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Search: Posts Made By: Gerald D
Forum: 40. Z-Slide Sat 30 June 2012, 08:12
Replies: 120
Views: 154,515
Posted By Gerald D
The plate is rather thin and may strip when the...

The plate is rather thin and may strip when the bolts are tightened
Forum: 40. Z-Slide Sat 30 June 2012, 00:26
Replies: 120
Views: 154,515
Posted By Gerald D
From memory, the extra 5mm will touch the bent...

From memory, the extra 5mm will touch the bent stop of the spider plate. You can increase the height of the pedestals under the bearing rollers to move the slide further from the spider.
Forum: 40. Z-Slide Wed 25 January 2012, 09:15
Replies: 120
Views: 154,515
Posted By Gerald D
I would also move the z-slide along a fence and...

I would also move the z-slide along a fence and leave the grinder static.
Forum: 40. Z-Slide Sun 07 February 2010, 11:23
Replies: 120
Views: 154,515
Posted By Gerald D
That table saw could not tilt.

That table saw could not tilt.
Forum: 40. Z-Slide Wed 01 April 2009, 13:01
Replies: 120
Views: 154,515
Posted By Gerald D
Mild Steel is about Rockwell B70 (Brinell 120) ...

Mild Steel is about Rockwell B70 (Brinell 120)
O1 Tool steel: Rockwell B90 (Brinell 185)
A2 tool steel plate : Rockwell B95 (Brinell 210)
Starrett precision ground oil hardening stock Rockwell B98...
Forum: 40. Z-Slide Fri 16 January 2009, 22:15
Replies: 120
Views: 154,515
Posted By Gerald D
The draw filing was only to "sooth" as you say...

The draw filing was only to "sooth" as you say (maybe you meant smooth). Only to remove the small tool chatter marks left by my milling guy - I didn't tell him I wanted it smooth.
Forum: 40. Z-Slide Fri 16 January 2009, 12:43
Replies: 120
Views: 154,515
Posted By Gerald D
John, he changed his mind on the machineability...

John, he changed his mind on the machineability in his next post.

I did grind a sample on a table saw - it does work. The biggest issue is to decide whether you are happy to do that to your saw...
Forum: 40. Z-Slide Fri 16 January 2009, 08:28
Replies: 120
Views: 154,515
Posted By Gerald D
Mine (tool steel/gauge plate) were bevelled on a...

Mine (tool steel/gauge plate) were bevelled on a milling machine and finished with draw filing and emery (sand) paper.
Forum: 40. Z-Slide Fri 16 January 2009, 07:44
Replies: 120
Views: 154,515
Posted By Gerald D
Not true - it mills, drills, taps beautifully....

Not true - it mills, drills, taps beautifully. Tougher than mild steel, but no problems with normal cutting tools in standard mill or drill press or hand tapping or filing or sanding.
Forum: 40. Z-Slide Thu 17 July 2008, 06:03
Replies: 120
Views: 154,515
Posted By Gerald D
Lex, there is a big difference in...

Lex, there is a big difference in stiffness/strength between 2mm and 3mm wall in this case. You also need to tap threads into it. If you really must take 6 meters, use the rest in the underside of...
Forum: 40. Z-Slide Mon 30 June 2008, 12:37
Replies: 120
Views: 154,515
Posted By Gerald D
If it wasn't for the limitation imposed by the...

If it wasn't for the limitation imposed by the gas spring, there would be a lot more travel offered by the rack.

Can't stop admiring the photography!
Forum: 40. Z-Slide Mon 30 June 2008, 05:12
Replies: 120
Views: 154,515
Posted By Gerald D
100 x 6 mild steel flate bar, provided that it is...

100 x 6 mild steel flate bar, provided that it is straight over that short length. The life will be a bit shorter that that of gauge plate. You might 5 years instead of 10 years. :)

Promise you...
Forum: 40. Z-Slide Sun 29 June 2008, 13:18
Replies: 120
Views: 154,515
Posted By Gerald D
Alan, I found the "missing" dimension .........

Alan, I found the "missing" dimension ...... racks needs to be 300 long and not 280. (Well, you did get 250 stroke, so you can't really complain ;)). I see that Kobus sommer stuck all his leftover...
Forum: 40. Z-Slide Sun 29 June 2008, 10:02
Replies: 120
Views: 154,515
Posted By Gerald D
Ah Dassiesfontein, one of those gems that 80% of...

Ah Dassiesfontein, one of those gems that 80% of tourists to this country drive past and don't bother to stop.

Alan, you couldn't have made it clearer than that!

If that was mine, I would...
Forum: 40. Z-Slide Sat 28 June 2008, 12:12
Replies: 120
Views: 154,515
Posted By Gerald D
Alan, I have been hacking at the drawings today...

Alan, I have been hacking at the drawings today (you can see a lot of posts disappear from this thread as I tackle the issues), and the whole z-slide/spring has me pulling my hair out. Can you see...
Forum: 40. Z-Slide Fri 04 April 2008, 09:17
Replies: 120
Views: 154,515
Posted By Gerald D
You could put a "spacer" on top of the standard...

You could put a "spacer" on top of the standard side rails to lift the gantry higher off the table (maybe a square box tube). At this point one is not too worried about the stiffness of the side...
Forum: 40. Z-Slide Thu 03 April 2008, 23:32
Replies: 120
Views: 154,515
Posted By Gerald D
Good question Heath, 1. The longer z-slide...

Good question Heath,

1. The longer z-slide needs taller "side rails" before you get any advantage out of it. The gantry must be higher above the table top and the longer slide lets you "reach"...
Forum: 40. Z-Slide Thu 03 April 2008, 21:03
Replies: 120
Views: 154,515
Posted By Gerald D
Well said Doug. There is no harm in...

Well said Doug.

There is no harm in building the longer z-slide - it might increase the re-sale value one day :)

On a serious note, I added the longer versions as options so that folk could...
Forum: 40. Z-Slide Thu 16 August 2007, 09:40
Replies: 120
Views: 154,515
Posted By Gerald D
I think mild steel will be okay if you can find a...

I think mild steel will be okay if you can find a very straight piece. It can be replaced if it does wear out.
Forum: 40. Z-Slide Wed 08 August 2007, 09:40
Replies: 120
Views: 154,515
Posted By Gerald D
Marc, As many holes as possible must be...

Marc,

As many holes as possible must be used for screws to form a very tight sandwich between the plate and tube. (To stiffen a phone directory you need to clamp the pages together tightly). When...
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