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Type: Posts; User: elanjacobs
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19th Apr 2024, 04:49 PM
Thread: Engineering plastics offcuts Melbourne
by elanjacobs- Replies
- 4
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- 78
Got some dimensions? "Small blocks" is a bit vauge
Got some dimensions? "Small blocks" is a bit vauge
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8th Apr 2024, 03:21 PM
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[VIC] Engineering machinery auction closing April 9
https://gollantauctions.hibid.com/catalog/534118/major-sheetmetal-and-engineering-machine-auction?s=BID_AMOUNT_HIGH_TO_LOW
Lots of stuff, bids haven't gone insane yet -
3rd Apr 2024, 06:42 PM
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Mmmmm ground worms; very pretty, very pricey
Mmmmm ground worms; very pretty, very pricey
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31st Mar 2024, 06:18 PM
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What's the chain length of the old hoist?
What's the chain length of the old hoist?
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30th Mar 2024, 08:48 PM
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Still wrong :wink: In fact it's arguably worse...
Still wrong :wink:
In fact it's arguably worse because at least free hobbing is a generated profile that will exactly match the corresponding thread as it rolls. The tooth profile of a worm wheel... -
28th Mar 2024, 04:45 PM
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The gear cutter in me hates this so much, but it...
The gear cutter in me hates this so much, but it falls squarely in the "good enough for the hobbyist" camp so I guess I can't be too mad about it.
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3rd Mar 2024, 09:46 PM
Thread: Atlas surface grinder is reborn.
by elanjacobs- Replies
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- 451
A high speed spindle would likely be running a...
A high speed spindle would likely be running a light oil, probably something like ISO 15 or lighter; some even go as light as ISO 5. Grease can lead to overheating if it's too thick.
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29th Feb 2024, 09:29 PM
Thread: Mystery Steel ID
by elanjacobs- Replies
- 9
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- 585
The charts are supplier specific; unless you know...
The charts are supplier specific; unless you know where the material came from, the paint is meaningless.
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17th Feb 2024, 10:44 PM
Thread: CNC metal cutting questions
by elanjacobs- Replies
- 23
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- 900
I can do a quick dxf in autocad if you need
I can do a quick dxf in autocad if you need
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15th Feb 2024, 05:47 PM
Thread: CNC metal cutting questions
by elanjacobs- Replies
- 23
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- 900
Looking around at places that do laser cutting,...
Looking around at places that do laser cutting, the going tolerance seems to be +/- 4 or 5 thou. The theoretical limit of fibre laser is supposedly 1 thou, but that would likely take multiple test...
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14th Feb 2024, 10:35 PM
Thread: Hydraulic cylinder end cap threads ?
by elanjacobs- Replies
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- 668
https://www.insanehydraulics.com/library/tubemaxpr...
https://www.insanehydraulics.com/library/tubemaxpressurecalculator.html
Found this calculator which says it should comfortably handle 800psi, I guess we'll find out -
13th Feb 2024, 05:01 PM
Thread: ISO50 Tool Holders
by elanjacobs- Replies
- 22
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- 1,797
Just following up, doesn't look like we have any...
Just following up, doesn't look like we have any available; we scrapped a bunch that were properly buggered, the rest were integrated into our fleet. If anything changes I'll let you know.
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5th Feb 2024, 10:14 PM
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Never done a MW, but Mitutoyo, Starrett, and Tesa...
Never done a MW, but Mitutoyo, Starrett, and Tesa all just have a screw in the end that holds the ratchet together. Have you tried holding the large blue bit and unscrewing the small blue bit?
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3rd Feb 2024, 10:39 PM
Thread: Vernier callipers
by elanjacobs- Replies
- 44
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- 3,168
Re: SR44 vs LR44 (silver vs lithium); it's not...
Re: SR44 vs LR44 (silver vs lithium); it's not just the voltage that's different, the silver chemistry has a much more stable output than lithuim and will maintain voltage for nearly all of its life,...
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2nd Feb 2024, 03:11 PM
Thread: Vernier callipers
by elanjacobs- Replies
- 44
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- 3,168
I would take digital over vernier any day. It's...
I would take digital over vernier any day. It's just so much more convenient.
Insize make nice tools that don't cost a fortune -
28th Jan 2024, 01:25 PM
Thread: Extruded Austral Bronze 602
by elanjacobs- Replies
- 3
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- 461
Googled 602 bronze and found: ...
Googled 602 bronze and found:
https://dl.asminternational.org/alloy-digest/article-abstract/10/9/Cu-106/911/MUELLER-602-BRONZEBearing-Bronze-Alloy?redirectedFrom=fulltext... -
25th Jan 2024, 06:23 PM
Thread: Spring compression by rotation?? Help
by elanjacobs- Replies
- 16
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- 1,063
Soo......buy a battery hammer drill. Seriously,...
Soo......buy a battery hammer drill. Seriously, anything you attempt to make will be worse than what you can buy for a couple of hundred dollars.
I'm all for DIY projects, but sometimes they're... -
24th Jan 2024, 09:23 PM
Thread: ISO50 Tool Holders
by elanjacobs- Replies
- 22
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- 1,797
Any specific style of holder? We have a tub of...
Any specific style of holder? We have a tub of spare 50 taper holders (no idea which flavour of 50 taper) at work after we retired an old mill, there's still another machine that uses them but not...
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24th Jan 2024, 04:39 PM
Thread: Spring compression by rotation?? Help
by elanjacobs- Replies
- 16
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- 1,063
The real question is why you want to make one...
The real question is why you want to make one when you can buy a cheap hammer drill or air chisel or needle scaler for probably less than the cost of the materials you'd need to make it
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23rd Jan 2024, 06:06 PM
Thread: Spring compression by rotation?? Help
by elanjacobs- Replies
- 16
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- 1,063
Congratulations, you've invented the impact...
Congratulations, you've invented the impact driver :2tsup:
https://www.reddit.com/r/educationalgifs/comments/2pzbbv/how_an_impact_wrench_works/ -
11th Jan 2024, 05:38 PM
Thread: Tiny dies mystery
by elanjacobs- Replies
- 2
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- 406
I think Steve might be right. The British...
I think Steve might be right. The British Standard Cycle thread (because OF COURSE they have to have a new standard for everything) looks like it lines up; the 8G is listed as 40 tpi, but the OD is...
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7th Jan 2024, 09:12 AM
Thread: WTB narrow bodied 4 jaw chuck
by elanjacobs- Replies
- 13
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- 1,605
This guy seems to have a few on his store; not...
This guy seems to have a few on his store; not cheap but they're hard to find (as I'm sure you well know), so you have to pay the rarity tax https://www.ebay.com.au/itm/235343651076
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1st Jan 2024, 09:15 PM
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Google search says $1.10-1.50/kg for clean lead...
Google search says $1.10-1.50/kg for clean lead and 30-40c/kg for batteries.
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31st Dec 2023, 10:18 PM
Thread: Parting off tool - small
by elanjacobs- Replies
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- 1,376
You can get no-name 12mm and 1/2" insert tooling...
You can get no-name 12mm and 1/2" insert tooling pretty cheap from the usual online suspects (Amazon/AliExpress/etc)
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29th Nov 2023, 05:44 PM
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They look very similar to the DGN style we use at...
They look very similar to the DGN style we use at work (Iscar Do Grip), I'd give them a go
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19th Nov 2023, 08:32 PM
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- 813
I'm sure you could just change the design to take...
I'm sure you could just change the design to take a DCMT insert for less tool engagement if you're worried about cutting force.
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15th Nov 2023, 05:26 PM
Thread: Dovetail angle measurement
by elanjacobs- Replies
- 8
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- 709
The amateur-tractor method...for when you don't...
The amateur-tractor method...for when you don't have a pro-tractor :p
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12th Nov 2023, 12:18 PM
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Not that. Should have said compact laminate; it's...
Not that. Should have said compact laminate; it's the same stuff but a solid sheet, not just a veneer on top.
Very hard, very dense, very expensive...see if you can find a cut-to-size service... -
9th Nov 2023, 09:21 PM
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A sheet of high pressure laminate works great as...
A sheet of high pressure laminate works great as a CNC router bed
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6th Nov 2023, 10:27 AM
Thread: How is this piece done?
by elanjacobs- Replies
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Making something yourself that you can easily buy...
Making something yourself that you can easily buy is basically never a better choice. I would buy the off the shelf product first and see if it does what you want and only bother making something if...
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5th Nov 2023, 09:55 AM
Thread: How is this piece done?
by elanjacobs- Replies
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1mm rod? 2 pairs of pliers and bend it by hand lol
1mm rod? 2 pairs of pliers and bend it by hand lol
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25th Oct 2023, 09:47 PM
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It looks dodgier than it is. Once you tighten the...
It looks dodgier than it is. Once you tighten the chuck it's completely solid; no different to using soft metal pads with hard jaws to protect the job.
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25th Oct 2023, 04:39 PM
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One of the guys at work had an interesting way of...
One of the guys at work had an interesting way of getting around protruding features...
404190 -
12th Oct 2023, 07:20 PM
Thread: Lathe Gears Question.
by elanjacobs- Replies
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- 1,780
Correct. Leadscrew pitch is usually a nice round...
Correct. Leadscrew pitch is usually a nice round number, either in mm or fractional inches (module and DP pitch leadscrews do exist, but highly unlikely in this case), so you should be able to stick...
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11th Oct 2023, 08:01 PM
Thread: Lathe Gears Question.
by elanjacobs- Replies
- 15
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- 1,780
The seller is correct. As mentioned by others...
The seller is correct. As mentioned by others here, a reversing idler can be any number of teeth and will change nothing but the direction.
EDIT: As pointed out by Michael....that is definitely a... -
5th Oct 2023, 09:04 PM
Thread: Fanuc fun (yellow cap servos)
by elanjacobs- Replies
- 15
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- 2,000
Fun little factoid I heard recently from one of...
Fun little factoid I heard recently from one of our machine reps...Fanuc guarantee spare parts availability for everything they've ever made :oo:; if it's obsolete, they'll make whatever adaptors are...
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4th Oct 2023, 09:59 PM
Thread: Rod Bender 3mm - 6mm
by elanjacobs- Replies
- 4
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- 660
If you want to go real bush mechanic you can just...
If you want to go real bush mechanic you can just cut some forms/dies out of hardwood to press the shapes in a bench vice; I have successfully done this for 30x3mm brass, I'm sure 6mm steel rod...
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20th Sep 2023, 07:47 AM
Thread: Emo 2023
by elanjacobs- Replies
- 25
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- 2,022
I've been too busy getting buttered up by sales...
I've been too busy getting buttered up by sales reps to do much "tourist" stuff yet :p didn't even stop to have lunch on Tuesday (the nice people at Gleason fed me on Monday)
Did wander into DMG... -
6th Sep 2023, 05:00 PM
Thread: Making a Cast Iron Lap
by elanjacobs- Replies
- 17
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- 1,502
https://www.machines4u.com.au/search/jointer/?tor=...
https://www.machines4u.com.au/search/jointer/?tor=3&d_f_m=100&conditionfacet=Used&order=pricenotax
Seems a shame to pull apart machines of such high quality just to use as a lap, but the cheapest... -
21st Aug 2023, 05:45 PM
Thread: The effect of lubrication !
by elanjacobs- Replies
- 10
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- 925
https://en.wikipedia.org/wiki/Cutting_fluid#:~:tex...
https://en.wikipedia.org/wiki/Cutting_fluid#:~:text=Water%20is%20a%20good%20conductor,create%20an%20optimal%20cutting%20fluid.
Internet says no :no:
Purely as a cooling agent it's great, which... -
20th Aug 2023, 11:34 PM
Thread: The effect of lubrication !
by elanjacobs- Replies
- 10
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- 925
Cutting fluid serves 3 purposes: cooling,...
Cutting fluid serves 3 purposes: cooling, lubricating, and flushing.
Because they're almost always working with steel where you can get away with minimal/no cutting fluid because it's not a... -
19th Aug 2023, 09:04 PM
Thread: Machining Bakelite?
by elanjacobs- Replies
- 14
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- 1,094
I've done a fair amount of work with Tufnol...
I've done a fair amount of work with Tufnol (cotton reinforced bakelite) and would not recommend it in sliding applications on steel as it's quite abrasive on cutting tools; I'm assuming shock forks...
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14th Aug 2023, 06:52 PM
Thread: When do you use angles?
by elanjacobs- Replies
- 8
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- 859
There's angles all over the place making gears,...
There's angles all over the place making gears, but the machines all have vernier scales on the head (either 5 or 1 minute divisions, except for one German machine that has a 6 minute scale because...
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13th Aug 2023, 02:36 PM
Thread: !/4"drive screw driver bits
by elanjacobs- Replies
- 9
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- 834
Wera bits are really nice
Wera bits are really nice
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13th Aug 2023, 01:20 AM
Thread: Reamer ID?
by elanjacobs- Replies
- 6
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- 980
Thanks to the nice people of Reddit, we have an...
Thanks to the nice people of Reddit, we have an answer. It's a duplex reamer https://gammons.com/duplex-chucking-reamers-morse-taper-shank
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11th Aug 2023, 03:33 PM
Thread: A trap for an old player...
by elanjacobs- Replies
- 14
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- 1,198
Or one (1) shifter :p
Or one (1) shifter :p
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10th Aug 2023, 05:36 PM
Thread: A trap for an old player...
by elanjacobs- Replies
- 14
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- 1,198
Some bicycle threads are half/half as well with...
Some bicycle threads are half/half as well with metric OD and imperial pitch https://www.parktool.com/en-int/blog/repair-help/basic-thread-concepts#article-section-6
Just...why??? -
3rd Aug 2023, 06:32 PM
Thread: Lathe Lead Screw Protection Video
by elanjacobs- Replies
- 6
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- 760
Cute idea, but I'd rather spend the few hundred...
Cute idea, but I'd rather spend the few hundred dollars for a proper steel one https://assetplant.com.au/product/sm-20-series-lathe-lead-screw-cover-1000-mm-long-with-brackets/
What really... -
30th Jul 2023, 11:10 AM
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I see we're doing 3rd world machine shop videos...
I'd probably hire some of these guys; if they can do that with what they have, imagine what they could do in a modern shop
https://www.youtube.com/watch?v=Wm6olzTXslI -
30th Jul 2023, 11:07 AM
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- 546
Lol seen that one before and I'm genuinely...
Lol seen that one before and I'm genuinely impressed with what they can do with so little. It's obviously going to be more of a "gear shaped object" than an accurate gear, but in a low speed...