Custom Brushed Motor Commutators | OEM/ODM Manufacturer in China
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- ISO 9001 quality system
- Surface finish (typical): Ra 0.9–2.0 μm
- Runout control (typical): TIR ≤0.05 mm
- Batch checks: roughness & roundness
- Electrical tests: bar-to-bar resistance, insulation resistance, hi-pot
What Makes an XDC Commutator Different?
Stable commutation depends on the brush–commutator–armature system, not a single part. We help you reduce arcing, improve brush wear uniformity, and increase reliability by controlling the manufacturing details that drive real-world performance.
- Controlled surface finish and geometry to support stable film formation
- Bar height consistency to reduce uneven brush contact and localized heating
- Practical guidance on brush grade, holder geometry, and spring pressure compatibility
Brushed Motor Commutators by XDC
Our product range covers cylindrical and flat commutators in multiple diameters and segment counts, suitable for micro to medium DC motors. Copper segments with molded insulation and hook or riser designs support stable current transfer and reliable coil termination. Options fit applications such as power tools, household appliances, automotive components, and small precision devices. Designs can be adapted to match specific rotor dimensions, performance requirements, and assembly methods.
95.4mm 57-Segment Motor Commutator
Segmented copper commutator for DC machines; 95.4 mm outer diameter and 57 bars provide stable current transfer, good balance, and reliable performance in medium-size motors and generators.
15.2mm 10-Segment Hook Commutator
Compact copper hook-type commutator with 15.2 mm outer diameter and 10 segments, suitable for small DC motors requiring reliable current transfer and easy coil connection.
370 Motor Cylindrical Copper Commutator
Molded plastic hub with copper segments, designed for 370-size DC motors, providing stable commutation in compact power tools, toys, and automotive applications.
15mm 10-Segment Hook Commutator
Compact hook-type copper commutator, 15 mm outer diameter with 10 segments, for small DC motors requiring stable current transfer and convenient coil connection.
47.6mm 16-Segment Hook Commutator
Flat copper hook-type commutator with 47.6 mm outer diameter and 16 segments, suitable for medium DC motors requiring reliable commutation and convenient coil termination.
23.2mm 12-Segment Hook Commutator
Disc-type hook commutator, 23.2 mm outer diameter with 12 segments and molded insulation, suited for compact DC motors needing stable commutation and straightforward coil termination.
7.6mm 3-Segment Hook Commutator
Miniature copper hook-type commutator, 7.6 mm outer diameter with 3 segments, for micro DC motors needing stable current transfer in limited space.
6.5mm 6-Segment Hook Commutator
Ultra-compact copper hook commutator, 6.5 mm outer diameter with 6 segments, suitable for micro DC motors requiring precise commutation in space-constrained designs.
Machining Standards (Surface Finish & Geometry)
Surface finish control
Typical finishing targets Ra 0.9–2.0 μm for most industrial and traction commutators to support rapid formation of a stable carbon film without excessive friction. Extremely smooth surfaces (below ~0.4 μm) or overly rough surfaces (above ~2 μm) are avoided because both can accelerate abnormal wear and increase sparking.
Geometric precision (ovality & runout)
Production controls commutator TIR ≤0.05 mm with strict internal limits on bar-to-bar height variation to reduce uneven brush wear and flashover risk.
Why Choose Us – XDC, China’s Premier Commutator Manufacturer
When you choose XDC, you’re choosing a partner that understands both theory and real-world constraints.
Engineering support you can use
We support OEM and maintenance teams—from replacement compatibility to design improvements—using practical commutation analysis and FMEA thinking to prevent common failure modes (pitting, grooving, abnormal wear, flashover).
Precision manufacturing & verification
• CNC machining and dedicated commutator lathes for cylindricity and balance
• Surface roughness and roundness checked on every batch (not only first-off)
• Electrical tests: bar-to-bar resistance, insulation resistance, and high-potential tests
Materials built for service life
• Copper alloys and mica insulation selected for thermal stability
• Compatibility guidance for common brush families (electrographitic, resin-bonded, metal-graphite)
• System-level recommendations so commutator and brushes work together
Applications
Whether you’re replacing a worn dc motor commutator segment or developing a new platform for an OEM product, XDC can match dimensions, performance and life expectations—or improve them. XDC supplies custom and standard commutators for:
Industrial DC motors
rolling mills, extruders, cranes, winches, hoists
Traction motors
locomotives, mining haul trucks, rail vehicles
Universal motors & power tools
vacuum cleaners, appliances, high-speed tools
Starter motors & automotive DC motors
starters, blowers, auxiliary drives
Hobby/RC & gear motors
small PMDC motors and precision gearmotors
Contact Us
Ready to upgrade reliability, reduce downtime and optimize your brushed motor commutator design?
Get in touch with XDC, China’s premier commutator manufacturer:
- Share your motor commutator drawings.
- Please provide us with additional information about this product, such as materials, quantity, etc.
- Request a quotation for prototypes, small batches or large-scale production.
Contact us today to discuss how XDC can support your next DC motor, traction system or power tool platform with precision-engineered commutator solutions.
WhatApps
+86 17820674273
FAQ – Brushed Motor Commutator Basics
Small, intermittent sparks can be normal in many brushed DC motors. Continuous bright arcing, ring fires, or sparking that increases with load/speed often indicates issues such as brush grade mismatch, spring pressure, contamination, surface finish problems, or excessive runout. We help you keep sparking within safe, predictable limits through commutator specification and brush compatibility guidance.
Typical finishing targets Ra 0.9–2.0 μm for most industrial and traction commutators, with tighter ranges available for small high-speed units. This supports stable film formation, fast run-in, and low wear.
Yes. With dimensions, drawings, or samples, we can produce compatible replacements and often improve geometry control or surface finish. For fleet maintenance, we can propose upgrades aimed at reducing pitting, grooving, and flashover risks.
We supply commutators for humid climates, dusty operations, and heavy-duty traction equipment. For hazardous locations, we coordinate on brush selection and commutator requirements to support your protection concept and local regulations.
Yes. NDA is available on request, and files are handled confidentially for engineering review and quotation.
PDF, DWG, STEP, IGS, X_T, SolidWorks, or ZIP. If you only have photos and key dimensions, send those—we can start from there.
Related Resource
At XDC, we share our deep insights into commutators, manufacturing processes, and industry experience on our blog. We invite you to explore these articles to learn more about our expertise.
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