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R3 Series

R3 Series rodless actuators provide a robust design with an internal linear motion guide rail and built-in flexible seal to ensure reliable operation in industrial environments. Equipped for high loads or high acceleration with maximum duty cycle, the R3 Series is available with either belt drive for the most rapid moves or screw drive for the highest thrust capacity and repeatability.
Limited availability outside North America
Companion Products 

We designed our next-generation AKD® Series with the versatility, communications, power and bandwidth...

P7000 Series

Kollmorgen's P7000 stepper drives provide you servo-like system performance with the cost and simplicity...

Motors available for use with the R3 Series include:

  • Kollmorgen T22T and T31T Series hybrid stepper motors (P7000 drive recommended)
  • Kollmorgen R3-AKM23C, 23D, 42E, and 42G Series AKM™ brushless servo motors
  • NEMA 23, 34 and custom motor mounts


  • Max length: 2,743 mm (108 in)
  • Max thrust: 1,335 N (300 lbf), screw models
  • Max speed: 3,000 mm/s (120 in/s), belt models
  • Lead screw, ball screw or timing belt drives
  • Stepper, brushless servo and custom motor options
  • Internal bearings: recirculating on a precision-ground rail
  • Bearing housing: 6063-T6 aluminum, hard-anodized
  • Carriage assembly: 6063-T6 aluminum, hard-anodized
  • Guide housing: 6063-T6 aluminum, hard-anodized
  • Acme screw: 0.625" diameter alloy steel screw, lubricated bronze nut
  • Ball screw: 0.625" diameter hardened alloy steel screw; alloy steel, heat-treated ball nut
  • Helical gearing: alloy steel, case-hardened
  • Belt drive: 1.0" wide XL pitch polyurethane with steel reinforcement cords
  • Flexible seal: stainless steel band, elastomeric seal


  • Standard or custom lengths to 0.1 inches
  • English or metric carriage mount
  • Motor or screw brakes
  • Right or left side lube port
  • Single or dual carriages
  • Belt or helical gear, parallel or inline direct transmission
  • Water resistance protection
  • Magnetic home and limit sensors
MECHANICAL SPECIFICATIONS Ball Screw Drive Lead Screw Drive Belt Drive
Max. Stroke Length, mm (in) 2740 (108)
Profile, mm (in) 64 x 71 (2.5 x 2.8)
Guide Type Profile Rail
Screw Leads (in/rev) 0.5, 0.2 0.2, 0.125  
Screw Diameter (in/rev) 0.625 0.625  
Bearing 15 mm rail, 2 bearing blocks
PERFORMANCE SPECIFICATIONS Travel life standard: 25.4 km (1,000,000 in)
Max. Thrust Force, N (lbf) 1300 (300) 900 (200)
Max. Velocity, mm/s (in/s) 760 (30) 3000 (120)
Max. Carriage Load:  
Normal, N (lb) 440 (100)
Roll Moment, N-m (lb-in) 33.9 (300)
Pitch Moment, N-m (lb-in) 56.5 (500)
Repeatability, mm (in) +/-0.025 (0.001) +/-0.25 (0.010)
Max Duty Cycle (%) 100 60 100
Limit Sensors Optional Optional Optional
Std. Operating Temp Range, °C (°F) -28 to +60 (-20 to +140)
Environment IP 44 rated: Splash-proof, protected against ingress of solid particles greater than 0.040 <1 mm> diameter.
Title Language(s) Date Size Email
pdfR3 Ball Screw Specs en-US-revA English 173.39 KB
pdfR3 Belt Drive Specs en-US-revA English 172.75 KB
Title Language(s) Date Size Email
Kollmorgen R Series Linear Positioners Selection Guide English 01 Jan 2018 6.72 MB
Title Language(s) Date Size Email
R3 Series English