[TheForge] slitting chisel / drift

[Rich Maynard]

What is the relative position of the pickets and the wave? If the length of
each section of wave is related to the pitch of the pickets you could get
away with making less tooling.

For example if the wavelength (!) is 12" all the pickets would be on the
crests/troughs of the waves. If it is 24" or 36" you would need a set of
tooling to punch on the flat and on one specific angle which could be
inverted/reversed to do all the intermediate holes. For 48" or 60" you'd
need to work with flat and two different angles.

Just a thought.

Richard Maynard - Artist Blacksmith
The Forge, Much Hadham, Hertfordshire SG10 6BS
 
rich at muchhadhamforge.co.uk
www.muchhadhamforge.co.uk


-----Original Message-----
From: theforge-bounces at mailman.qth.net
[mailto:theforge-bounces at mailman.qth.net] On Behalf Of Dave Mudge
Sent: 22 January 2008 08:36
To: theforge mailist
Subject: [TheForge] slitting chisel / drift


Friends, I need a little advice on two issues.
1. Although my new shop is not up and running yet I have a temporary set-up
in the machine shop where I work. Air hammer, gas forge, anvil, swage blocks
etc. We have a job coming up where I will need to slit & drift 1/2" square
holes in 3/4" x 1-1/2" flat bar on 6" centers. I have no identifiable tool
steel (other than automotive coil springs) from which to make the slitting
chisels and drifts. Can someone give me the process for hardening &
tempering forging tools made from automotive type coil spring?

2. This is a railing. Imagine the afore mentioned 3/4" x 1-1/2" flat bar as
a wave running the length of a section of railing. The 1/2" square pickets
will pierce the wave on 6" centers. The holes to be slit & drifted to size
will have to be on an angle that would be on tangent with the straight
pickets and the curves of the wave. Piercing the bar on the flat would be
one thing, but piercing it on an angle is quite another. Any advice on how
to do this would be appreciated. thanks, dave mudge Bogalusa, Louisiana
dave at magichammer.net _______________________________________________
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