IEC 80 Frame Motors: 801/802 Models

DRG Motor offers 11 three-phase models in the IEC 80 frame: the 801 sub-code covers 0.37 kW (6-pole), 0.55 kW (4-pole) and 0.75 kW (2-pole); the 802 sub-code covers 0.55 kW, 0.75 kW and 1.1 kW. All of them share an 80 mm shaft centre height, a 19×40 mm shaft and 125×100 mm foot hole spacing; the B5 flange has a 200 mm outside diameter, 130 mm spigot and 165 mm bolt circle.

Grey DRG three-phase asynchronous electric motor illustrating IEC 80 frame motors

Every model is listed by power and speed in the online motor shop, and the same motors appear together in the three-phase asynchronous electric motors category. The aluminium versions are also grouped under aluminium housing motors.

Which DRG motors are built on the 80 frame?

This is the frame you meet most often around 1 kW: small conveyors, mixers, fans, circulation pumps and gearbox inputs. DRG has 6 aluminium and 5 cast iron frame-80 motors, all wound for 230/400 V (Δ/Y). Each model code in the table links to its product page.

Model	Power	Speed class / rated speed	Housing
DRG-801-6-AL	0.37 kW (0.5 HP)	1000 / 890 rpm	aluminium
DRG-801-4-AL	0.55 kW (0.75 HP)	1500 / 1400 rpm	aluminium
DRG-801-2-AL	0.75 kW (1 HP)	3000 / 2880 rpm	aluminium
DRG-802-6-AL	0.55 kW (0.75 HP)	1000 / 890 rpm	aluminium
DRG-802-4-AL	0.75 kW (1 HP)	1500 / 1420 rpm	aluminium
DRG-802-2-AL	1.1 kW (1.5 HP)	3000 / 2880 rpm	aluminium
DRG-801-4-GG	0.55 kW (0.75 HP)	1500 / 1400 rpm	cast iron
DRG-801-2-GG	0.75 kW (1 HP)	3000 / 2880 rpm	cast iron
DRG-802-6-GG	0.55 kW (0.75 HP)	1000 / 890 rpm	cast iron
DRG-802-4-GG	0.75 kW (1 HP)	1500 / 1420 rpm	cast iron
DRG-802-2-GG	1.1 kW (1.5 HP)	3000 / 2880 rpm	cast iron

“Speed class” is the synchronous speed group, while “rated speed” is the actual speed printed on the nameplate at rated load. DRG-801-4, for example, is in the 1500 rpm class but its rated speed is 1400 rpm; for DRG-802-4 it is 1420 rpm.

801 versus 802

Frame 80 is a single shaft height; 801 and 802 distinguish two core lengths (power steps) inside that frame. At the same pole count, the 802 is one step stronger than the 801:

Poles (speed class)	801 sub-code	802 sub-code
2 (3000 rpm)	DRG-801-2 – 0.75 kW	DRG-802-2 – 1.1 kW
4 (1500 rpm)	DRG-801-4 – 0.55 kW	DRG-802-4 – 0.75 kW
6 (1000 rpm)	DRG-801-6 – 0.37 kW	DRG-802-6 – 0.55 kW

In DRG product data the 801 and 802 share the same B3 dimensions: 125×100 mm foot spacing, 167 mm housing diameter and 304 mm overall length are recorded for both. Moving from 801 to 802 therefore changes power, current and torque, not the mounting dimensions. If you are replacing a different motor on an older machine, still measure the length and terminal box position on site.

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Same kW, different motor: the 0.55 and 0.75 kW trap

Two power ratings exist as two different motors on this frame. 0.55 kW is available as DRG-801-4 (4-pole, 1400 rpm) and as DRG-802-6 (6-pole, 890 rpm); 0.75 kW as DRG-801-2 (2-pole, 2880 rpm) and as DRG-802-4 (4-pole, 1420 rpm). An order that only says “0.75 kW frame 80” leaves open whether you get 2880 or 1420 rpm — twice the speed or half the torque at the machine. Always state speed or pole count together with kW.

Torque values below come from the product records and agree with T = 9550 × P / n (P in kW, n rated speed in rpm). Example: 9550 × 0.75 / 1420 ≈ 5.04 Nm.

Type	Power / rated speed	Current at 400 V	Torque
DRG-801-2	0.75 kW / 2880 rpm	1.64 A	2.49 Nm
DRG-802-2	1.1 kW / 2880 rpm	2.31 A	3.65 Nm
DRG-801-4	0.55 kW / 1400 rpm	1.31 A	3.75 Nm
DRG-802-4	0.75 kW / 1420 rpm	1.75 A	5.04 Nm
DRG-801-6	0.37 kW / 890 rpm	1.04 A	3.97 Nm
DRG-802-6	0.55 kW / 890 rpm	1.43 A	5.9 Nm

Currents are for 400 V star connection. For overload setting and cable sizing use the motor current chart and the motor cable size calculator.

Aluminium or cast iron?

On frame 80 each type has the same electrical data in both housing materials, so the choice depends on the environment. Aluminium is light and puts less load on the support when the motor hangs from its flange. Cast iron is preferred where there is vibration, possible impact or dust. One exception: DRG-801-6 (0.37 kW, 6-pole) is offered in aluminium only; there is no cast iron version. See the aluminium vs cast iron housing comparison for the material differences.

B3 foot-mounting dimensions

For foot (B3) mounting the base holes and centre height decide the fit. Values from DRG product records:

Dimension	Meaning	Value
H	Shaft centre height (from base)	80 mm
A	Foot hole spacing, across	125 mm
B	Foot hole spacing, lengthwise	100 mm
C	Shaft shoulder to nearest foot hole	50 mm
K	Foot holes	4–Φ10
AC	Housing diameter	167 mm
AD	Axis to top of terminal box	147 mm
L	Overall length	304 mm

Bearing record: 6204-ZZ-C3; cable entry: 1 × M20×1,5. Dimensioned drawings are available in the 2D technical drawings and the DRG technical catalogue. How to read these dimensions before ordering is explained in the frame size order guide.

The 19×40 shaft and key dimensions

All DRG frame-80 models — 2, 4 and 6-pole — carry the same shaft. Swapping an 801 for an 802 does not require a new coupling or pulley; moving from frame 71 or 90 does change the shaft size (see the shaft diameter by kW table).

Dimension	Meaning	Value
D × E	Shaft diameter × length	19 × 40 mm
F	Key width	6 mm
G	Keyway bottom dimension	15.5 mm
GA	Shaft + key height	21.5 mm
DH	Shaft end thread	M6×16

B5 flange dimensions and a note on B14

With a B5 (large flange, FF) connection four dimensions are checked separately: outside diameter P, spigot N, bolt circle M and hole diameter S. The DRG catalogue row for frame 80:

Dimension	Meaning	Value
P	Flange outside diameter	200 mm
N	Spigot (pilot) diameter	130 mm
M	Bolt circle diameter	165 mm
S	Flange hole diameter	12 mm
T	Spigot length	3.5 mm
LA	Flange thickness	12 mm

The B5 catalogue row lists terminal box height AD 154.5 mm and cable entry 1–M25×1.5, while the B3 product record shows AD 147 mm and 1 × M20×1,5. If space above the terminal box is tight, have this value confirmed when ordering. Flanges for all frames are in the B5 motor flange dimensions table; the FF/FT difference is covered in B5 and B14 flange hole difference.

B14 small-flange dimensions are not tabulated in the DRG catalogue, so no B14 values are given here. If you need B14 or B34, measure the flange outside diameter, bolt circle, spigot diameter and thread on your machine and send them via WhatsApp so we can confirm. A general comparison is in B3, B5, B14 and B35 mounting types.

Checklist for gearbox, pump or machine connection

A frame-80 motor is often fitted to a gearbox input. The gearbox size code alone does not prove a match: gearboxes with the same size code can have different input bores and flanges depending on the maker, ratio and input adapter. That is why we do not publish a fixed “gearbox size → motor frame” table; instead compare what you read on the gearbox plate and input flange with the DRG data below. Permissible input power and load must also be checked on the gearbox plate.

Check	Read on the machine / gearbox input	DRG 80 value
Shaft	Input bore diameter and depth	19 × 40 mm
Key	Keyway width	6 mm
Flange OD	Adapter/flange outside diameter	P 200 mm
Spigot	Pilot recess diameter	N 130 mm
Holes	Bolt circle and hole diameter	M 165 / S 12 mm
Feet	Foot hole spacing, centre height	125×100 mm, H 80 mm

DRG Motor is an electric motor manufacturer, supplier and seller; it does not sell gearboxes, only the motor. Matching a flange motor to a gearbox is detailed in flange motor for gearbox selection, and motors for worm gearboxes are grouped on this page.

What to confirm before ordering

Speed or pole count together with power (0.55 and 0.75 kW each exist as two models).
Mounting: B3 feet, B5 flange or both; flange dimensions if B14 is needed.
That the 19×40 mm shaft and 6 mm key suit the driven part.
Housing material; 0.37 kW 6-pole is aluminium only.
Supply: motors on this frame are wound for 230/400 V (Δ/Y).

Send a photo of your existing nameplate plus the shaft/flange dimensions and we will work out together whether you need an 801 or an 802.

Send a photo of your current motor nameplate and we will find the suitable DRG model together.Send on WhatsApp

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Frequently asked questions

Can an 802 replace an 801?

In DRG data both sub-codes have identical foot, shaft and length dimensions, so the swap is not a dimensional problem. The 802 draws more current, however; check the overload setting and cable size against the new current.

Is there a 1.5 kW motor on frame 80?

The highest power on DRG frame 80 is 1.1 kW (DRG-802-2, 2-pole). Higher ratings start on frame 90 and up; for prices by frame see the price list by frame number.

The plate says 1400 rpm — is it a 1500 rpm motor?

Yes. A 4-pole motor has a synchronous speed of 1500 rpm; slip under load gives a lower nameplate figure. On frame 80 it is 1400 rpm for DRG-801-4 and 1420 rpm for DRG-802-4.

Should I choose a B5 flange by spigot or by outside diameter?

By both. The outside diameter (200 mm) decides whether the flange fits, the spigot (130 mm) centres the shaft, and the bolt circle (165 mm) and hole diameter (12 mm) decide whether the bolts line up. One matching value does not guarantee the others.

Electric Motors Related to This Topic — Models and Current Prices

Suitability is not decided by power alone: compare the speed, voltage, mounting, shaft and fixing dimensions of your machine with the product data; if unsure, send us the nameplate of your current motor.