Festool Owners Group

FESTOOL DISCUSSIONS => Festool Tool Problems => Topic started by: kevkrieg on April 11, 2019, 08:06 PM

Title: DF500 breaking cutters
Post by: kevkrieg on April 11, 2019, 08:06 PM
I have a DF500 and everything was working fine, then earlier this week I broke a 5 mm cutter on some white oak.  I bought another one and within 15 cuts it broke the tip too.  Festool is standing behind the cutters, so that is good, but then today I was using it again with a 10 mm CMT cutter and it broke the tip off too in popular, so very soft wood.  I'm plunging it slow and smooth.  After the 10 mm broke I noticed a small screw on my workbench that looks like this...  Any ideas on the issue?  Thanks. [/img]
Title: Re: DF500 breaking cutters
Post by: Cheese on April 11, 2019, 08:37 PM
There have been previous threads on the FOG about breaking #4 & #5 cutters. Try a search.

Personally, I've never had an issue with either size and I've used them hundreds of times in maple, oak, 2x material and even Brazilian mahogany which has a Janka hardness in the 2500 range. I think that is roughly twice the hardness of hard maple.

I just put in 160 mortices today with a Festool #6 cutter in BB ply without an issue.
Title: Re: DF500 breaking cutters
Post by: Vondawg on April 12, 2019, 08:27 AM
The obvious question....you’re not plunging too hard/fast  are you ?
Title: Re: DF500 breaking cutters
Post by: Birdhunter on April 12, 2019, 02:40 PM
I looked closely at my 500 and did not see anything that looked like your mystery screw. If it came from inside your 500 it might explain the breaking bits.

I’ve cut hundreds of mortises with my 500 and I can remember breaking 1 4mm bit and 1 5mm bit. I mostly use very hard exotic woods.

Entering the wood gently and progressing smoothly makes the bits last longer. I use my body and not my arms to move the 500. It’s the same feel as using a hand plane.
Title: Re: DF500 breaking cutters
Post by: jobsworth on April 13, 2019, 10:33 AM
Ive had my 500 for a few years now and have not broken a bit.

 The first thing that comes to mind is incorrect technique, plunging rate, holding the 500 square to the material, aybe fence adjustment etc etc.

Could also be the OP just got a bad one. Sometimes that happens to.
Title: Re: DF500 breaking cutters
Post by: MueMi on April 27, 2019, 03:04 AM

could it be probably part no. 20?