SPG
About
About SPG
SPG manufactures standard and custom geared motors, gearheads and precision reducers through Korean production operations. Its established portfolio serves factory automation, appliances, mobility equipment and other electromechanical systems that require compact speed reduction and torque transmission.
For robotics, SPG supplies precision reducer technology used inside joint and drive assemblies rather than complete robots. The KAIROS programme provides a concrete platform qualification: SPG reducers were integrated into standard humanoid drive modules at the waist, hips and ankles, following joint actuator-development work with the Korea Institute of Machinery and Materials.
Articles
Supply
Supply chain relationships
- SeAH Besteel
Inbound - materials and robotics supply chain - SeAH Besteel supplies special steel for SPG robot-reducer flexsplines, following initial deliveries in February 2026
Source - Korea Institute of Machinery and Materials
Outbound - actuation and motion control - SPG reducers power the waist, hips and ankles of KIMM's KAIROS research humanoid
Source
Team
- Yeo Young-gil - Chief Executive Officer - Leads SPG’s geared-motor and precision-reducer business, including SH and SR reducer supply for collaborative and industrial robots.
Timeline
Events
- 2026-10-06 - Production Milestone - SPG's flexspline-steel supplier SeAH Besteel enters mass production
The alloy is designed for flexsplines, which transmit motor power inside precision reducers. Alloy design and vacuum-degassing processes target heat-treatment deformation and non-metallic inclusions that can initiate fatigue cracks. SeAH Besteel plans to expand the range with additional special-steel grades tailored for humanoid robots.
Source - 2026-09-08 - Capability - SPG reducers integrated into KAIROS humanoid standard drive modules
The reducers are used in KAIROS drive modules at the waist, hips and ankles. The hardware outcome follows an actuator-development agreement signed with KIMM in October 2025. KIMM is targeting KAIROS V1 for April 2027; the disclosure does not establish commercial-volume reducer shipments.
Source
Context
Comparable profiles
- Zhongda Leader
comparable profile - Motor Reducer Supplier · Precision Reducer Supplier
- Nidec
comparable profile - Motor Reducer Supplier · Precision Reducer Supplier
- Harmonic AD, Inc.
comparable profile - Motor Reducer Supplier · Precision Reducer Supplier
- Proception AI
comparable profile - Humanoid Component Supply
- Meili Technology
comparable profile - Humanoid Component Supply
- Yansyn / 演犀科技
comparable profile - Humanoid Component Supply
Shared workflows
- Ti5 Robot
workflow adjacency - Humanoid Joint Module Supply
- Tuopu Group
workflow adjacency - Humanoid Joint Module Supply
Context tags
- Humanoid component supply - Peer Group - https://view.asiae.co.kr/en/article/2026090809421492220 — exact reviewed source supports this bounded company context.
- Precision reducer supplier - Peer Group - https://www.spg.co.kr/ — exact reviewed source supports this bounded company context.
- Robot joint supply chain - Customer Environment - https://view.asiae.co.kr/en/article/2026090809421492220 — exact reviewed source supports this bounded company context.
- Humanoid joint module supply - Workflow - https://view.asiae.co.kr/en/article/2026090809421492220 — exact reviewed source supports this bounded company context.
- Motor and reducer supplier - Peer Group - https://www.spg.co.kr/ — exact reviewed source supports this bounded company context.