scraping as in scrapers

[dirtydeeds]

being a carpenter im not big on fine finishing but would like to understand more

i have a rough understanding about how a scraper works, you put a hook (burr) on a scraper and it is the burr which does the work

why do you bend the scraper

some tools like a veritas hand scraper allow you to bend the blade to suit the use

which way are you bending the blade convex or concave





next question

ive used stanley knife blades (no hook) and no bend (that im aware of) to remove unwanted glue

ive also used chisels (no hook and no bend) to clean the bottom of rebates and housing joints

why do these blades / tools work in what i guess is a similar fashion to a scraper. they dont have a burr to do any cutting

[engineerone]

in principle you are doing different things are n't you

removing glue or whatever is an object on top of the wood.
the scraper actually removes the wood.

when i first used a scraper many years ago in woodworking, i renovated an oak dining table, and did not know that you had to put a hook on the scraper. the real pain of course was the heat build up, and needing to change the angle of attack.

so these days i use a veritas scraper plane, and one of their holders for flat scrapers.

if you think about it, a chisel or plane, are breaking the surface
whereas the scraper seems to slice along the top of it.

i am sure there is a more technical description, but that is what i see. even after sanding, the wood has hollows and bumps, and the scraper tends to smooth those out more evenly because it cuts through and across the grain. which is i guess why they work on odd grains.

paul

who now cannot decide whether this is more confusing or less ;D

[dirtydeeds]

oh dear.................. im confused

[paulchapman]

Hi DD,

If you PM me your address, I have a few articles on scrapers and scraping that you might find helpful. Happy to photocopy and send them to you.

Cheers

Paul