Electric bicycles
Magnets and motor components for e-bikes
EMTXI sources custom neodymium magnets and related motor components for electric-bicycle programmes. For hub motors and mid-drive assemblies, we compare production routes against the buyer's component drawings, qualification requirements and purchasing schedule. Sourcing can begin with samples or an existing part requiring another route.
Identify the motor arrangement
Hub and mid-drive motors are not interchangeable component specifications. Supply the motor arrangement and the drawing for the item being sourced, including any surfaces that locate the part in the assembly. For a ring magnet or segment set, define magnetisation and polarity on the drawing rather than relying on the motor's commercial description.
If the enquiry covers multiple models, distinguish common parts from variant-specific items. Document the drawing revisions approved for each model. This helps keep sample evaluation, quotations and later deliveries attached to the correct configuration.
Describe the environment and acceptance tests
Share the temperature conditions and duty cycle used for material selection. Identify exposure to moisture, cleaning agents or other substances that the assembled design must address. A coating should be selected together with the assembly protection and any bonding process; it is not a substitute for testing the completed design.
Specify whether dimensions apply before or after coating. Where corrosion or durability testing is part of acceptance, provide the required method and pass criteria. We request a route-specific response and identify any tests that need to be performed by your team or an agreed laboratory.
Qualify components before programme releases
An enquiry may start with loose magnets, then expand to stators, shafts, housings or rotor assemblies through motor component kits. We separate supplied components from any requested assembly work. Sample quantities, inspection records and customer sign-off are defined before recurring deliveries are discussed.
For volume programmes, distinguish forecast demand from confirmed releases. Include model changes, seasonal delivery requirements and the plan for service parts. These details affect the route assessment and commercial proposal; availability is confirmed for the specific order.
Prepare the sourcing brief
Part drawing, revision and intended motor arrangement
Magnetic properties, direction and delivery condition
Coating, assembly interfaces and environmental requirements
Sample quantities and approval tests
Programme forecast, batch sizes and delivery destinations
Lot identification, document retention and change-notification requirements
If origin restrictions apply, describe the evidence required at each stage of the chain. The origin-traceability guide explains why a final assembly location does not by itself establish the origin of the magnet material. We identify evidence gaps before representing a route as accepted.
Buyer questions
Do you supply a standard replacement for every e-bike motor?
No universal replacement is offered. We quote a defined component against your drawing and specification. Fit, magnetic behaviour and assembly compatibility must be qualified for the intended motor.
Can you coordinate several parts for a motor platform?
Yes. Magnets, stators, shafts, housings and rotor assemblies can be assessed as a combined sourcing enquiry. Each part needs its own specification, inspection scope and approval status.
Does component approval establish compliance of the bicycle?
No. Component records support the bicycle or drive-system manufacturer's assessment. Acceptance of the complete product, its applicable requirements and its intended use remains a separate responsibility.
EMTXI · Reviewed
Your next step
Share the magnet or motor-part drawing and the requirements for your next qualification batch.