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Thread: todays tools gloat
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8th Apr 2022, 12:08 AM #2476
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8th Apr 2022, 12:23 AM #2477
Hi Dave,
How on earth did you end up with a two phase electricity feed ?
Was it a centre tapped transformer or two real phases from a three phase feed ?
I've only ever heard of supposedly two phase used in America back from the 1930's and two phase from a centre tapped transformer supply. Basically how the US get 120-0-120 volts and 240 volt systems.Best Regards:
Baron J.
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8th Apr 2022, 12:29 AM #2478
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8th Apr 2022, 12:41 AM #2479
https://energis.com.au/2020/02/2-eas...and%20services.
Sent from my 5007U using TapatalkUsing Tapatalk
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8th Apr 2022, 10:47 AM #2480I break stuff...
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Its a rural thing. SWER (single wire earth return) is one way of doing it, using as you say a centre tap transformer.
There also exists what I have here, which is a pair of high voltage lines running down the road, with a transformer on most of the poles stepping down and each feeding off to a handful of properties. Not sure of the transformer arrangement used here, but I'm guessing the transformer at the start of the road could be centre tapped, and the ones on the pole just drop the voltage down. Dunno, but I'm glad I have this version, SWER has a reputation for being pretty horrible in some areas, especially at the end of the line.
In both cases, you end up with 2 phases 180 degrees apart (instead of 120 degrees like 3 phase), giving you 480v phase to phase (instead of 415v), but still 240v phase to neutral.
Practical upshot, is that you can run 480v input VFDs without derating, but given the existance of 240v in/415v out VFDs now, probably only useful for BIG stuff. Can also run welders like my old Kempotig that normally took 2 phases of a 3 phase plug, with smaller cabling than I had when I was running it on 240v in a suburban garage.
Oh, and if you have need for a 350A mig, Unimig make this specifically for this situation: https://unimig.com.au/product/worksh...ge-mig-welder/
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23rd Apr 2022, 10:58 PM #2481Member
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- Aug 2015
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Lathe and milling machine are both up and running.
Both have been sitting patiently for a while now.
The Okuma came out of an aerospace suppliers tool room and they’d had it since new.
The Avia milling machine was not quite as well looked after but has cleaned up very nicely. Unfortunately the Z scale for the DRO seems to have died, possibly the only damage from a pallet that decided to collapse while on the truck.
Had a quick look at my MT4 dividing head to see what it will look like with an adapter to ISO40 and I’d love less stick out but it should work for some jobs coming up.
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6th May 2022, 05:40 PM #2482Diamond Member
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Cute adjustable arbor press
Heavily made for its size, 9" tall, 1" base, 1.5" square arm, 1.125" column. Possibly made for gunsmith work or maybe it was an apprentice project.
IMG_4529.jpg
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6th May 2022, 07:01 PM #2483Most Valued Member
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6th May 2022, 10:32 PM #2484
I like it cos it is a fair dinkum tool and looks like it means business.
This beauty comes from the days when tools were made to perform and no compromises or shortcuts were made.
It is the sort of thing I would buy and know it would perform with out problems in ten or twenty years time.
Grahame
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7th May 2022, 10:44 AM #2485Philomath in training
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10th May 2022, 12:36 PM #2486New Member
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Bob,How is the column attached to the base?.
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12th May 2022, 10:45 PM #2487Diamond Member
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The bottom of the column is threaded, looks like 3/4". The washer between the column and the base is thicknessed so the keyway locates at the rear of the press.
Photo of the underside of the base.
IMG_4533.jpg
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16th May 2022, 12:25 AM #2488Golden Member
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Not really a gloat but this thread seemed the most appropriate to post in.
A mate was moving workshops and asked if I was interested in his old bandsaw, I've been looking for one and jumped on it.
It needs a bit of a cleanup but it's a solid, heavy built unit. made to last!
IMG_2223.jpg
When I was picking it up he offered me his shop press, built by his father at some point, I couldn't say no at the price so it came home with me too
Hydr Press rotated right..jpg
(Grrr.. sideways image) I'm not sure what to do with the press and welcome any ideas, it has a double acting ram and I don't have a power pack so
I'm thinking a budget porta power with a switch valve,
swap the ram for a pneumatic hydraulic 20 tonne jack,
or find an affordable power pack (not sure how likely this last one is)Last edited by Grahame Collins; 16th May 2022 at 07:20 PM. Reason: rotate piccy
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16th May 2022, 01:19 AM #2489Most Valued Member
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Nice score on the goodies. I went the pneumatic way as I didn't have a hydraulic ram, apart from the jack, it's OK, but slow.
If you look on EBay, you can find hydraulic power packs designed for conversion of a 3phase car hoist to a single phase.
Found one on Gumtree https://www.gumtree.com.au/s-ad/sydn...oil/1278928059
Whether it's enough I don't know, but it's a start?
KrynTo grow old is mandatory, growing up is optional.
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16th May 2022, 06:20 PM #2490Golden Member
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Your bandsaw is the same as mine, I picked mine up from a clearing sale maybe 5 years ago (edit- October 2015), paid $300 and it was money well spent. Does yours have a makers badge on it? Mine has an oval badge that originally would have had an enamel maker's logo but the enamel is long gone and only the metal backing remains so I have been unable to identify the maker. It is a copy of a Wells #8 which is a sought-after American saw; I have wondered if perhaps mine (and now yours) is a Macson made under license. The Wells takes a 1" blade whereas mine is a 3/4". The motor on mine is an antique Australian motor, don't recall the brand. Youtuber Tubal Cain / Mr Pete has a video on the Wells #8. One of these days I will add a coolant system to mine, the drain is a challenge because of the leg arrangement.