10 HP 1500 RPM Motor Price: DRG-132M-4 Technical Data and Mounting Options

The motor that the market calls a "10 HP 1500 rpm motor" corresponds to the DRG-132M-4 in the DRG catalogue: 7.5 kW, IEC 132M frame, 4 poles, rated speed 1460 rpm on the nameplate. Connected in delta on a 400 V supply it draws 14.3 A at full load, delivers 49.1 Nm rated torque at the shaft and provides twice that torque at start-up. The same electrical values apply to both the aluminium and the cast iron version; the difference between the two lies in the material and the operating environment.

This article is not a general "10 HP motor" guide; it walks through the nameplate and catalogue data of a single model line by line, explains how the dimensions transfer to the machine and when each mounting arrangement should be chosen. If you want to compare both housings and other power ratings before ordering, all 120 models on the Buy Electric Motors Online page are listed with the same data layout.

In short: this 1500 rpm class motor delivers twice the torque of its 3000 rpm equivalent; it is the preferred power point for belt drives, gearboxes and slow-running mechanisms.

DRG-132M-4 data sheet: what each nameplate line means

The values below are taken directly from DRG catalogue data. The current columns show the rated current of the same motor at three different supply voltages; as voltage rises, current falls for the same power.

The rows marked ≈ are the ratios multiplied by the rated values: 2.0 × 49.1 = 98.2 Nm; 2.3 × 49.1 ≈ 112.9 Nm; 7.5 × 14.3 ≈ 107 A. To compare current values with other power ratings you can use the motor current chart tool.

Torque and slip: where does the 1460 rpm figure come from?

The rotating field of a four-pole motor turns at 1500 rpm on a 50 Hz supply. The rotor cannot catch this speed; the difference is slip, and it grows as the load increases. Since the DRG-132M-4 runs at 1460 rpm at full load, slip is (1500 − 1460) / 1500 ≈ 2.7%. Motors searched for as "1450 rpm" or "1400 rpm" belong to this class as well; the figure on the nameplate is always the actual speed at rated load.

Torque is calculated directly from power and speed: M = 9550 × P / n = 9550 × 7.5 / 1460 ≈ 49.1 Nm. This result matches the catalogue value exactly. If your machine needs less than this, the motor runs below rated current; if it needs more, current rises and the overload protection trips.

Output speed example with pulleys

With a 100 mm motor pulley and a 250 mm machine pulley, the machine shaft turns at 1460 × 100 / 250 ≈ 584 rpm. If you calculate with 1500 you get 600 rpm; that 16 rpm difference creates a measurable deviation in conveyor speed or mixer speed. Use the nameplate speed when calculating ratios.

B3 foot dimensions and shaft: values to read before mounting on the machine

The foot mounting dimensions of the 132M frame are given in millimetres in the DRG catalogue. Check these letters before drilling the base frame or replacing an old motor:

The B dimension is 178 mm; on the 132S, the short version of the same 132 frame, it drops to 140 mm. If your old motor is a 132S the foot holes will not line up and you will need to drill additional holes in the base. The thread at the shaft end is M12×28; the pulley retaining bolt is chosen accordingly. For the general logic of shaft and key standards see our article on motor shaft diameter, key and coupling standards.

Mounting options: how B3, B5 and B35 change on this model

The DRG-132M-4 can be considered as foot-mounted (B3), large-flange (B5) and foot + flange (B35). The electrical values do not change with the mounting; what changes is the surface by which the motor connects to the machine.

• B3 (foot): Belt drives, coupled pumps and any application sitting on a base frame. The A, B, C, H dimensions above apply.
• B5 (flange): Gearbox input and flanged pump housings. For the 132 frame the flange outer diameter P is 300 mm, the bolt circle M 265 mm, the spigot diameter N 230 mm, the hole diameter S 14.5 mm, the spigot length T 4 mm and the flange thickness LA 14 mm.
• B35 (foot + flange): Arrangements bolted to a gearbox by the flange and also resting on a base frame; on vibrating machines the feet carry the weight of the motor.

To avoid repeating the general comparison of mounting types, we leave the details to the article on B3, B5, B14 and B35 mounting types. What matters here is that the flange dimensions of the 132M frame are the same as the 132S: the flange on the gearbox side does not change, only the motor length (L) increases.

Aluminium or cast iron?

The current, cos φ, torque, bearing and dimension values of the two versions are identical in the catalogue. The environment decides:

• Aluminium DRG-132M-4: lightweight housing; enclosed workshops, ventilation and series-production machines built by OEMs.
• Cast iron DRG-132M-4: rigid housing; quarries, mills and agricultural applications with impact, vibration, dust and outdoor conditions.

Which machines is it used on?

1460 rpm and 49.1 Nm is the operating range of machines that need high torque at medium speed. Typical examples:

• Belt conveyors and screw conveyors (with gearbox, B5 or B35)
• Mixers, feed mixers, mortar machines
• Belt-driven circular saws, planers and band saw benches
• Piston compressors and gear pumps
• Medium-size centrifugal fans (large impeller, low speed)

If the pump or fan speed needs to be around 2900, a 3000 rpm equivalent should be considered instead of this model; the logic of the pole difference is explained in our article on the difference between 2-pole and 4-pole motors.

Pre-order checklist

• Does the old motor's nameplate show 7.5 kW and 14xx rpm? (If it shows HP: 10 HP = 7.5 kW)
• On a 400 V supply the terminal connection will be delta; if star-delta starting is required, the 6 leads will be taken to the panel.
• Shaft 38 × 80 mm, key 10 mm: does the pulley or coupling hub fit?
• For B3, B = 178 mm; has the old hole spacing on the base been measured?
• For B5, have P 300 / M 265 / N 230 been verified on the gearbox flange?
• The overload relay will be set around 14.3 A for 400 V; has the cable size been checked for the distance with the cable size calculator?
• Is the environment dusty, subject to impact or outdoors? Has the housing material been chosen accordingly?

Motors at this power

• DRG-132M-4 – 7.5 kW – 1500 rpm (rated 1460) – aluminium housing, 132M
• DRG-132M-4 – 7.5 kW – 1500 rpm (rated 1460) – cast iron housing, 132M
• DRG-132S2-2 – 7.5 kW – 3000 rpm (rated 2930) – cast iron housing, 132S
• DRG-160M-6 – 7.5 kW – 1000 rpm (rated 970) – cast iron housing, 160M

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DRG Motor is an electric motor manufacturer and supplier; all three-phase models from 0.25 kW to 355 kW are included among the 120 models in our online store with the same catalogue data.

Frequently Asked Questions

How many amps does a 10 HP 1500 rpm motor draw?

The DRG-132M-4 draws 14.3 A at 400 V, 15.0 A at 380 V and 13.7 A at 415 V at full load. As the load decreases, the current falls below this value.

What is the shaft diameter of a 7.5 kW 4-pole motor?

On the 132M frame the shaft diameter is 38 mm, the shaft length 80 mm and the key width 10 mm. The shaft end thread is M12×28.

Is a 10 HP motor connected in star or delta at 380 volts?

This model has 400/690 V windings; on a 380–400 V supply it is connected in delta. Star connection is used only on a 690 V supply or during the starting step of star-delta starting.

What is the difference between the 132M and 132S frames?

The shaft height (132 mm), shaft and flange dimensions are the same; the longitudinal foot hole distance (B) is 178 mm on the 132M and 140 mm on the 132S, and the overall length of the 132M is longer (476 mm versus 438 mm).

For dimension confirmation, mounting type or model selection you can reach us on +90 (542) 666 11 11 or at [email protected], or use our contact page.