Applications
Where this spring style fits
Review best-fit uses, assembly constraints and situations where another spring style may be a better choice.
View application guidance →Flat Springs & Stampings
Custom Motor Brush Springs
Motor brush spring enquiries specified by brush-holder geometry and the pressure needed across the usable brush movement.
- Specification
- Drawing and working requirement
- Dimensions
- Confirmed for the assembly
- Performance
- Specified at working positions
- Quotation
- Submit dimensions and quantity
About Custom Motor Brush Springs
Motor brush springs press a carbon brush toward its contact surface as the brush moves or wears. Different spring constructions can be used, so the brush-holder arrangement must identify whether a strip-coil, helical or torsion design is intended. For a strip-coil brush spring, specify the coil location and working strip path. The useful requirement is pressure or force across the stated movement, not a generic spring size.
Key Design Characteristics
- Show brush dimensions, holder layout and the spring contact point.
- State the force required at new and worn brush positions.
- Identify whether the design is single-coil or a paired strip arrangement.
Choosing Between Related Designs
A brush spring is selected for the brush-holder interface. A twin-coil strip design has its own paired mounting requirements. Do not assume a generic helical compression spring gives the same pressure profile in the same space.
Specification and Inspection Review
Specify the installed fixture and brush positions used to check force. Define permissible movement, interference and any required endurance test for the actual holder; the spring image does not establish motor performance.
Product Specification
What to Define for This Spring
Use these product-specific inputs to describe your requirement. Final dimensions, material and performance are confirmed against the drawing and operating conditions.
| Specification item | What to define |
|---|---|
| Brush and holder | Brush size, guide geometry and contact location. |
| Spring arrangement | Construction type, coil envelope and mounting details. |
| Force positions | Required force over the usable brush travel. |
| Material section | Strip width and thickness or wire size for the selected construction. |
| Environment | Temperature, vibration, cycling and electrical-contact conditions. |
Next Design Decisions
Next Steps for Your Spring Design
Once the spring style is selected, confirm how it works in the assembly, which material suits the environment, how it will be manufactured and which dimensions and performance points should be controlled on the drawing.
Materials
Choose the material for the environment
Review strip or wire material against the required force profile, holder temperature and exposure conditions.
Compare spring materials →Manufacturing
Plan prototype and production
Review forming, heat treatment, secondary operations, inspection and the path from first samples to repeat production.
View manufacturing capabilities →Engineering Data
Use the engineering guide for design support
Use the engineering library to review materials, sizing considerations and applicable standards for the custom design.
Open Spring Engineering Guide →Material Direction
Common Material Families to Review
The links below are selection guides, not a claim that every grade is suitable for every size or load.
Compare Designs
Related Spring Products
Use these alternatives when the available space, connection style, travel or force direction changes.
Flat Springs & Stampings
Twin Motor Brush Springs
Twin-coil strip brush spring layouts defined by both coil locations, the connecting strip and the required brush-contact force.
Flat Springs & Stampings
Constant Force Springs
Custom Constant Force Springs manufactured to your drawing, dimensions, load or torque, material, working environment and production requirements.
Flat Springs & Stampings
Battery Coil Contact Springs
Custom Battery Coil Contact Springs manufactured to your drawing, dimensions, load or torque, material, working environment and production requirements.
Product Questions
Motor Brush Springs FAQ
Does every brush spring provide constant force?
No. Force behaviour depends on the construction and operating range. State the allowed force range over the brush movement.
Which brush positions should be included?
Include the required new and worn brush positions, plus any intermediate position important to the holder or contact performance.
RFQ
Send the Working Requirement
A drawing is ideal. If you do not have one yet, provide the dimensions, load or torque, travel, environment and expected quantity that matter in the assembly.
CustomSprings Engineering Catalog
Request This Spring
Send your dimensions, quantity and drawing for engineering review.