Re: Jig saw and sabre saw db200
Jewelers saws are available in hard back wide versions that are 2 or 3 mm wide. They have a reasonable stiffness. Like a small hacksaw blade and designed with plain ends for clamped attachment. ??
There are many different types.?
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On May 1, 2023, at 2:34 PM, Mehmood Naqshbandi <mehmood.naqshbandi@...> wrote:
? Yes, a hand driven piercing saw (UK) aka jeweller’s saw (USA) will serve most fine sheet metalworking needs. ?The blades are not a substitute for unimat jigsaw blades, they are far too thin. ?(And 144 blades in a pack will probably be fully accounted for in just a few days’ work in the hand frame so isn’t a bulk bargain, more like business as usual.)
The unimat jigsaw naturally has to cut on the downstroke, pressing the work against the table, and the eccentric therefore cuts by ?pulling from below. ?That’s fine. ?But the upstroke is equally energetic and the upper end of the blade is not secured to anything. ? It is held in place only by the vertical slot in the guide rod. ?So the jigsaw blade has to be rigid enough to resist buckling against the resistance of the workpiece and horizontal pressure from the operator. ?That is all fairly obvious when you look at the setup, but it means that fine piercing saw blades will just disintegrate if you try to use them in the Unimat jigsaw. ?I’m sure there are other alternatives to the Stanley blades I use in it, but they are thick enough to work reliably.
Meanwhile, fine sheet metal work is best done with a handheld piercing saw.
Regards? Mehmood? On 1 May 2023, at 15:05, Tool247 <Sjkochan@...> wrote:
? Look up on Amazon “German style jewelers saw”. They are available for around $13 for a saw frame and 144 blades. ?
I am sure that true made in Germany blades would be a higher quality. ?That said I have used both inexpensive and German or Swiss made blades. The difference in quality was difficult to quantify (a little smoother, lasted a little longer) and prices were like $10 a package of 20 or 30 versus around $20-30 a package. Micromark and Lee Valley have good quality ones. Amazon has all types and qualities.?
The Unimat saw frame appears to be a clamp type design for plain end jewelers blades.?
Before laying out a few hundred dollars for the Unimat attachment, get a saw frame and some blades to see if they work for you in a hand saw frame. If yes then the saw frame attachment will work for your needs.?
I would start on one of those sites and look for “metal cutting” description. Those blades are useful and work better than you might think, even by hand.? On Apr 29, 2023, at 8:58 PM, David James via groups.io <davebjames@...> wrote:
?Morning all,
Does anyone use their jig and sabre saw attachment on their unimat if so;
1. Is it functional or just a novelty??
2. Are blades available? I presume the normal jigsaw blades will work for the sabre saw but the thin blades look very different and most likely unavailable.
Some thought from owners and users would be much appreciated
Dave
|
Re: Jig saw and sabre saw db200
I have the round cast iron table, return arm and drive cam for the 1070 scroll saw attachment but I a am missing the table support and drive parts,maybe someday I'll find the parts to make it complete.
I presume standard 5" scroll saw blades can be used on the Unimat DB/SL scroll saw. I have used them to cut wood, plastic and non ferrous metal on my full sized scroll saw.
You must not run the saw so fast that the spring tension does not have time to pull the blade up on the return stroke, the blade must remain under tension at all times or it will flex and break.
Let the saw do the cutting, do not apply too feed much pressure on the blade, too much pressure can cause the blade to flex and cut in an arc giving poor results on thicker material not to mention overheating the blade causing premature dulling and/or breakage.
A bit of a primer on choosing scroll saw blades can be found here:
Richard B.
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Re: Jig saw and sabre saw db200
Yes, a hand driven piercing saw (UK) aka jeweller’s saw (USA) will serve most fine sheet metalworking needs. ?The blades are not a substitute for unimat jigsaw blades, they are far too thin. ?(And 144 blades in a pack will probably be fully accounted for in just a few days’ work in the hand frame so isn’t a bulk bargain, more like business as usual.)
The unimat jigsaw naturally has to cut on the downstroke, pressing the work against the table, and the eccentric therefore cuts by ?pulling from below. ?That’s fine. ?But the upstroke is equally energetic and the upper end of the blade is not secured to anything. ? It is held in place only by the vertical slot in the guide rod. ?So the jigsaw blade has to be rigid enough to resist buckling against the resistance of the workpiece and horizontal pressure from the operator. ?That is all fairly obvious when you look at the setup, but it means that fine piercing saw blades will just disintegrate if you try to use them in the Unimat jigsaw. ?I’m sure there are other alternatives to the Stanley blades I use in it, but they are thick enough to work reliably.
Meanwhile, fine sheet metal work is best done with a handheld piercing saw.
Regards?
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On 1 May 2023, at 15:05, Tool247 <Sjkochan@...> wrote:
? Look up on Amazon “German style jewelers saw”. They are available for around $13 for a saw frame and 144 blades. ?
I am sure that true made in Germany blades would be a higher quality. ?That said I have used both inexpensive and German or Swiss made blades. The difference in quality was difficult to quantify (a little smoother, lasted a little longer) and prices were like $10 a package of 20 or 30 versus around $20-30 a package. Micromark and Lee Valley have good quality ones. Amazon has all types and qualities.?
The Unimat saw frame appears to be a clamp type design for plain end jewelers blades.?
Before laying out a few hundred dollars for the Unimat attachment, get a saw frame and some blades to see if they work for you in a hand saw frame. If yes then the saw frame attachment will work for your needs.?
I would start on one of those sites and look for “metal cutting” description. Those blades are useful and work better than you might think, even by hand.? On Apr 29, 2023, at 8:58 PM, David James via groups.io <davebjames@...> wrote:
?Morning all,
Does anyone use their jig and sabre saw attachment on their unimat if so;
1. Is it functional or just a novelty??
2. Are blades available? I presume the normal jigsaw blades will work for the sabre saw but the thin blades look very different and most likely unavailable.
Some thought from owners and users would be much appreciated
Dave
|
Re: Jig saw and sabre saw db200
Hi Dave,
I'm in the camp of a dedicated saw would be better. Small enough to store under a bench. Mainly, I'm too impatient when it comes to reconfiguring tools, would rather just have the separate tool, which is why I have a 2nd Unimat that will be setup as a mill. The other reason is that I don't want to cut wood or do any grinding that would get sawdust/grit on the lead screws/ways.
Steve
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Hello, Dave!
It would not be worth the cost to me.
--
forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
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Re: Jig saw and sabre saw db200
Look up on Amazon “German style jewelers saw”. They are available for around $13 for a saw frame and 144 blades. ?
I am sure that true made in Germany blades would be a higher quality. ?That said I have used both inexpensive and German or Swiss made blades. The difference in quality was difficult to quantify (a little smoother, lasted a little longer) and prices were like $10 a package of 20 or 30 versus around $20-30 a package. Micromark and Lee Valley have good quality ones. Amazon has all types and qualities.?
The Unimat saw frame appears to be a clamp type design for plain end jewelers blades.?
Before laying out a few hundred dollars for the Unimat attachment, get a saw frame and some blades to see if they work for you in a hand saw frame. If yes then the saw frame attachment will work for your needs.?
I would start on one of those sites and look for “metal cutting” description. Those blades are useful and work better than you might think, even by hand.?
toggle quoted message
Show quoted text
On Apr 29, 2023, at 8:58 PM, David James via groups.io <davebjames@...> wrote:
?Morning all,
Does anyone use their jig and sabre saw attachment on their unimat if so;
1. Is it functional or just a novelty??
2. Are blades available? I presume the normal jigsaw blades will work for the sabre saw but the thin blades look very different and most likely unavailable.
Some thought from owners and users would be much appreciated
Dave
|
Wow, that was a lot of money in 1964! ?I started work in 1967 and my gross weekly pay was 3 pounds 10 shillings as a trainee aircraft fitter, so more than 8 weeks pay!?
This is my first post to this group, I have two Emco’s, a Unimat 3 and a Compact 5. I also have a Myford ML10. I started with the Myford, then got the Unimat, and then a couple of weeks ago the Compact 5 became available and I couldn’t resist it. ?The compact 5 is capable of doing the work of both the Unimat and the Myford so I’ll probably sell them to fund some other toys. I’d rather keep the Myford but space is a problem. :(
Cheers from Tasmania
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Hi,
Here's an advert? from the June 1964 Railway Modeller for the unimat as being sold by Beatties of London...
best wishes
Richard
<Scan_20230429 _3_.jpg>
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Re: Needle Bearing and washers for Unimat?
On Mon, May 1, 2023 at 02:40 AM, OldToolmaker wrote:
234981173764
OK, I see it now. You would only need these if you were running without the standard motor bracket. With the motor bracket in place the cup locating the end of the spring would not touch the pulley, and so the spring wold not spin. A better answer overall would be to?make a collar to clamp on where the motor bracket was. Something formed from a bit of aluminium strip would be enough.
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Re: Needle Bearing and washers for Unimat?
-- 234981173764
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
|
Re: Needle Bearing and washers for Unimat?
On Sun, Apr 30, 2023 at 01:11 PM, OldToolmaker wrote:
I saw a needle bearing and washer stack available on EBay for the Unimat headstock.
Item number please!
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Hi Ron,
IIRC I paid ?45 for my SL second hand in the mid 70s - still going strong but now with a 24v motor....
By the way we were in Tasmania last November (both my sister-in-law and brother-in-law live in the Hobart area) and will probably be over again in either November or December this year
best regards
Richard
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Re: Jig saw and sabre saw db200
Hi
Gang:
One of
the advantages of the Unimat saws is speed control. I can slow
my Unimat table saw down to where it doesn't melt plastic and
still have the torque to cut.
I don't
have the scroll saw, but I think slower speeds would help
there too.
On 4/30/2023 8:11 AM, David James via
groups.io wrote:
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Thanks for the feedback, I don't have a saw but was wondering if
it was worth it to buy one. Sounds like it is more hassle than
fun.
Dave
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These are the Unimat's I have at the moment.
It happens that they represent most of the models from the MK1 to the zamak model.
They are all pictured from the same angle and same light to show the difference.
There are more coming in this album!
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Ruben <groen.drenthe@...> added the album
Emco Unimat models side by side
: Photo's of different models Unimat and accessories side by side in studio setting.
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Re: Jig saw and sabre saw db200
Hello, Dave!
It would not be worth the cost to me.
--
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?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
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Re: Needle Bearing and washers for Unimat?
I don’t see any reason for the thrust bearings in that application. ?(That is not a needle bearing). The head space assembly is precisely machined to pre-load the magneto bearings on the business end of the headstock. ?Seems to me these will mess with that preload.?
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Re: Jig saw and sabre saw db200
Of course it depends on how severe your particular case of techno lust is. ? A real stand alone machine is almost always preferable but space and cost can preclude that. They do work, but with limits that have been well spelled out in previous responses. Based on that information think out what your particular needs and budget are and proceed accordingly.?
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On Apr 30, 2023, at 9:32 AM, David James via groups.io <davebjames@...> wrote:
?Thanks for the feedback.? My question to all is, is it worth buying one to use or not?
Dave
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Re: Jig saw and sabre saw db200
Thanks for the feedback.? My question to all is, is it worth buying one to use or not?
Dave
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Re: Jig saw and sabre saw db200
I have owned both at one time. The older cast iron version for the DB200 has a spring blade tension and the newer version for the SL uses a solid blade guide slot and may be easier to use.
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
|
Needle Bearing and washers for Unimat?
I saw a needle bearing and washer stack available on EBay for the Unimat headstock. Has anyone installed this system on their Unimat? If so does it work well? There is also a disclaimer in the ad about using the Uni in lathe mode. Does anyone here have first hand experience with this item?
Dick
--
http://www.homemadetools.net/forum/?OFF-SET-tailstock-center-65965#post105972
?SMALL TURRET TOOL POST PLANS?
?LARGE TURRET TOOL POST PLANS
?MINI-LATHE CARRIAGE LOCK PLANS
?SMALL QC TOOL POST PLANS?
?QUICK CHANGE LATHE TURRET
?MINI LATHE COMPOUND PIVOT MODIFICATION
|
Re: Jig saw and sabre saw db200
Thanks for the feedback, I don't have a saw but was wondering if it was worth it to buy one. Sounds like it is more hassle than fun.
Dave
|
Tool247
Steve Johnson
OldToolmaker
Carl
Ruben
Tom Angell
David James