EGS Low-Profile Precision Rail

Sept. 25, 2023
Haydon Kerk Pittman's low-profile precision rail works in lab automation and electronic assembly for efficient point-to-point motion applications.

The EGS04 low-profile precision rail is an “efficient guided system” that's suited for customers in lab automation and electronic assembly where applications require high speed and highly efficient point-to-point motion. Its stage base combines RGS-style screw supports and a ball-bearing profile rail for a lower carriage ride (<0.6 in. (16 mm)), higher speed capability, and more efficient, stiffer load support than competitor products.


It provides a less complex and up to 50% smaller alternative to more traditional belt and gearbox designs and offers the advantage of an easily integrated bolt-in design to eliminate facets of a multi-component design.


  • Travel stroke up to 3 ft (1 m)
  • Mechanical advantage of a screw drive
  • Configuration options:
    • NEMA size 11 and 17 hybrid stepper motors
    • BLDC 42mm motors
    • IDEA integrated drive options
    • Non-motorized
    • Standard and long carriages
    • Various screw leads
    • Rotary encoders
EGS04 Load SpecificationsDesign Payload15 lb. (7 kg)Axial Force 133 N  (30 lb-f)Roll Moment3 N-m (27 lbf-in)Pitch Moment5 N-m (46 lbf-in)Yaw Moment3 N-m (26 lbf-in)Repeatability+/-25 µm (0.001 in.)Size 11: 28 mm (1.1 in) Motor 1.8 degreeSeriesE28M4-VStack LengthDoubleWiringBipolarStep Angle1.8-deg.Winding Voltage2, 5, 12V DCCurrent/Phase1.9, 0.75, 0.35 A rmsResistance/Phase1.1 6.7 34.8 ?Inductance/Phase1.1, 5.8, 35.6 mhPower Input7.5 WMotor Rotor Inertia13.5 gcm2Size 17: 43 mm (1.7 in) Motor 1.8 degreeSeriesE43H4-VE43M4-VStack LengthSingleDoubleWiringBipolarStep Angle1.8-deg.Winding Voltage2.33, 5, and 12V DCCurrent/Phase1.5, 0.7, 0.29 A rms2.6, 1.3, 0.55 A rms Resistance/Phase1.56, 7.2, 41.5 ?0.9, 3.8, 21.9 ?Inductance/Phase1.9, 8.7, 54 mH1.33, 8.21, 45.1 mHPower Input7 W10.4 WMotor Rotor Inertia37 gcm278 gcm2EC042B Motor DataMax DC Terminal Voltage96V Max Speed (Mechanical)9,000 rpmContinuous Stall Torque0.064 Nm / 9.0 oz-in.Peak Torque (Max.)0.38 Nm / 54 oz-in.Coulomb Friction Torque0.0014 Nm / 0.20 oz-inViscous Damping Factor3.4E-06 V/(rad/s) / 0.050 oz-in/krpmThermal Time Constant5.1 minThermal Resistance196°F (9.1°C/W)Max. Winding Temp.221°F (105°C)Rotor Inertia1.4E-05 kg-m2/0.0021 oz-in-s2Motor Weight340 g (12 oz.)