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 Twin Motor Brush Springs
Twin-coil strip brush spring layouts defined by both coil locations, the connecting strip and the required brush-contact force.
- Specification
- Drawing and working requirement
- Dimensions
- Confirmed for the assembly
- Performance
- Specified at working positions
- Quotation
- Submit dimensions and quantity
About Custom Twin Motor Brush Springs
Twin motor brush springs use a paired coil arrangement in the specified brush-holder design. Twin describes the spring construction; it does not automatically mean two separate brushes or equal force on two contacts. Show both coil locations, the connecting strip and the actual brush contact. The assembly drawing is needed to explain how the strip is supported and moves as the brush position changes.
Key Design Characteristics
- Identify both coil locations and the connecting strip path.
- Show the brush contact region and holder clearances.
- State total contact force and any per-contact requirement separately.
Choosing Between Related Designs
Compare a single-coil brush spring when the holder has a different mounting envelope. Twin-coil strip springs should also be distinguished from double torsion springs, whose legs and torque-angle requirements form a different specification.
Specification and Inspection Review
Use a fixture that reproduces both coil supports and the brush contact. Define force acceptance across the intended travel and any required checks for strip clearance, movement or endurance.
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 |
|---|---|
| Paired geometry | Coil diameters, widths, centre spacing and connecting-strip layout. |
| Brush interface | Brush dimensions, contact surface and holder arrangement. |
| Working movement | New and worn positions and permitted strip travel. |
| Force requirement | Required brush force and allowable variation over movement. |
| Strip and environment | Thickness, width, material and holder temperature. |
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 spring-strip grade, condition and edges for the coil arrangement, force profile and brush-holder environment.
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
Motor Brush Springs
Motor brush spring enquiries specified by brush-holder geometry and the pressure needed across the usable brush movement.
Flat Springs & Stampings
Constant Force Springs
Custom Constant Force Springs manufactured to your drawing, dimensions, load or torque, material, working environment and production requirements.
Torsion Springs
Double Torsion Springs
Custom Double Torsion Springs manufactured to your drawing, dimensions, load or torque, material, working environment and production requirements.
Product Questions
Twin Motor Brush Springs FAQ
Does twin mean two brushes?
Not necessarily. It identifies the paired coil arrangement. The holder drawing must show how many brushes or contact regions the spring actually loads.
Can I specify just one coil diameter?
Provide both coil positions and dimensions, the connecting strip and the holder envelope. The complete arrangement determines fit and movement.
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.