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  6. Hollow Motor [Large Diameter, Brushless Motor]

Hollow Motor [Large Diameter, Brushless Motor]

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last updated:Dec 01, 2025

NIPPON PISTON RING CO., LTD.
NIPPON PISTON RING CO., LTD.
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Achieving high torque and space-saving! For joint drives in collaborative robots!

Our company's developed hollow motor is an axial gap type motor that uses a powdered core. We provide a motor with high torque and minimal mechanical losses due to its gearless design. Its large diameter hollow structure allows for the passage of cables and air tubes, making it suitable for joint drive applications in collaborative robots. 【Features】 - Axial structure, high torque and compactness due to powdered core - Reduction of mechanical losses and gear noise through gearless design - Storage and space-saving capabilities due to the hollow section Please feel free to contact us.

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大口径中空アキシャルギャップモータrs.jpg

Hollow Motor [Large Diameter, Brushless Motor]

大口径中空アキシャルギャップモータrs.jpg
大口径中空アキシャルギャップモータrs.jpg
  • Related Link - https://www.npr.co.jp/newbusiness/index.html#paget…
  • Special site - Product/service details - https://pr.mono.ipros.com/npr/product/

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basic information

【Specifications】  Motor Type: Brushless Axial Gap Motor  Structure: Single Gap Structure (1 Rotor, 1 Stator)  Dimensions: Outer Diameter 65mm (Hollow Diameter 30mm) × Height 43mm (excluding shaft)  Weight: 370g  Input: 24V  Output: Torque 0.35Nm @ 2700rpm @ 4.6Adc @ 100W (rated),     Maximum Speed 3,000rpm

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Applications/Examples of results

【Usage Example】 For collaborative robot joint drive, etc. Please feel free to contact us.

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Introduction materials for the powder compact core axial gap motor.

Introduction materials for the powder compact core axial gap motor.

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Company information

NIPPON

NIPPON PISTON RING CO., LTD.

Machine elements and parts

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Our group is engaged in the manufacturing and sales of automotive-related products (piston rings, valve seats, and other automotive-related products) as well as marine and other products, along with related businesses. Our products are adopted in various types of engines, backed by reliable technology and a rich lineup of quality. In addition to automotive and marine products, we also handle MIM (Metal Injection Molding) parts that can achieve small and complex shapes, axial gap motors optimal for AGVs, motor cores (powdered magnetic cores), highly biocompatible titanium alloys (NiFreeT), and medical device components (dental implants).

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