Ferrite Arc Magnets for Fan & Blower Motors
Project Starting Point: Drawing
Project Overview
ProfurtherMag supplies ferrite arc magnets to a manufacturer of automotive axial fans and blowers in India. The customer provides magnet drawings, and samples are produced for the customer's assembly confirmation before bulk purchasing. The cooperation began in 2018 and continues today.
One axial fan motor project required an adjustment to the magnet end chamfer. During assembly, the customer found that one end of the magnet could not fully reach its seating position at the edge of the plastic clip holder, so the U-shaped retaining clip could not engage securely. The chamfer needed to be increased to suit the interface between the magnet end and the plastic holder.
| Customer | Automotive fan and blower manufacturer in India |
|---|---|
| Supplied Product | Ferrite arc magnets |
| End Applications | Automotive axial fan and blower motors |
| Starting Point | Customer drawings |
| Featured Assembly Issue | Magnet end not reaching its seating position at the plastic clip holder, where the U-shaped retaining clip has to engage |
| Design Adjustment | Increased end chamfer so the magnet end reaches the seating position at the plastic holder edge for secure U-shaped clip engagement |
| Approval Route | Samples checked in the customer's assembly before bulk purchasing |
| Cooperation | Since 2018 |
1. The Engineering Challenge
Customer ProblemWith the initial end geometry, one end of a magnet could not fully reach that intended seating position. This prevented secure engagement of the clip and raised a concern about inadequate retention and the magnet coming loose during operation.
The requirement was therefore not simply to supply the arc profile shown on a drawing. The magnet end also had to clear the surrounding assembly features and seat correctly at the interface with the plastic holder.
2. Technical Assessment & Root Cause Analysis
InvestigationThe focus of this adjustment was mechanical fit between the magnet end, the plastic clip holder and the U-shaped clip. It was specific to the axial fan assembly and should not be treated as a general chamfer requirement for all fan or blower magnets.
3. Actions Executed by ProfurtherMag
Execution2. Used the customer's assembly feedback to identify the magnet-end fit at the plastic clip holder and the U-shaped retaining clip.
3. Increased the end chamfer so the magnet end could reach the intended seating position at the edge of the plastic holder.
4. Followed the customer's sample-confirmation process before supplying bulk orders.
4. Project Outcome & Serial Results
Recorded ResultProfurtherMag has continued working with this customer since 2018, supplying ferrite arc magnets for both automotive axial fan and blower motor applications. The assembly adjustment described here concerns the axial fan project; the blower supply is a separate part of the same customer relationship.
Practical Takeaway
For magnet assemblies retained by U-shaped clips working with plastic clip holders, the magnet end geometry and chamfer need to be considered together with the retaining parts. A sample check in the customer's actual assembly can identify fit issues that an isolated magnet drawing does not fully explain.
Supporting Documents
Evidence
A — the magnet end as first supplied: it could not reach the intended seating position at the edge of the plastic clip holder, so the U-shaped clip could not engage securely. B — the same end after the chamfer was increased to reach that seating position, allowing the U-shaped clip to engage.
Related Records
This project record is filed against the pages below. Each one opens its own record, where the material, application or route is described in full.
This project is also listed under For Component Manufacturers & Assembly Suppliers on the Applications page, where component manufacturers and assembly suppliers can start from a magnet drawing or a sample.
Need Ferrite Arc Magnets for a Fan or Blower Motor?
Send your magnet drawing or sample and any available assembly information. Where clips or other retaining features are used, include the mating interfaces and the fit requirements so they can be considered during the sample review.