circular-sawwoodworking
I would like to replace the rear bearing from a Dewalt DWS520 Type 1. I am not getting the armature removed. I did remove the yellow cover, but the armature is still stuck in the body of the saw. Can someone tell me how to remove the armature, so I can replace the rear bearing? Should I be able to pull him lose (tried that already, but it seems really stuck), or should I first open the gearcase on the backside and replace the gasket afterwards?
Many thanks for your answer!
Best regards,
Peter
While I can't speak to the quality of all manufacturers blades, in general the blade that comes with the saw is of no lower quality than any other blade offered by the manufacturer.
Most miter saws come with a 24 tooth FTG (Flat Top Grind) blade, which is good for fast course cuts. If you're looking to chop 2x lumber, this blade will work fine for you. If you're planning to use the saw to make fine cuts, you'll want to upgrade to a blade with more teeth and a grind that reduces tear out.
In general, the more teeth a blade has, the finer the cut it will produce. A blade with 24 teeth; for example, will remove more material with each blade than say a 40 tooth blade. because more material is removed more quickly, the quality of the cut is lower.
The grind of the blade, describes the shape of the tips of the teeth.
As the name describes, the tips of these teeth are flat, or straight across. These blades produce the courses cut, and often result in lots of chip out.
The teeth of these blades alternate between a right, and left handed bevels. If you look at the teeth, you'll see that one is beveled one way, while the next is beveled the opposite way. These blades produce a finer cut that FT blades, and result in less chip out.
These blades consist of groups of teeth, where one will be FT with the rest being ATB. Typically there will be a group or 5 teeth (1 FT, 4 ATB), where each group is separated gap (gullet). These are more general use blades, and do fairly well at both ripping (cutting along the grain) and crosscutting (cutting across the grain).
The teeth of these blades alternate between a FT tooth, and a double beveled tooth (bevel on left and right, with a flat top). They are good for cutting hard materials, so are often used to cut MDF, plastics, and laminates.
These blades have alternating beveled teeth like an ATB blade, except that the bevel angle is much greater. An ATB tooth is typically beveled at 10-20°, a HiATB tooth will be beveled at 25-40°. These blades are good for extra fine crosscutting, and reduce chip out to a minimum.
freud blades used for example purposes only, because they show the tooth configuration on the blade. I have no affinity towards freud.
In general, it is not worth taking apart tools such as a handheld circular saw or drill. There is not much in the way of user-serviceable parts, and doing so may void any warranty you have with the manufacturer.
First, I recommend looking up if there are any "consumable" parts such as fuses which are user-serviceable. This may be a quick and easy fix.
Your next step should be finding an authorized DeWalt service center that has the specialized tools, parts, and training to repair the tool. The major tool companies tend to have company-owned or authorized third-party repair centers in major metropolitan centers in the U.S. at the very least. They can inspect the tool and tell you if repair makes sense: it may cost more to repair the tool than to replace it. Being this new, however, it is likely covered by a factory warranty that will cover a significant portion of the cost.
Best Answer
I looked at an exploded view of that saw, and there are bearings listed as replacement parts (part No's 66 and 68), which is usually the tell-tale sign that they are replaceable. That may however be difficult if you don't have the right tools and skill sets, such as a bearing puller and a press to re-install them. I would call DeWalt.