Wantage Tramway Jane No. 5 in 4mm

B

Bigjohn

Western Thunderer
Simond
Not sure of the exact science or logic, I would never rotate a reamer but only use uni directional. I have never understood the use of jobbers drills in an Archimedean type holder. A spade type drill is appropriate. Perhaps it goes back to only using a file or hacksaw in the correct pull/push mode. It just seems illogical logic if that makes sense!!!!!!!!!
 
michael080

michael080

Western Thunderer
Simon,

a slippery slope, this is not my native language, so broaching and reaming may need a closer definiton.

https://shop.machinemfg.com/drilling-boring-broaching-and-reaming-key-differences-explained/

is quite informative.

My understanding is that a broach is used to push a specially shaped hole into an existing (round) hole.

https://cdn.hoffmann-group.com/derivatives/203065/jpg_600/jpg_600_b290406.jpg

A reamer is a tool that rotates like a drill bit. It is used to finish a hole to a certain diameter with a certain surface quality.

https://cdn.hoffmann-group.com/derivatives/45512/jpg_600/jpg_600_g160100_a.jpg

Referring to my earlier post, I should have written "I learned that a reamer must never be turned backwards."
 
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