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Printable IEC motor frame size chart

Every IEC frame from 63 to 355: shaft height, foot hole spacing, shaft size and the kW normally built on it, plus B3/B5/B14. One sheet, fits A4 and US Letter.

Download Excel (.xlsx) Print, or choose “Save as PDF” in the print dialog. The Excel file has every table as its own sortable tab.

IEC motor frame sizes

Frames 63–355 · shaft height, foot holes, shaft · kW per frame · mounting codes

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Foot-mounted frames, IM B3 — all dimensions in mm

FrameHABCKD×ED×E 2pkW 2pkW 4p
63631008040711×23=0.18–0.250.12–0.18
71711129045714×30=0.37–0.550.25–0.37
8080125100501019×40=0.75–1.10.55–0.75
90S90140100561024×50=1.51.1
90L90140125561024×50=2.21.5
100L100160140631228×60=32.2–3
112M112190140701228×60=44
132S132216140891238×80=5.5–7.55.5
132M132216178891238×80=—7.5
160M1602542101081542×110=11–1511
160L1602542541081542×110=18.515
180M1802792411211548×110=2218.5
180L1802792791211548×110=—22
200L2003183051331955×110=30–3730
225S2253562861491960×140=—37
225M2253563111491960×14055×1104545
250M2504063491682465×14060×1405555
280S2804573681902475×14065×1407575
280M2804574191902475×14065×1409090
315S3155084062162880×17065×140110110
315M3155084572162880×17065×140132132
315L3155085082162880×17065×140160–200160–200
355M35561056025428100×21075×140250250
355L35561063025428100×21075×140315315

Mounting codes (IEC 60034-7)

CodeMounting
B3Feet, horizontal shaft
B5Large flange (FF), through holes, no feet
B14Small face flange (FT), tapped holes, no feet
B35Feet and B5 flange
B34Feet and B14 face
V1B5 flange, shaft down
V5Feet on a wall, shaft down

H = shaft centre height above the feet, and the frame number: a 132 frame has its shaft 132 mm up. A = foot holes across the shaft, B = along it, C = shaft shoulder to the nearest foot holes, K = foot hole. S, M and L are short, medium and long feet on the same height. D×E = shaft diameter × length; “=” means the 2-pole shaft is the same.

Same frame, same holes, same shaft: any maker's 4 kW 112M bolts down where the old one was. Check the power, speed and mounting on the nameplate before you order.

Dimensions to IEC 60072-1; kW per frame is the usual EN 50347 assignment at 50 Hz, and a high-efficiency motor can be one frame larger. The maker's dimension drawing wins over this sheet.

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Related: Three-Phase Power Calculator · Motor Full-Load Current Chart · How to read a motor nameplate · How to choose a motor · Motor register workbook

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