Precision Ground Ball Screw

  • Ultra-compact, small stroke, rod-type actuator (palm-sized).
  • Ideal for application such as electronically powering micrometer heads.
  • Precision ground ball screw or precision lead screws are used, resulting in high precision and high resolution.
  • Even for small size, A built in photo sensor (CW, CCW) is at both ends.
  • Plastic parts are used, enabling low-cost construction.(SA 5-28 RT)
  • Metal parts and 0.5mm lead ball screw are used, resulting in high rigidity and ultra-precision.(SA MP 5-28 RT)

Specifications


Model Units SA 5-28 RT SA MP 5-28 RT
Stroke (mm) 10
Repeated positioning accuracy (mm) ±0.005  ±0.002 
Axial Thrust N(kgf) 29.4(3.0) 29.4(3.0)
Maximum Speeds (mm/sec) 5 10
Drive System Lead screw, M4, pitch:0.5mm Precision ground ball screw, lead:0.5mm
Motor Five-phase stepping motor, 0.35A/Phase (28mm x 28mm)
Initial lost motion (mm) 0.01 max. 0.005 max.
Lead (mm) 1
Resolution (mm/step) 0.001 (For full step)
Weight (kg) 0.2 0.27
Sensor   Photo micro sensor (2 points, motor side and opposite side): 5V DC, 50mA
Operating temperature range (°C) 0 ~ 40

Maximum load moments -
Mp: Permissible moment in screw direction; My: Permissible yaw moment;
Mr: Permissible rolling moment

Specifications Diagram


SA 5-28 RT


SA MP 5-28 RT

Wire Connection Diagram



Part Numbering System



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