Stainless servo motor
B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ)
Hygienic 100% stainless steel servo motors to IP69K in sizes 3 to 6, designed to EHEDG and FDA guidelines with surface finish below 0.8 µm and EnDat 2.2 encoders.
Key specifications
| Ingress protection | IP69K |
|---|---|
| Feedback | optical or inductive EnDat 2.2 |
| Sizes | 3, 4, 5, 6 (lengths 1–5) |
| Material | stainless steel housing, flange, shaft and connectors |
| Mounting | 8JSB flange (B5), 8JSQ front (B14) |
Summarised in our own words from ABB's published data; series maxima, individual models vary. Last checked 2026-10-30. Source 1
Specify Motion is not affiliated with ABB. B&R Industrial Automation and 8JS stainless steel servo motors (8JSB / 8JSQ) are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Typical applications
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Our experienced engineers are on hand, ready to help with your project. Whether you need the B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ) itself, help sourcing it, or a modified or custom design built around your load, speed and space, tell us what the machine has to do and we'll come back with the right option.
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What a stainless servo motor is
A stainless servo motor is a permanent-magnet servo motor with a stainless steel housing and sealing designed for washdown and hygienic areas. Electrically it matches a standard AC servo, with a three-phase winding and encoder or resolver feedback, but the body is smooth, crevice-free and sealed, often to IP69K, with sealed cable exits and food-grade shaft seals. Many designs are rated for cleaning with high-pressure water and common cleaning chemicals.
When engineers choose a stainless servo motor
Choose a stainless servo for food, beverage, dairy and pharmaceutical machines where motors are in splash zones or are cleaned directly. Standard painted servos trap residue and corrode. The trade-offs are cost, thermal performance and choice: sealed stainless housings dissipate heat less well, so continuous torque may be derated, and fewer frame and feedback options are available. Where motors can sit outside the washdown zone, standard servos with guards may be cheaper.
How to specify the B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ)
Send these with your enquiry and an engineer can confirm the right 8JS stainless steel servo motors (8JSB / 8JSQ) variant or an equivalent:
- Continuous and peak torque (Nm) after derating
- Speed (rpm)
- Ingress protection (IP code)
- Cleaning chemicals and temperatures
- Stainless grade and surface finish
- Feedback and brake options
- Cable and connector sealing
Common mistakes to avoid
- Assuming continuous torque matches a standard servo of the same size
- Using non-hygienic couplings or brackets around a stainless motor
- Not matching cable and connector ratings to the motor
- Ignoring condensation from thermal cycling during cleaning
B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ): frequently asked questions
What is the B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ)?
Hygienic 100% stainless steel servo motors to IP69K in sizes 3 to 6, designed to EHEDG and FDA guidelines with surface finish below 0.8 µm and EnDat 2.2 encoders. It is made by ABB; Specify Motion can help source it or propose an equivalent.
Who makes the B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ)?
The B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ) is made by B&R Industrial Automation (ABB) and is listed here for engineers comparing options. Specify Motion is not affiliated with ABB; brand names are used only to identify the product.
Is there an alternative to the B&R Industrial Automation 8JS stainless steel servo motors (8JSB / 8JSQ)?
Yes. Our engineers can propose an equivalent built around your load, speed and environment. An engineer confirms the fit against your application before recommending anything.
Why do stainless servo motors have lower continuous torque?
A sealed stainless housing without cooling fins dissipates heat less effectively than a finned aluminium body. Since continuous torque is limited by winding temperature, stainless servos are often rated lower than standard motors of similar size. Check the derated figures at your ambient temperature.
Is IP69K required for a servo motor in a food plant?
It depends on the zone and cleaning method. Motors in splash zones or cleaned with high-pressure, high-temperature water typically need IP69K. Motors in dry zones or behind guards may only need IP65 or IP67. Follow the plant's hygienic zoning and cleaning procedures.
Further reading: Hygienic washdown actuators ip69k · How to select a servo motor · Servo and stepper motors
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