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Old 11-20-2019, 02:40 AM
Sean Jones Sean Jones is offline
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Worn jack blades

When I made my jacks I used mild steel for the blades. I wasnít sure there was any point in using carbon steel and hardening them as they were going to get hot in service which could re soften them.
Now I have a little experience I can see that they need to be ware resistant. Is it worth using manganese steel (if I can find it) or is mid/high carbon best. From the colour of my used pair Iíd guess it is worth hardening them as they donít appear to get hot enough to draw there temper and loose there hardness.
I know I shouldnít be grinding them on cold neck lines, Iím getting better at that.
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Old 11-20-2019, 12:10 PM
Eben Horton Eben Horton is online now
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This is just my opinion but you shouldnít judge a jack by its durability but by its workability. You want a set of blades that heat up quickly and hold wax.
Ivan Smith made his blades out of medium carbon Sheffield spring steel. He personally told me this.

If you blow glass properly you should not wear out your blades in your life time. The worst habit (and I have seen many English blowers do this) is to grab the punty rod with your jack blades to apply the punty to the bottom of your piece. This will wear your jacks out in a year of doing this on a regular basis.

If you make blades that are built to be durable the working properties of the steel on the glass may be less than favorable.
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Old 11-20-2019, 12:53 PM
Shawn Everette Shawn Everette is offline
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If your jacks are getting hard enough to lose temper, you're doing it wrong. Medium steel should be fine, but Jim uses high and Jeff uses spring. Just remember to be nicer to your jacks that the other tools, your tweezers don't care what you do to them.
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Old 11-20-2019, 02:26 PM
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Pete VanderLaan Pete VanderLaan is offline
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My best pair of jacks was made for me by Shorty Finley out of a leaf Spring on an old chevy. Those sadly vanished but they were light and held wax well.
I had a job at one point about 20 years back doing 800 weights and heavy vases for Washington Mutual. The weights were large and involved a hard jacking down off the punty. I wore a groove in the Moores and replaced them with Cutting Edge which have not worn at all. Of all of them, I really miss the one's Shorty made but a lot of that is probably sentimental.
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Old 11-20-2019, 03:05 PM
Shawn Everette Shawn Everette is offline
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Jeff's materials and workmanship are top notch, but the ergo's always a little off for me. The angle the handles are set just seem too funky for me to want to get used to. If I had those demascus shears I might change my mind.

The Moore's have always fit my hand better, but they can get beat up easy. I have to fix shop sets every semester, but my personal set is working on 10+ years.

I won't bother to talk about essemce.
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Old 11-20-2019, 04:40 PM
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My first duck bills came from Essemce. Henry Summa wound up with them but they were wonderful compared to the stuff from Putsch, Jeff's duck bills continue to serve me well.
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Old 11-20-2019, 07:50 PM
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David Patchen David Patchen is offline
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There's a new glassblowing supply store opening in the UK called The Glass Toolbox; you can find them if you google. I'd recommend you see what commercially made jacks they carry and get a pair. The issue of jack blade material has been worked out (with varying degrees of success) and I bet any decent commercially-made jacks (Maruko, Jasen Johnsen, Carlo Dona, Jim Moore, Cutting Edge) are going to be better than what you make. That is unless you enjoy spending more time metalworking and less time glassblowing. Work hot and they won't wear much at all.
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Old 11-20-2019, 07:56 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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Essemce jacks were the Volvos of jacks for me, after working in Japan I got the best from a Japaneese guy, absolutly beutiful, Ive never worn out any jacks in 29 years, and wheve run production
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Old 11-20-2019, 11:29 PM
Nick Delmatto Nick Delmatto is offline
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Quote:
Originally Posted by Pete VanderLaan View Post
My first duck bills came from Essemce. Henry Summa wound up with them but they were wonderful compared to the stuff from Putsch, Jeff's duck bills continue to serve me well.
A lot of first names thrown around.....who's Jeff?
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Old 11-21-2019, 07:55 AM
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Jeff Lindsay- Red Hot Metal, also known as Cutting edge.
Henry Summa.- first apprentice deceased
Shorty Findley- Gaffer at Blenko. Quite the character.
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Old 11-21-2019, 08:34 AM
Shawn Everette Shawn Everette is offline
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Essemce aren't volvo, I loved my s80. I'd say maybe saab. They worked, but needed improvement, and you only really see them in shops as curios.
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Old 11-21-2019, 08:35 AM
Shawn Everette Shawn Everette is offline
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I really hope Jim doesn't need to be explained.
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Old 11-21-2019, 01:21 PM
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Quote:
Originally Posted by Shawn Everette View Post
I really hope Jim doesn't need to be explained.
****
You'd be surprised. Jim Moore, a fine toolmaker.
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Old 11-22-2019, 04:15 AM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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As in common, utilitarian, workhorse, students cant ruin them. Agree room for improvements
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Old 11-22-2019, 10:03 AM
Kenny Pieper Kenny Pieper is offline
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Check these out. They were Walter Evens
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File Type: jpg walters jacks.jpg (35.0 KB, 102 views)
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Old 11-22-2019, 05:53 PM
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Scott Dunahee Scott Dunahee is offline
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That is awesome.

Awesome.

BSD
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Old 05-28-2020, 02:39 AM
Sean Jones Sean Jones is offline
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I made a new pair of jacks with D6 blades, a ware resistant high chrome steel. Hardened the blades and tempered them to about 60 HRC (very hard and possibly a bit brittle).
The difference is remarkable. These have a much smoother feel. Especially as you squeeze down on a cooling neck line. You donít get that grinding feeling when youíve run out of heat. As yet, no dirty jack lines as Iím not leaving any steel behind.
I imagine they are going to last a long time.
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Old 05-28-2020, 08:23 AM
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Don't work your glass too cold and they will.
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Old 06-01-2020, 12:31 AM
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One of the most outstanding glass tools Iíve seen were Ed skeels diamond shears. D8 steel, double beveled and polished on the back of the blade so the only thing that really touched the glass was one point in the center of th3 V. And the v was more open than the cutting edge big shears by quite a bit and you could cut much bigger glass.
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Old 06-01-2020, 06:26 PM
Eric Trulson Eric Trulson is online now
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Quote:
Originally Posted by Jon Myers View Post
One of the most outstanding glass tools Iíve seen were Ed skeels diamond shears. D8 steel, double beveled and polished on the back of the blade so the only thing that really touched the glass was one point in the center of th3 V. And the v was more open than the cutting edge big shears by quite a bit and you could cut much bigger glass.
Man, I miss Ed. Went looking for one of his videos on youtube the other day, but his "Keith Orr" account and all the videos are all totally gone. Good toolmakers are thin on the ground, I wish he were still around.

(Incidentally, if anyone has a locally stored copy of that video showing the robot arm spinning out an enormous rondel, please let me know. That clip is just too good to let it get lost in the sands of time)
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Old 06-01-2020, 06:48 PM
Eben Horton Eben Horton is online now
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I miss Ed too. I mean... who else has cremated a cat in their gloryhole ?
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Old 06-01-2020, 07:53 PM
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Ed is on the road with his truck. I hear from time to time. Truly a troubled soul.
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Old 06-02-2020, 03:57 AM
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Quote:
Originally Posted by Eric Trulson View Post
Man, I miss Ed. Went looking for one of his videos on youtube the other day, but his "Keith Orr" account and all the videos are all totally gone. Good toolmakers are thin on the ground, I wish he were still around.

(Incidentally, if anyone has a locally stored copy of that video showing the robot arm spinning out an enormous rondel, please let me know. That clip is just too good to let it get lost in the sands of time)
You can find all his videos in the Wayback machine under the old keith Orr website.
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Old 06-02-2020, 09:09 AM
Eben Horton Eben Horton is online now
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Back to the jack blades.
Shin @ Maruko tools just started making blades out of chrome vandium steel.
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Old 06-02-2020, 05:23 PM
Larry Cazes Larry Cazes is offline
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Quote:
Originally Posted by Eben Horton View Post
Back to the jack blades.
Shin @ Maruko tools just started making blades out of chrome vandium steel.
been using their tweezers for a long time. My favorites
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