FJsapper
Cast Iron
- Joined
- Nov 18, 2020
- Location
- Sterling Heights, MI
Got some really good info here from several different threads so i thought i would compile what i learned and applied to produce my hand scraper.
I recently made myself a carbide hand scraper in order to work through a lathe rebuild i am working on.
https://www.practicalmachinist.com/...d-metalmaster-384378-post3660895/#post3660895
Anyways i pretty quickly realized hand scrapers are expensive to purchase and may not be as well suited to individual needs from the factory based on individual height/arm length etc. I am a tall dude at 6'3" so i decided to roll my own.
The last post of this thread by Richard King sealed the deal for me. Synopsis: make your own scraper for like $30. https://www.practicalmachinist.com/...here-buy-hand-held-scraper-328552/index2.html
I used nothing but the most basic hand tools and a bench grinder. I purchased 36" of 3/4"x1/8" 1018 steel bar stock McMaster-Carr. The handle was made from a scrap piece of walnut and a junk bronze bushing and taper pin.
Once i had the metal i used the bench grinder to roughly profile a .35" circular cutout 1/16" through the thickness of the 1/8" bar. A hand file was used to square the cut off.
Then i cut a nub off the end to use as the top cap for the scraper.
3/4"x3/4" square carbide blanks were purchased off of ebay for 25x @ roughl7 $28 shipped. Far cheaper than you can find new.
These were then profiled and sharpened on the diamond sharpening plates i got off of amazon. 1x @ 400 grit and 1x @ 1000 grit. I have a 3000 grit on the way but for my current needs that is good enough.
On the grinder i made myself a rest on each side @ 5deg out of 2x4 lumber i had laying around. Please keep in mind i used an extremely ancient and secret method to obtain the requisite 5deg angle. On the 1/8" blades i put two bevels on each side each at 5deg.
Holes were drilled and the two pieces were assembled to sandwich the carbide. I tapped 10x32 holes and used 1/4" hex screws.
And from there i was able to shred paint and metal as needed. Total cost was less than $35 and 2 hours time.
This is totally within the capability of the shop that has no access to a drill press, mill, lathe, or pretty much anything else you could imagine as necessary for precision work.
Thanks everyone for the great threads that allowed me to figure all this out. Hopefully consolidating this in one place is helpful to someone else.
I recently made myself a carbide hand scraper in order to work through a lathe rebuild i am working on.
https://www.practicalmachinist.com/...d-metalmaster-384378-post3660895/#post3660895
Anyways i pretty quickly realized hand scrapers are expensive to purchase and may not be as well suited to individual needs from the factory based on individual height/arm length etc. I am a tall dude at 6'3" so i decided to roll my own.
The last post of this thread by Richard King sealed the deal for me. Synopsis: make your own scraper for like $30. https://www.practicalmachinist.com/...here-buy-hand-held-scraper-328552/index2.html
I used nothing but the most basic hand tools and a bench grinder. I purchased 36" of 3/4"x1/8" 1018 steel bar stock McMaster-Carr. The handle was made from a scrap piece of walnut and a junk bronze bushing and taper pin.
Once i had the metal i used the bench grinder to roughly profile a .35" circular cutout 1/16" through the thickness of the 1/8" bar. A hand file was used to square the cut off.
Then i cut a nub off the end to use as the top cap for the scraper.
3/4"x3/4" square carbide blanks were purchased off of ebay for 25x @ roughl7 $28 shipped. Far cheaper than you can find new.
These were then profiled and sharpened on the diamond sharpening plates i got off of amazon. 1x @ 400 grit and 1x @ 1000 grit. I have a 3000 grit on the way but for my current needs that is good enough.
On the grinder i made myself a rest on each side @ 5deg out of 2x4 lumber i had laying around. Please keep in mind i used an extremely ancient and secret method to obtain the requisite 5deg angle. On the 1/8" blades i put two bevels on each side each at 5deg.
Holes were drilled and the two pieces were assembled to sandwich the carbide. I tapped 10x32 holes and used 1/4" hex screws.
And from there i was able to shred paint and metal as needed. Total cost was less than $35 and 2 hours time.
This is totally within the capability of the shop that has no access to a drill press, mill, lathe, or pretty much anything else you could imagine as necessary for precision work.
Thanks everyone for the great threads that allowed me to figure all this out. Hopefully consolidating this in one place is helpful to someone else.