMA 42: shaft 19 mm with keyway, motor length 115 mmwebPublisher's page; dimensions are facts
Neoton Motor (DirectIndustry)NEMA 24 60BH motor: frame 60 mm, shaft 9.52 mm, body length 78 mmwebPublisher's page; dimensions are facts

Xem scan

File coming

No downloadable true-size file yet: the published figures do not fix the whole shape, and Xem never guesses a number. A measured scan is planned; request it and it moves up.

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Plain text: sheet.txt · JSON: /api/geometry?object=nema-24-and-nema-42-stepper-frames

hole pattern
Schematic, not to scale.

Fits with

NEMA 23 stepper motor: 56.4 mm face, 47.14 mm hole pattern, isometric render of a generated part
NEMA 23 stepper motor: 56.4 mm face, 47.14 mm hole pattern6 sizes★ 2 files
NEMA 17 stepper motor, isometric render of a generated part
NEMA 17 stepper motor42.3×42.3 mm★ 3 files
T8 lead screw Tr8×8 envelope, 100 to 400 mm, isometric render of a generated part
T8 lead screw Tr8×8 envelope, 100 to 400 mm6 sizes★ 6 files
length
Trapezoidal lead screw threads Tr10 to Tr40 (ISO 2904 / DIN 103): Tr10x2, Tr12x3, Tr16x4, Tr20x4, Tr24x5, Tr30x6, Tr40x7: pitch, d2, D4, d3, D144 sizes★ sheet
Acme threads 1/4-16 to 2-4 (ASME B1.5): 1/2-10, 5/8-8, 3/4-6, 1-5, 1-1/2-4, 2-4: major, pitch and minor diameter, pitch15 sizes★ sheet
Inch square and rectangular keys to 1-1/2 in (ANSI B17.1): 3/4, 7/8, 1, 1-1/4, 1-1/2 in square, 1/2 x 3/8, 1 x 3/4 in rectangular keys, shaft range and keyseat depth13 sizes★ sheet

Questions

What is the NEMA 24 bolt pattern?

Four holes on a 47.14 mm square (the same pattern as NEMA 23), 4.5 mm holes in the igus table, pilot 38.10 mm, face 60 mm.

What is the NEMA 42 bolt pattern?

Four holes on an 88.9 mm (3.500 in) square, pilot about 55.5 mm, face 110 mm; hole size 7.14 mm (0.281 in) on one source.

What is the NEMA 24 shaft diameter?

It depends on the maker: 8 mm (igus), 7.5 mm (Analog Devices QSH6018), 9.52 mm (Neoton 60BH), 10 mm (OMC).

What is the NEMA 42 shaft diameter?

Either 5/8 in (15.875 mm, Hallikainen and Anaheim) or 16 mm or 19 mm with a keyway, depending on the motor.

Is NEMA 24 the same mounting pattern as NEMA 23?

The hole spacing (47.14 mm) and pilot (38.10 mm) are the same in the igus table, but the face is 60 mm instead of 56.4 mm.