I have a carbide tipped blade for my cirular saw. It tends to bind though the
teeth seem plenty sharp enough. It has a lot of pitch reside around the blade
so I figure that the reason for the binding.
Anyone have suggestions for an easy way to remove the pitch?
As a matter of fact, I just cleaned a couple of my blades tonight using the spray
on product called Ez-Off ( or Easy-Off). It's an oven cleaner and it took the
pitch off and made the blades look like new in less than 10 minutes.
Least expensive products would be lye, trisodium phosphate (TSP), and
ammonia. (Some claim that lye products - oven cleaners fit this category
- attack and weaken the binder in the carbide. Others have said lye
won't affect modern binders. Still others say it's a non-issue.)
Commercial products are oven cleaners, general household cleaners
(Simple Green, Fantanstic), plus pitch removal products from woodworking
Owen Lowe and his Fly-by-Night Copper Company
Offering a shim for the Porter-Cable 557 type 2 fence design.
Here's the easiest, cheapest, least toxic, most environmentally benign method:
Next time you're at the grocery store, get a box of Arm & Hammer Washing Soda.
It's on the same aisle as laundry detergent, bleach, and that kind of stuff.
Should cost around US$2.50.
Fill a dishpan with warm water to a depth of about an inch, and stir in a
quarter cup of washing soda. Lay the sawblade in the dishpan for five minutes.
Pick up the dishpan and swirl the water around. Watch three-fourths of the
pitch just float away. Scrub the rest off with an old toothbrush. Rinse the
blade clean, and dry it carefully. Pour the solution down the drain.
This works for bandsaw blades, too -- just coil them first.
Doug Miller (alphageek-at-milmac-dot-com)
There is a balance between great cleaning and chemical attack of the brazing
that holds the carbide tips. I've read through the suggestions and would be
a little hesitant to use EZ-off oven cleaner or lye. The washing soda seems
relatively benign. A local supplier here swears by a product called
Charlie's soap. www.charliesoap.com, which is mild and environmentally
safe. My layman's view is that if I have to wear rubber gloves to use it,
I'd be concerned about what it might do to the saw blade integrity.
Oxi-Clean and water. Just saw it in ShopNotes #70 page 5. "To clean
router bits & saw blades, Gene Loose of Rockford, IL soaks them for a few
minutes in Oxiclean dissolved in warm water."
Have not tried it myself, have no interest in Oxi-Clean (though my wife saws
it is good stuff), it's parent companies or subsidiaries & not related to
Gene Loose. I _do_, however, subscribe to ShopNotes!
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