Washdown-rated motors are electric motors built to survive repeated high-pressure, high-temperature spray-downs without letting water, cleaning chemicals, or bacteria into the housing. For food robotics, they matter because any motor on a conveyor, pick-and-place arm, or mixer in a wet processing area has to get hosed off daily without failing or becoming a contamination risk.
The rating that defines this category is IP69K, and it is a demanding one. Fabrico's explainer on the standard describes a test where the motor sits on a rotating turntable while water at 80°C hits it at 80–100 bar and 14–16 liters per minute from a nozzle held 10–15 cm away, aimed at four angles for 30 seconds each. The test traces to DIN 40050-9 and ISO 20653 rather than the base IEC 60529 ingress table that governs ordinary IP ratings.
Table of Contents
- Why Food Robotics Needs a Different Motor
- IP69K Is About Water, Not Food Safety
- What the Hardware Actually Looks Like
- Matching the Motor to the Application
- The Market Context Behind the Push
- Frequently Asked Questions
Why Food Robotics Needs a Different Motor
A robot arm or conveyor motor on a factory floor making electronics or textiles never gets sprayed with hot water under pressure. One handling raw meat, dairy, or produce does — often several times a shift, as part of mandatory sanitation between runs. A standard motor's seals and bearings degrade under that treatment, letting moisture in and eventually causing a short or seized bearing.
That operating reality is why major motion-control vendors built dedicated product lines rather than retrofitting standard motors. Rockwell Automation's Kinetix MPS stainless-steel servo motors are rated IP66, IP67, and IP69K and are built to withstand 1,200-psi washdown, and Rockwell markets them specifically for food, beverage, dairy, and pharmaceutical lines. Siemens' SIMOTICS S-1FS2 line takes the same approach, rating the motor body IP66/67 and the housing IP69K. A motor that is merely "sealed" or marketed as "water-resistant" without a stated IP69K test result has not been through this regimen and should not be assumed to survive it.
IP69K Is About Water, Not Food Safety
IP69K only certifies that water and dust stay out of the housing under the test conditions described above. It says nothing about whether the motor's exterior is safe to have near food, which is a separate and equally important requirement for food robotics buyers. Every major vendor treats the two as distinct problems and addresses them with separate certifications layered on top of IP69K.
Kollmorgen's AKMH servo motor line is one example: it is built from FDA-approved food-grade materials and meets EHEDG hygienic-design standards in addition to IP69K, and its housing is smooth with no flat surfaces or crevices where residue or bacteria could collect, according to Kollmorgen's product information. Siemens pairs its IP69K rating with a 1.4404 (AISI 316/316L) stainless housing, EPDM seals, and NSF H1-approved bearing grease, engineered to meet 3-A and EHEDG food-hygiene requirements, per Siemens' washdown motor coverage. A motor missing any one of these three can still be the wrong choice for a direct food-contact zone, even with a valid IP69K badge.
- Check for IP69K alone: confirms water/dust ingress protection only.
- Check for EHEDG or 3-A certification: confirms the hygienic geometry of the housing itself.
- Check for FDA-material or NSF H1 lubricant compliance: confirms what happens if the motor's exterior or grease contacts food directly.
What the Hardware Actually Looks Like
Washdown motors share a few physical traits that separate them from standard industrial motors, and these traits show up across every vendor's line. ABB's Baldor-Reliance food-safe stainless motors are built to exceed IP69K with smooth contours, and their feet are welded on rather than bolted, eliminating the crevices where bacteria can collect during high-pressure sanitary cleaning, according to ABB's newsroom announcement. That welded-rather-than-bolted detail matters more than it sounds: a bolted joint has a seam, and a seam under repeated hot-water spray is exactly where moisture and residue accumulate over months of use.
Stainless steel housings (304 or 316 grade) resist the corrosion that washdown chemicals and salt-heavy food residues cause in standard painted-steel enclosures. Bison Gear & Engineering's IP69K stainless-steel washdown line spans 1/6 to 2 HP, runs IE3 efficiency, and is designed to pair with matching washdown gearboxes and inverter drives, per Motion Control Tips' coverage of the Bison line. That range covers smaller conveyor and mixer applications rather than the larger servo work Rockwell and Kollmorgen target, which is a practical sizing distinction for an integrator comparing lines.
Matching the Motor to the Application
Not every motor on a food-processing line needs the same level of protection. A servo motor directly over a conveyor belt in a meat-cutting room faces daily hot-water-and-chemical washdown; a motor in a drier back-of-house utility area may only need splash protection.
Specifying IP69K everywhere adds cost without adding value in zones that never see high-pressure spray. Getting this wrong in either direction has a cost: underspecifying risks premature motor failure and unscheduled downtime on a production line; overspecifying adds unnecessary equipment cost across every motor on the line.
- Direct washdown zones (cutting lines, mixers, packaging areas sprayed daily): IP69K plus EHEDG/3-A housing design is the baseline.
- Direct food contact or near-contact surfaces: add FDA-material compliance and NSF H1 lubricant, as Siemens and Kollmorgen do.
- Splash-only or utility areas: IP66/IP67 motors, without the full IP69K housing, may be adequate and less expensive.
- Servo-level precision motion (pick-and-place, robotic arms): Rockwell's Kinetix MPS and Kollmorgen's AKMH are built for this; Bison's line targets fixed-speed conveyor and mixer drives instead.
The Market Context Behind the Push
Food-safety compliance is driving real investment in this motor category, not just incremental product updates. The Business Research Company projects the washdown-rated robotics market, which includes meat and poultry processing as a named end-use segment, to grow from $1.95 billion in 2025 to $2.2 billion in 2026 — a 12.5% compound annual growth rate — and reach $3.55 billion by 2030, according to the firm's market report. That growth rate signals that washdown-rated components are moving from a specialty niche into a standard line item for food-processing automation projects, which is also why four separate major vendors — Rockwell, Kollmorgen, Siemens, and ABB — now carry dedicated product lines rather than offering washdown as a custom modification.
Frequently Asked Questions
Does an IP69K rating mean a motor is safe to touch food directly?
No. IP69K certifies only resistance to high-pressure, high-temperature water and dust ingress. Direct food contact requires separate FDA-material or NSF H1 lubricant compliance, which vendors like Kollmorgen and Siemens certify in addition to IP69K.
Is every motor on a food-processing line required to be IP69K-rated?
No. Motors in direct washdown zones need it, but motors in splash-only or utility areas may only need IP66 or IP67, which typically costs less.
What is the practical difference between IP66/IP67 and IP69K?
IP66/IP67 test against lower-pressure water jets without the 80°C, 80–100 bar washdown-specific test that IP69K requires under DIN 40050-9/ISO 20653, so IP69K motors are built to survive the harsher sanitation cycles used in food plants.
