My KS12-1 circular saw blade slips on the spindle. how can I fix this?
Welcome to the Bunnings Workshop community @gencomm. It's brilliant to have you join us, and many thanks for your question about circular saws.With the flange installed correctly, the nut tightened sufficiently and using a circular saw blade with a bore size of 20mm, your blade should not slip. If this is the blade included with the saw, I'd recommend you double-check that the nut flag is installed correctly; it might be flipped the wrong way around. If it is installed correctly, I suggest returning the saw for assessment from our team in-store.Please let me know if you have any questions.Mitchell
Thanks for the reply Mitchell,
can you send me a picture of exactly How the blade is installed on the saw?
Hello @gencomm
Below is the brochure for the AEG KS12-1. There is an illustration on the start of page three how the bolt and washers are arranged for installation.
Here is the link for the brochure: AEG Instructions
If you need further assistance, please let us know.
Eric
ll
Hello Eric thanks for the instruction drawings.
I am happy that every thing is done correctly.
The blade has been allowed to slip. now it will not tighten. all the spacers are in place. is this a problem experienced by others?
I think there is enough of a recess to the flange collar (for want of a better term), unless there is end float in the spindle shaft.
The threaded socket for the retaining screw is "blind". I fitted the extra spacing washers to make sure the screw wasn't bottoming out.
I just had a thought though, maybe the spring washer thingy got too hot and lost its spring/grip?
what do you think? It is still possible to turn the blade by hand with the spindle locked!
I'm going to ask you to stop right there and make no further adjustments. Please do not operate the saw under any circumstances. I suggest bringing your tool to the store and speaking to the senior tool specialist in the tool department. I recommend showing them your circular saw and letting them see what's been happening in regards to blade installation. I propose asking them to show you the display of the AEG KS12-1 and looking at the blade installation sequence. If anything is amiss you should be able to see it with the display set at the store.
I have already done that. the tool specialist was polite but unenthusiastic. there was nothing to show me anyway. as packets were sealed and the appliances mounted and locked to displays. there were no spares to buy
I was not powering the machine up, but looking at the tolerances.
these seem to me to be ok....Except, as I said, the spring washer my have been overheated.
Are you able to provide me with a part number and were I can purchase one from?
Hi @gencomm,
In the blade installation section, I note that the flange washer is shown with the tapered edges facing outward and the flat portion against the blade. In your images above, it appears that the tapered edges are towards the blade, with the flat surface facing out. If this is the case, please remove it and attach it facing the other direction.
Please let me know if you have any questions.
Mitchell
Hi @MitchellMc
When you look at the magnified image on Bunnings - the outer flange doesn't appear to be beveled/tapered?
I'm wondering if the end thread of the locking bolt has been stripped?
Any likelihood of this @gencomm ?
Cheers.
Hi @Noyade,
I double-checked with the AEG technical team, and they confirmed that the flat side of the external flange goes against the blade and not the tapered side. I mentioned your observation, and they are now looking into the image as they believe the flange is pictured in the incorrect position.
@gencomm,
If switching the flanges side so the flat side is against the blade does not work, AEG have advised that they would like to take a look at the saw for you to determine the issue. It could be a manufacturing fault and if so they will replace parts. Please take the unit to your closest Bunnings store with your proof of purchase and they will initiate a warranty repair.
Afternoon @gencomm and @MitchellMc
"they are now looking into the image as they believe the flange is pictured in the incorrect position."
It will be very interesting to see what AEG come back with. I had a look at French and Russian YouTubes with the KS12-1 and they definitely show a wide outer flange with a very obvious taper as seen in the schematic on the first page.
But Googling (eBay - Cashies - Cash converters) in Australia - I keep seeing that flange @gencomm has - flat, coin like with no taper.
Continent based changes perhaps?
I think what looks like taper on @gencomm's photo is shadow?
All French to me. 😁
Hello Eric,
Sorry I am having a little difficulty in working out who is who... but I'll get there.
ps in spite of the photos looking like it is ready to go, the saw has not been operated. I am aware of the issues that may be caused by high RPM, balance and the blade remaining integrated.
I think the problem might be solved replacing the bushes and spring washer
Are you able to provide me with part numbers and were I can purchase one from?
regards,
John
Hello Noyade,
I visited the Bunning's store to speak to someone. the tool specialist was polite but unenthusiastic. there was nothing to show me anyway. as packets were sealed and the appliances mounted and locked to displays. there were no spares to buy
In spite of the photos looking like it is ready to go, the saw has not been operated. I am aware of the issues that may be caused by high RPM, balance and the blade remaining integrated.
Your unit has a warranty, and if the blade is not functioning, it would be best to submit the product to the Tool Shop team member for repair. We wouldn't be looking for them to assist you in diagnosing the issue; they simply take the product, a copy of your proof of purchase and details so they can send your saw to AEG to be repaired.
If you can let me know the store you'll be attending, then I can phone ahead to let me know you'll be in to drop off the tool.
You can order spare parts at your local store's Special Orders desk, but I don't believe there is an issue with the flanges or spring washer. Heat wouldn't have deformed the spring washer, and even if it had, it wouldn't prevent the blade from being clamped in position.
I'll run out to a Bunnings store today to take some pictures for you. I'm almost certain that either the inner or outer flange is in the wrong position or direction. I've dealt with dozens of slipping circular saw blades or blades that spin up and then stop when they touch timber. In all those instances, it was due to the flanges not being installed correctly.
G'day Mitchell@MitchellMc and John @gencomm
"I'll run out to a Bunnings store today to take some pictures for you."
That would be great. 👍
I do think John has the outer flange in the correct position based on his photo seen above.
And no taper.
I feel my eyes can discern the machined out circular area - that you see on the backs of other circular saw outer flanges...
"In spite of the photos looking like it is ready to go, the saw has not been operated"
This is the bit I don't understand John. On the previous page, your blade looks well worn? A different blade maybe? And why then do you believe the spring washer has therefore "overheated?"
It has a spindle lock? With the lock engaged and the nut tightened - the blade freewheels without the spindle/nut/flange moving?
Is it a secondhand saw?
I look forward to @MitchellMc's investigation and findings! 😁
Back from the store, no real mysteries were solved. Can I get you to check whether the rear flange is in place and orientated correctly as per the image below?
Apart from that, it doesn't look like it particularly matters which way the front flange is orientated.
Silly question, but are you engaging the blade lock button/lever whilst tightening the blade? It's the black lever directly above the bolt behind the blade guard. It depresses and locks the drive spindle in place so you can tighten the blade bolt sufficiently.
If we can't solve the issue here, it's best to submit the saw for a warranty repair.
Fascinating and frustrating.
Reading the manual on Bunnings, it indicates an arbor of 20mm for the KS12-1.
Below is not an AEG saw, but it is a 20mm arbor. If you flip the inner flange you create at least one new impossible situation. A new 'arbor' size is created of 28mm - hence the blade will no longer fit. Plus of course, it no longer makes contact with the drive system.
I can only imagine the same for the AEG.
If I may be John's advocate - he must have the inner flange correctly installed - otherwise we wouldn't be seeing this on the previous page...
Tis all very odd.
To qualify @Noyade, I don't believe he has the inner flange on the wrong way. I just like to work through all possibilities before we resort to sending the unit away for assessment.
Agreed.
I love puzzles like this - bearing in mind safety.
Don't let me get in the way!
Another thought - bushes were mentioned on Page 1. The blade appears to have the markings of AEG, but.....what is the arbor?
Hi @Noyade
I've placed a link to the AEG instructions for the KS12-1. The specifications for the saw are located on page 14.
Here is the link to the AEG circular saw: AEG Original Instructions
