Today I acquired...........

[James1979]

Today I acquired the V5 for my new to me van (thread elsewhere) Checked it over, the maximum braked towing limit is 1200kg, That surprised me, as I thought it was only 800kg. Opens up more opportunities as we are supposed to be building a trebuchet this year

Things you thought you’d never hear in 2022

 

[Hood]

Things you thought you’d never hear in 2022

I would say things you are more likely to hear, well going by the way society seems to be evolving, or not as the case may be .

 

[MattF]

or not as the case may be .

That part seems most fitting, the way things are going.

 

[Hood]

Today I acquired a couple of cheap ball end slot drills.

It is to make up a load of these from Acetal, hence why they don't have to be top quality, well as long as they are dimensionally ok.

I have modified the steering joints I make for the Cats to incorporate replaceable wear parts, previously I just milled a round hole in the phosphor bronze for the stainless ball end rod to sit. Works fine but after a few years they start to rattle. Very little wear, not enough to affect their performance but it does introduce a metallic clatter when the outboards are idling.

So on current ones I will mill a square pocket for the inserts.

On any future ones I will make them two part and likely from 5083 aluminium which will cut the costs considerably.

 

[slim_boy_fat]

@Hood I've no idea re cost differential, but would Delrin be better for your application? Just a thought after Googling revealed this https://www.emcoplastics.com/acetal-vs-delrin/

 

[Onoff]

That surprised me, as I thought it was only 800kg. Opens up more opportunities as we are supposed to be building a trebuchet this year

I bet that threw you for a minute.

 

[Maker]

@Hood I've no idea re cost differential, but would Delrin be better for your application? Just a thought after Googling revealed this https://www.emcoplastics.com/acetal-vs-delrin/

I think they're the same thing (POM), Delrin is just what DuPont originally marketed it as.

 

[Hood]

Centreline porosity would likely be the main issue with Delrin due to the way I will make them. That being said the differences in strength etc is minimal and for this application will make little difference. Also if they don't last quite so long (unlikely in the grand scheme of things) it means I have to make replacements sooner

 

[slim_boy_fat]

I think they're the same thing (POM), Delrin is just what DuPont originally marketed it as.

Did you read the link? Seems there are subtle differences.

 

[Hood]

I think they're the same thing (POM), Delrin is just what DuPont originally marketed it as.

Yes they are both POM, Delrin is POM-H and Acetal can be POM-H or POM-C but as you say Delrin is the brand name of DuPont.

 

[Maker]

Did you read the link? Seems there are subtle differences.

I did not.

 

[25.4_mechanic]

Today I acquired still more fodder for the little Myford:

Harold Hall's 230M07 was - contrary to his prediction - not available here, so I ordered 9 S Mn 25k in 40, 25 and 6mm.

Let's make some chips

Have a loveley weekend all

Carsten

--

 

[droopsnoot]

I found another metal cupboard and a 2-drawer metal filing cabinet on the scrap pile yesterday. The cupboard is identical to another two that I found last year, but has the advantage of having a key - the doors don't have a catch, they only stay closed if you can lock them, so the other two just have something placed in front of them. These are the ones that are apparently from a bank, and made from something like 3mm steel.

 

[roofman]

Whilst ordering a drag link for my nissan truck from the main dealer today i noticed a skip around the back...Oh yea lets go rooting. The wife was not happy when i got home and dragged this out of the boot of her S class merc. Sticking unloader valve, and done away with the water holding tank and now have it unloading back into the pump,nice little 100 bar interpump too. Scruffy hound but now works perfect and off-set the money i spent on the drag link.

 

[DennisCA]

Good luck!

Carsten

--

The wood was already tipped into my shed when I got home, just had to pay him.

Snowstorm keeps getting worse though. I didn't plow the driveway and when my SO came home she got too close to one snowbank and the car got stuck. Had to dig the car free, fortunately our neighbor (who is an MP) came driving home just at that time, all the way from Helsinki and helped us dig the car out, talk about public servant. Had to put a board under one wheel to get it free. Tomorrow I got some plowing todo, probably 30cm coming down this evening and it's still coming.

 

[selectedgrub]

My mum had one!

Do you know if they were a pale yellow or white.
I think this is age stained.

 

[selectedgrub]

I added to my tools required to dominate the electronic world.

 

[DAPPH]

Today I acquired a couple of cheap ball end slot drills.

View attachment 331067


It is to make up a load of these from Acetal, hence why they don't have to be top quality, well as long as they are dimensionally ok.

View attachment 331068


I have modified the steering joints I make for the Cats to incorporate replaceable wear parts, previously I just milled a round hole in the phosphor bronze for the stainless ball end rod to sit. Works fine but after a few years they start to rattle. Very little wear, not enough to affect their performance but it does introduce a metallic clatter when the outboards are idling.

View attachment 331069


So on current ones I will mill a square pocket for the inserts.

View attachment 331070

On any future ones I will make them two part and likely from 5083 aluminium which will cut the costs considerably.

View attachment 331071

3D print the blocks or will they not be strong enough ?

 

[GRW]

I've been working away in Caernarfon all week - so I've only just got to look at the Record Leader 24" Stilsons I bought before I left.

Happily it's a mint bit of kit. The jaws are sharp and in brilliant nick and its spot on. I'd never seen/heard of a "Record Leader" tbh, nor seen this design. Turns out there is a spring against either face of the adjustable jaw in the head - so the jaw doesn't rattle & flap about like regular Stilsons. A nice bit of solid kit for cheap Chinesium money.

(Also my Compressor Reciever has dried out nicely while I was gone, and the Phosphoric has treated some of/ worst of the rust )

 

[Hood]

3D print the blocks or will they not be strong enough ?

Don't have a 3d printer but even if I did I reckon there are at least a few reasons they would not be as good.
1. Strength/rigidity, I reckon Acetal will be a lot better than most common printed plastics
2. Friction, Acetal is low friction, I think most 3D printed materials would have more friction.
3. Time, it will take me under 1 minute to make one, I reckon 3D printing will take longer.