Is there warranty on replacement parts you've purchased?

Section62

drsquirrel said:

Just the armature, I can't tell how the pinion is fitted but definately no c clip/key way etc, its almost as if its one peice.

Here is a photo: https://i.imgur.com/icuX29b.jpg

Looks like the teeth are just machined out of the shaft, one peice.

I'd agree it looks like it is machined/formed as part of one piece.


The fixing method question was largely irrelevant now you'd confirmed that it was supplied fitted/integrated.  It was only a potential issue if you had to tighten a nut/bolt/grub screw to fit it, or use force to achieve an interference fit.  Any of those have the potential for causing overstress that could lead to failure, but not relevant in this case.

The photo isn't clear enough to be sure, but at a guess I'd say the pinion has failed in shear due to the torque load being greater than the design capacity.  It doesn't look like there is a lot of metal there to cope with the kind of torque involved, in an environment where vibration and shock loading would be expected as well.


Unless you've done it already I would send the picture to the manufacturer and ask them to comment and their recommended solution.

drsquirrel

Section62 said:

Unless you've done it already I would send the picture to the manufacturer and ask them to comment and their recommended solution.

I've sent it to them and started to push them on this, they first came back with "sorry no warranty on parts, don't know why they told you to send this" after I had called them. So I have asked them for their expected life span of it.

It did surprise me how small it was, though unfortunately was still cheaper than replacing the unit (a better one is planned!).

Alderbank

I agree with what Section 62 says.

How long had you had the mitre saw when it first failed?

How did the original armature fail, was it the same fracture of this pinion or something else?

Did you buy the replacement armature from the original manufacturer/retailer or a third party? What did it cost?

I see you have had the replacement for 7 months. If the supplier says after seeing the photographs that the failure was caused by incorrect fitting or excessive load, under consumer law the onus would now be on you to prove otherwise

drsquirrel

3-5 years on the mitre saw.

Similar failure to the first time.

Replacement from their official website. £55 + postage.

Can't really prove anything unfortunately, other than it was working fine, I would expect any problems with fitting to be immediately apparent. Can't exactly half fit it.

I'll keep pressuring them for a while and just hope it goes my way.

Section62

drsquirrel said:

I've sent it to them and started to push them on this, they first came back with "sorry no warranty on parts, don't know why they told you to send this" after I had called them. So I have asked them for their expected life span of it.

I think there is a reasonable case that failure is not a warranty matter, but instead a question of whether it is fit for purpose.

Does the company have a UK base or head office?

Find out where, then locate the local council trading standards department for that area and give them a call.  Ask if they are the lead authority for issues with that manufacturer (or if not, who is).

Ask if they are aware of other reports of failures with that model of saw - describe what happened in terms of the replacement part failing in the same/similar way.


Trading standards operate on a 'home authority' basis with many manufacturers and suppliers - reports and issues get routed to that authority to deal with, rather than the one where the complainant lives.  The home authority usually has a reasonable working relationship with the company and the right contacts.  A casual enquiry by you to the home authority may filter back to the right person at the company to give you a more satisfactory resolution.

If not, consider making a formal complaint to your local council's TS department, after letting the manufacturer know that is what you intend to do.