Tiny linear servomotor is piezo application replacement

Nippon Pulse America's Linear Shaft Motor, which is 4 mm in diameter, is reportedly designed to be a replacement in piezo-type applications.


Nippon Pulse America introduced its smallest linear servomotor, the 4 mm Linear Shaft Motor. The 4mm shaft diameter, a small forcer size (10 mm x 10 mm), a total weight of 9 grams, and strokes as long as 40 mm make the 4 mm Linear Shaft Motor a suitable replacement in piezo-type applications. 

The 4 mm Linear Shaft Motor is reportedly quiet due to the absence of friction since the only mechanical contact section is the linear guide. The coreless construction of the Linear Shaft Motor totally eliminates cogging.

The Linear Shaft Motor's high motor stiffness allows it to be used in high precision positioning applications where a resolution of 0.09 nanometers is achievable. With the Linear Shaft Motor, you will find that you have virtually no fluctuation in speed.

Durable construction makes it possible to operate the Linear Shaft Motor in harsh conditions, including a vacuum situation and underwater.

Compared to other linear motors on the market, the Linear Shaft Motor is compact and lightweight. Due to its design, the Linear Shaft Motor has no backlash.

Specifications for S040D Linear Shaft Motor:

  • Continuous stall thrust - 0.5 N
  • Continuous stall current - 0.4 A
  • Peak thrust 2 N
  • Peak current - 1.8 A
  • Shaft diameter (D) 4 mm (0.16 in.)
  • Slider length (A) 25 mm (0.9 in.)
  • Slider width (B) 10 mm (0.39in.)
  • Mounting pitch (P x P1) 21.5 x 4 mm
  • Mounting screw (M x l) 4-M2
  • Gap 0.5mm (0.02 in.)
  • Slider weight 0.01 kg/F
  • Available stroke 20, 30 & 40 mm
  • Magnetic pitch (N-S) 9 mm (0.354 in.) (N-S)


Nippon Pulse America

- Edited by Chris Vavra, Control Engineering, www.controleng.com

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