Dewalt TS Not Scutting @90

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Forum topic by Divotdog posted 02-01-2015 04:26 AM 845 views 0 times favorited 3 replies Add to Favorites Watch
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68 posts in 3618 days

02-01-2015 04:26 AM

I have a Dewalt DW744X (or type 4) ts and it will not cut miters, etc. as it used to. Its about 4 years old and has started cutting unevenly. For example a miter about 3 1/2” wide will be almost 1/16 out of square. I have an Incra miter guage and it is still tight so I know that’s not the problem. Lining the guage up with the blade @90 while the blade is at 0 does no good.

The blade to miter track edge measurement is about 1/32 different from the back to front of the blade. But I am seeing bigger variations in the cuts. I spoke with a fairly savvy guy from Rockler and he said that once the blade is at a cant it will cut all over the place. He also says this cant can be caused by slamming the trundle into the 45 or 0 degree position, instead of easing it up or down and that some sort of adjustment to the trundle is needed.

Sorry for all the rambling but my point is I have no idea what adjustment he is talking about. I cleaned my blades, the arbor, the shaft and the retaining piece. My manual makes no reference to this area and so far not finding much on line.

Anyone have any ideas? The saw has performed great, cutting compound miters and small inlays, etc.

-- David, Dallas,Tx - golf weather is warming up but it's cool in the shop.

3 replies so far

View crank49's profile


4032 posts in 3147 days

#1 posted 02-01-2015 03:59 PM

Perhaps he meant Trunnion instead of trundle. I never heard of a trundle except in reference to a bed.
My guess is, since the blade is mounted on the motor on that saw that your arbor bearing may be shot and allowing movement of the blade out of plane.
But, that is just a guess.

View Divotdog's profile


68 posts in 3618 days

#2 posted 02-01-2015 04:50 PM

Thanks, crank49 for the reply.
My apologies for the trunnion error – and I suppose cutting does not have an “S”!

Does anyone know how I could test or see that this bearing is bad. Does it make certain noises when it’s going out ?

-- David, Dallas,Tx - golf weather is warming up but it's cool in the shop.

View johnstoneb's profile


3036 posts in 2348 days

#3 posted 02-01-2015 04:57 PM

Take a look at this site.
That saw doesnt have a trunnion per se but a support bracket that hold the motor and blade assembly. The table bolt to the base on the four corners of the base. I would check the table and try to square it up to the blade and make sure the motor/ blade support bracket is tight. There is a bearing that could be considered a trunnion brg but it looks quite large in the breakdown. That is probably the last place I would look. I think you will find the table or motor support has loosened and shifted.

Remember a 1/32 difference on each side of a miter will add up to 1/16”.

The bearing will generally have some movement that you can feel side to side and in and out. Look for the simple stuff first that saw isn’t that old and shouldn’t have bearing problems.

-- Bruce, Boise, ID

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