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  6. All-metal ultra-compact planetary gear reducer

All-metal ultra-compact planetary gear reducer

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SDP Series

last updated:Sep 03, 2025

信電舎 東京本社
信電舎 東京本社
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Ultra-compact! A full metal planetary gear reducer lineup starting from size φ5.

The "SDP series" is a full metal miniature planetary gear reducer that uses ultra-precision gears with module sizes ranging from 0.08 to 0.5, with an outer diameter of φ5 to φ31. It features a small volume, lightweight design, and a large reduction ratio, achieved through the low-cost mass production of internal gears using ultra-precision metal processing technology, resulting in the completion of full metal ultra-miniature planetary gear reducers with diameters of φ5 and φ6. ○ SDP5H: Outer diameter 5mm, total length 9.8 to 19.8mm, reduction ratio 1/4 to 1/1024, maximum instantaneous torque 10 to 40mNm, rated torque 5 to 20mNm. ○ SDP6H: Outer diameter 6mm, total length 10.6 to 21mm, reduction ratio 1/3.7 to 1/699, maximum instantaneous torque 20 to 60mNm, rated torque 10 to 40mNm. There is also a series combined with high-torque motors of φ5 and φ6, so please inquire for more information.

    Power Transmission Equipment
SDP.jpg

All-metal ultra-compact planetary gear reducer

SDP.jpg
SDP.jpg
  • Related Link - https://shindensha.co.jp/

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basic information

The "SDP series" is a full metal miniature planetary gear reducer that uses ultra-precision gears with module sizes ranging from 0.08 to 0.5, with outer diameters from φ5 to φ31. It features a small volume, lightweight design, and a large reduction ratio, achieved through the low-cost mass production of internal gears using ultra-precision metal processing technology, resulting in the completion of full metal ultra-small planetary gear reducers with diameters of φ5 and φ6. ○ SDP5H: Outer diameter 5mm, total length 9.8 to 19.8mm, reduction ratio 1/4 to 1/1024, maximum instantaneous torque 10 to 40mNm, rated torque 5 to 20mNm. ○ SDP6H: Outer diameter 6mm, total length 10.6 to 21mm, reduction ratio 1/3.7 to 1/699, maximum instantaneous torque 20 to 60mNm, rated torque 10 to 40mNm. There is also a series combined with high torque motors of φ5 and φ6, so please inquire for more information.

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Applications/Examples of results

Robot joints, electric hinges, and various other applications are available for your use.

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Company Profile of Shindensha Co., Ltd.

Company Profile of Shindensha Co., Ltd.

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Company information

信電舎

信電舎 東京本社

Manufacturing and processing contract

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Company Name: Shindensha Co., Ltd. Established: 1965 (Showa 40) Capital: 22.5 million yen Head Office Location: 〒133-0056 Tokyo, Edogawa-ku, Minami-Koiwa 8-6-7 TEL: 03-3658-8251 FAX: 03-3658-8254 Nagano Factory: 〒387-0021 Nagano Prefecture, Chikuma City, Inariyama 994 E-mail: eigyoubu@shindensha.co.jp Representative: Takayuki Miyazaki 【Business Description】 Development, design, and manufacturing of small reduction gears Precision metal parts processing 【Products Handled】 1. Spur reduction gears 2. Planetary reduction gears 3. Semi-custom reduction gears: Customization based on standard reduction gears 1.2 4. Full custom reduction gears: Newly designed reduction gears tailored to customer requests 5. Precision gears (compatible from module 0.08) 6. Precision metal processed parts

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