Maintenance on old B&D Circular Saw

[fishwatcher]

My 101 year old uncle gave me his Black and Decker circular saw model 7392. It’s a 7 - 1/4” “double insulated” saw and I know nothing else about it.

A few months ago, I used it for the first time to cut a 1 - 1/4” “butcher block” bench top to fit. It felt like it could use some lube and a new blade at the very least.

The blade I assume is dull since I burned the sides of the wood and also I didn’t make a very straight cut. You can see the little side table I made with the bench top cut-off and the burned sides here.

The saw needs some TLC and the advice in this YT video is what I’ll follow.

Any other tips, including recommendations for a replacement blade, are appreciated!

My needs for this are basic. Cut 2x4’s and basic plywood, preferably straight and without any more burn marks.

 

[RTM]

Definitely new or resharpened blade.

Definitely maintenance (did not watch video), should include clean and lube spinny buts, include cleaning the guide plate, make sure it's true to the blade. Use paraffin not beeswax to lube the plate

 

[fishwatcher]

Blade resharpening. Another thing I didn’t know about and a rabbit hole I’m going to avoid. New blade it is! Thx.

 

[RTM]

If it's a decent blade, worth resharpening, pay someone to do it. If it's a **** blade, don't bother.

 

[StillTooManyHobbies]

That appears to be a fine tooth steel blade that would usually be used on plywood. Get a general purpose carbide blade and life will get better. They are not expensive, less than $10 at Lowes. Be aware the blade bolt could left hand thread, but I am not sure.

The fine tooth blade could be cleaned with oven cleaner and might work for thin sheet goods, or it might be too dull to keep using it.

Good luck on whatever you decide to do.

 

[Skiff Builder]

In addition to the above:
Check the guard -spring Make sure it retracts and extends without binding.

Check the motor brushes- they may have screw out plugs- easy to inspect.

Make sure its unplugged while working on it!

Enjoy the saw.

 

[fishwatcher]

Check the motor brushes- they may have screw out plugs- easy to inspect.

Thx. What would I check for? [total newb here]

 

[RTM]

Longer than about 1/4 - 1/3” long, shaped to the curve at the motor, no chunks missing, good connection to the electrical side.

 

[bonneyman]

My old Skil saw had some bronze bushings on both ends of the motor. Found some at the local power tool repair place. Popped in and out with some sockets - cleaned motor brushes and it's been running like a champ for years.
Should be similar to yours. Though ereplacementparts.com has tool teardown pictures.
Here's yours:

Black and Decker 7392 2 Horse Power Circular Saw OEM Replacement Parts From eReplacementParts.com

Shop OEM replacement parts by symptoms or model diagrams for your Black and Decker 7392 2 Horse Power Circular Saw Type 1!

www.ereplacementparts.com

 

[fishwatcher]

My old Skil saw had some bronze bushings on both ends of the motor. Found some at the local power tool repair place. Popped in and out with some sockets - cleaned motor brushes and it's been running like a champ for years.
Should be similar to yours. Though ereplacementparts.com has tool teardown pictures.
Here's yours:

Black and Decker 7392 2 Horse Power Circular Saw OEM Replacement Parts From eReplacementParts.com

Shop OEM replacement parts by symptoms or model diagrams for your Black and Decker 7392 2 Horse Power Circular Saw Type 1!

www.ereplacementparts.com

Thank you! Whenever I want to learn about fixing some thing I have or want to get.. there’s always experts and info to glean from this forum.

 

[The Cobbler]

put a carbide blade on it, and you'll be surprised how it will perform. looks like the blade that came with the saw.