MPL-B420P-MK74AA
460 V, 115 mm, 5,000 rpm, brake
Refurbished, testedAllen-Bradley MP-Series low-inertia servo motor
MPL-B420P-MK72AA Allen-Bradley MPL servo motor
MPL-B420P-MK72AA is an Allen-Bradley MP-Series low-inertia servo motor: 400 V class (460 V), 115 mm frame, 5,000 rpm rated speed, multi-turn absolute, high-resolution (1024 sin/cos), Hiperface feedback, keyless (smooth) shaft, SpeedTEC DIN connectors and no brake. Star Automations holds this part number in stock, refurbished and tested in working condition. WhatsApp the part number for photos of the actual unit, the test evidence and a quote, or send your existing motor for repair-return.
01Catalogue number
What MPL-B420P-MK72AA means, position by position
Every character in an MPL catalogue number describes the motor. Read it left to right and check it against the nameplate of the motor you are replacing.
| Position | Code | Meaning |
|---|---|---|
| Series | MPL | MP-Series low-inertia permanent-magnet servo motor |
| Voltage class | B | 400 V class (460 V) |
| Frame size | 4 | 115 mm frame |
| Magnet stack length | 20 | 2.0 in (50.8 mm) |
| Rated speed | P | 5,000 rpm |
| Feedback | M | multi-turn absolute, high-resolution (1024 sin/cos), Hiperface |
| Shaft | K | Keyless (smooth) shaft |
| Connector | 7 | Speedtec din connectors, right-angle, rotatable |
| Brake | 2 | No brake |
| Factory options | AA | Standard IEC metric mounting flange |
02Photos
MPL-B420P-MK72AA photos
03Related part numbers
MPL-B420P family: keyed or keyless, with or without brake
These catalogue numbers share the 115 mm frame, magnet stack and 5,000 rpm winding of MPL-B420P-MK72AA. They differ in shaft, brake, connector or feedback. A motor with the wrong shaft or no brake will not drop into the same machine, so match every position.
| Catalogue number | Shaft | Brake | Connector | Feedback | Note |
|---|---|---|---|---|---|
| MPL-B420P-MK72AA | Keyless (smooth) shaft | No brake | SpeedTEC | Multi-turn absolute | This part (in stock) |
| MPL-B420P-MJ72AA | Keyed shaft | No brake | SpeedTEC | Multi-turn absolute | Same family |
| MPL-B420P-MJ74AA | Keyed shaft | 24 v dc holding brake | SpeedTEC | Multi-turn absolute | Same family |
| MPL-B420P-MK74AA | Keyless (smooth) shaft | 24 v dc holding brake | SpeedTEC | Multi-turn absolute | Same family |
| MPL-B420P-MK22AA | Keyless (smooth) shaft | No brake | Bayonet | Multi-turn absolute | Bayonet-connector version |
| MPL-B420P-SK72AA | Keyless (smooth) shaft | No brake | SpeedTEC | Single-turn absolute | Other feedback type |
| MPL-A420P-MK72AA | Keyless (smooth) shaft | No brake | SpeedTEC | Multi-turn absolute | 230 V version, if built in this frame |
Not every combination is built or still offered. The table shows how the catalogue number changes, not a list of parts we hold. If you need one of these variants, send the part number and we check stock and sourcing.
04Drives and cables
Drives and cables used with MPL-B420P-MK72AA
Rockwell's compatibility tables list MPL motors with Kinetix 300, 350, 2000, 5100, 5300, 5500, 5700, 6000, 6200 and 6500 drives. Older machines often run MPL motors on Ultra3000 drives. The drive must be configured for this exact motor catalogue number, and some newer drives need a feedback converter for Hiperface motors; check the drive manual.
This motor has SpeedTEC connectors, so it takes the SpeedTEC cable families listed here.
This motor has no brake. On a vertical axis, a motor without a brake is not a substitute for one with a brake.
- Power cable: 2090-CPBM7DF or 2090-CPWM7DF series
- Feedback cable: 2090-CFBM7DF or 2090-CFBM7DD series
- Continuous-flex versions for cable chains
- Feedback: multi-turn absolute encoder, read by the drive at power-up
05Your options
Three ways to get the axis running again
Buy from our stock
We hold MPL-B420P-MK72AA, refurbished and tested in working condition. Photos of the actual unit and the test evidence come with the quote.
Repair-return your motor
Send your own motor. We test it, repair bearings, brake, encoder or connectors, align the encoder, and load-test it before it goes back. Allen-Bradley servo motor repair.
Exchange
Take a tested unit now and send your failed motor back to us. How exchange works.
06Before you order
Check these on your old motor's nameplate
| Check | Why it matters |
|---|---|
| Full catalogue number, including the last four characters | Shaft, connector and brake are coded at the end. Two motors that differ in those positions are not interchangeable. |
| Series letter (for example Ser. A, B) | Later series can differ in details; we confirm before you order. |
| Voltage class (A or B) | A 230 V motor on a 460 V drive, or the reverse, will not work. |
| Feedback type | The drive is set up for one feedback type. Multi-turn and single-turn are not interchangeable without changing the configuration. |
| Brake | A vertical or loaded axis needs the brake to hold position when power is off. |
Allen-Bradley, Kinetix and MP-Series are trademarks of Rockwell Automation. Star Automations is an independent supplier and repairer and is not affiliated with Rockwell Automation. Catalogue-number meanings are taken from Rockwell's published MPL literature.
What does MPL-B420P-MK72AA mean?
MPL-B420P-MK72AA is an Allen-Bradley MP-Series low-inertia servo motor: 400 V class (460 V), 115 mm frame, 5,000 rpm rated speed, multi-turn absolute, high-resolution (1024 sin/cos), Hiperface feedback, keyless (smooth) shaft, SpeedTEC DIN connectors and no brake.
Is MPL-B420P-MK72AA the same as MPL-B420P-MK74AA?
No. The last digit before AA is the brake code. MPL-B420P-MK72AA has no brake; the other part has a 24 V DC brake. Everything else is the same.
Which drives run MPL-B420P-MK72AA?
Rockwell lists MPL motors with Kinetix 300, 350, 2000, 5100, 5300, 5500, 5700, 6000, 6200 and 6500 drives, and older machines use Ultra3000. The drive must be set up for this motor's catalogue number.
Do you have MPL-B420P-MK72AA in stock?
Yes, refurbished and tested in working condition. WhatsApp MPL-B420P-MK72AA to +91 97866 22233 for photos of the actual unit, the test evidence and a quote.
Can you repair my MPL-B420P-MK72AA instead?
Yes. We repair Allen-Bradley MPL motors: bearings, brakes, encoders and connectors, with encoder alignment and a load test before the motor goes back. Warranty terms are stated on each quotation.
Need MPL-B420P-MK72AA? Send the part number and quantity.
WhatsApp MPL-B420P-MK72AA and the quantity to +91 97866 22233, or email info@starautomations.com.