Thread: Dewalt 700 Radial Arm Saw - blade change issues

Lower the arm down until it bites into the bench, place a block against the teeth and then loosen nut.
Alternatively, clamp 2 blocks of wood either side of the blade while they sit on the bench then loosen nut.
Try some penetrating oil first and let soak for 15min before trying to loosen the nut.
I assume the nut is threaded in the same direction as the blade rotation.
Then there is the no no of how to loosen a stubborn nut, using a ring spanner, give the spanner a good hit with a mallet, this usually works as a last resort.

Nut is a left-thread. Needs to turn same direction as blade to remove.

I had tried the biting into bench, blocks of wood either side, and also a screwdriver in the tooth gullet to stop rotation, without luck. What's been happening is the blade itself stays stationary, but the shaft spins on the collet/bushing. I've had no issues keeping the blade from moving . i guess you'd say the blade is slipping on the motor shaft, making undoing the nut more difficult.

In the end I freed it up - had to temporarily prevent the motor from rotating in its case to get some torque on the nut. Freed it up.

Cheers for the thoughts!

I am not familiar with a 700 RAS but have a 740, similar to 1250, 770, 790 and other later model (dual badged DeWalt/B&D) units. Look at the saw arbour and you may well find that the end of the arbour has a hex head socket formed in it. I have original tool kit for my saw, and as well as the arbour nut spanner, it includes a long (approx 200mm) Allen key which fits in the socket. You can then work spanner and key to release or tighten the nut. From memory, I think it is 6mm, ut could measure it in daylight if it helps you obtain a suitable key.

My DeWalt/Tatry DW125 has the same set up as Malb has described.

Hope it helps as the pix is from my manual which goes a little further with regards a stuck nut.


DW125 2013-06-09 at 3.50.15 PM.png

I have the DeWalt 720 and it takes the combination Allen key and spanner. Otherwise there is an incredibly helpful guy at Stanley/Dewalt, Martin ten Broek who seems to have an interest in RASs may be able to assist?

Hi All,
Apologies first of all for asking a question not relevant to this thread. I have picked one for AU $ 40 from country Victoria today and going to check it out tomorrow morning if it is going to work or not. Please be kind enough to share any valuable tips, instructions and specially if any one of you have a working/user manual.
Thanks In Advance
Dhan