Flat Top Dado Saw Blade ?

**Sam** · 8th September 2018, 10:47 PM

I'm considering a 6mm flat top dado saw blade to install on my Dewalt DW745 'job site' saw for finger joints. Measured the arbor at 20mm long and then put a 6mm spacer + the 'washer' (proper name unknown) and the nut on, which ends up equal with the end of the arbor. Do I need some thread to spare to use this type of blade safely ?
The blade body looks thinner than the teeth so perhaps I'd have a little more to spare with the actual blade installed.
blade.PNG

This is the blade https://www.timbecon.com.au/septembe...dado-saw-blade

Thanks in advance,
Sam

**Midnight Man** · 9th September 2018, 12:26 AM

I'll say at the outset that I can only look online at specifications, as I don't have this model of saw myself.

But I seemed to remember discussion of dado stacks with this saw, so I looked it up.

If you have this saw: Home - Products - Powertools - Machinery - Table Saws - 254mm Lightweight Table Saw - DEWALT

Then the user manual for it should be this one (?): http://service.dewalt.co.uk//PDMSDoc...45-typ4_xe.pdf

If I'm on the right track so far, then you should very carefully read page 15 - the saw is intended for use with 250mm (10 inch) blades (the one you link to is 8 inch). It also mentions that it isn't designed to use with a dado stack - I know you want to use a single blade of the stack - I'm not sure how safe/possible that would be, so personally, I'd be avoiding it myself.

**aldav** · 9th September 2018, 08:34 AM

I can't foresee any problems with you using this blade. You're talking about an extra 3mm of blade body thickness, it will be of no consequence. A single blade IS NOT a dado stack.

**orraloon** · 9th September 2018, 11:46 AM

I agree with aldav. Its just a thicker kerf blade. Provided the holding nut can be fully threaded on I can't see a problem. You will likely need to make a zero clearance insert plate however.
I may get one of those myself as I find that I would hardly ever use the entire width of my dado stack and all that messing with spacers can be a chore
Regards
John

**ian** · 9th September 2018, 03:26 PM

If it's for cutting box joints, perhaps you should consider one of these Forrest Finger Joint Set - Lee Valley Tools
or one of these Saw Blades | Dado Sets | Box Joint Cutter Set

more expensive that Timbercon's offering, but perhaps more versatile

**Sam** · 10th September 2018, 09:46 PM

Thank you for the replies.

**Mobyturns** · 11th September 2018, 07:14 AM

One thing to always be mindful of - wide kerf blades demand more power and torque from the motor!

That is the main reason for the development of thin kerf blades for cordless power saws - they require less power so enhance battery life. No tradie really wants to save 1mm of MGP10 per cut!

**orraloon** · 12th September 2018, 12:26 AM

Feed rate to suit the cut and besides it is unlikely you would do really deep cuts with it either.
Regards
John

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