What are you machining?

[lchris21]

.........the worlds most over engineered Olive oil bottle top ............struggled to find the thread details in my Zeus book ......think it was BSB, British Standard Bottle ?

 

[Agroshield]

...struggled to find the thread details in my Zeus book...

Try here:

Knuckle Thread DIN 168

 

[lchris21]

Try here:

Knuckle Thread DIN 168

well well well.............every day is a school day!..............I used my eyecrometer in the end. Cheers

 

[dan.taylor.1]

They've messed up Whitworth and bsf/bsc/bsp on there though...

 

[Brad93]

.........the worlds most over engineered Olive oil bottle top ............struggled to find the thread details in my Zeus book ......think it was BSB, British Standard Bottle ?
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That is impressive

 

[Agroshield]

They've messed up Whitworth and bsf/bsc/bsp on there though...

I have to ask please what you have seen that is incorrect as I could not see anything obvious on BSW and BSF (near the bottom of the page in green). They have the wrong imperial major dia. on BSPP (but correct metric major dia.). Also, I could not see BSC at all (normally denoted BSCy and 60 degree thread angle).

 

[dan.taylor.1]

I have to ask please what you have seen that is incorrect as I could not see anything obvious on BSW and BSF (near the bottom of the page in green). They have the wrong imperial major dia. on BSPP (but correct metric major dia.). Also, I could not see BSC at all (normally denoted BSCy and 60 degree thread angle).

Just the naming, like that they've called bsf (British standard fine) Whitworth fine and bspt Whitworth pipe tapered, I know most bs threads are derived from Whitworth but I've never seen bspt referred to as a Whitworth thread.

 

[dan.taylor.1]

And I mean British standard coarse by BSC is this not the correct acronym?

 

[Brad93]

Just the naming, like that they've called bsf (British standard fine) Whitworth fine and bspt Whitworth pipe tapered, I know most bs threads are derived from Whitworth but I've never seen bspt referred to as a Whitworth thread.

It's 55° so technically it is

 

[Agroshield]

Just the naming... ...and I mean British standard coarse by BSC is this not the correct acronym?

Thanks. I was concerned there was something wrong with the numbers. As the site is German, we can perhaps allow them a little slack on the nomenclature.

Initially, when Joe Whitworth standardised the threads, there was no fine series, so there was no need to call them coarse. They were just BSW or British Standard Whitworth. Later, when the fine series was standardised, it was named BSF, British Standard Fine to distinguish it from BSW. It is very similar to the way metric threads are designated - you have ISO metric, which is the standard coarse series and then metric fine.

Sorry I misunderstood your abbreviation. There is yet another obscure British thread, called British Standard Cycle or BSCy. This was used on bicycles and early motorbikes. It has imperial dimensions, is a fine thread for its diameter and is 60 degree vee-angle. I have now found BSCy on the site above, it is under CEI thread (https://www.gewinde-normen.de/en/cei-thread.html). BSCy is sometimes hard to distinguish from BSB, British Standard Brass, which has a number of identical or shared diameter/pitch combinations but is 55 degree vee-angle.

 

[dan.taylor.1]

Yeah I'm aware of the cycle thread, had to repair a few when I was a bike tech as my first job. Every day is a school day, my grandad says if you don't learn something new every day you weren't paying attention.

 

[Lewis_RX8]

Making a die holder at the moment for a training piece

The lecturer liked my two nuts together trick for how to sharpen drill bits that works on big or small ones just as good

Still getting better at the sharpening as I go but Intresting doing it on 24mm drills not the 10mm or so I'm used to doing

 

[Dcal]

Today I machined a part for a fire wood processer.

The original part was very sloppy so I turned a new one with tighter tolerances.

We will see if it makes any difference to the operation of the machine.

 

[Lewis_RX8]

Wrote out a nice message here but refreshed and deleted it bugger

Bit of playings on the training lathe not my own , trying to achieve a nice finish with the inserts and tool we had. First tried the manufacture recommended speeds and feeds however these where the quite fast and hard which did get a nice mirror shine off the cut however was a lot of grooves and deep lines chatter and stuff as not sure if these lathes 2hp and not very rigid can really handle that may have been some slop somewhere did try tightening gibs but not a huge help.

Then a mate recommended the complete opposite low feed and low speed thought hmm that seems like it'll work even less but worked quite well IMO , insert spec sheet shown and it was set at

80 then 180 RPM same finish
0.001 inch per rev / 0.03 mm per rev feed
Coolant flood

Only thing is with those speeds / feeds its a boring job lol sitting there waiting for it to travel across only good for final finishing dimension cuts but also works well for that as can tickle off a few thou easily and still produce a good finish rather than being stuck with needing to take a bigger DOC for proper carbide speeds / feeds

Camera makes the finish look worse I think picks up all the lines but really impressed with finish really smooth doesn't catch fingernail and can see reflections in it

 

[fizzy]

Wrote out a nice message here but refreshed and deleted it bugger

Bit of playings on the training lathe not my own , trying to achieve a nice finish with the inserts and tool we had. First tried the manufacture recommended speeds and feeds however these where the quite fast and hard which did get a nice mirror shine off the cut however was a lot of grooves and deep lines chatter and stuff as not sure if these lathes 2hp and not very rigid can really handle that may have been some slop somewhere did try tightening gibs but not a huge help.

Then a mate recommended the complete opposite low feed and low speed thought hmm that seems like it'll work even less but worked quite well IMO , insert spec sheet shown and it was set at

80 then 180 RPM same finish
0.001 inch per rev / 0.03 mm per rev feed
Coolant flood

Only thing is with those speeds / feeds its a boring job lol sitting there waiting for it to travel across only good for final finishing dimension cuts but also works well for that as can tickle off a few thou easily and still produce a good finish rather than being stuck with needing to take a bigger DOC for proper carbide speeds / feeds

View attachment 319394View attachment 319393View attachment 319395

Camera makes the finish look worse I think picks up all the lines but really impressed with finish really smooth doesn't catch fingernail and can see reflections in it


View attachment 319397View attachment 319396

Time to get those tools I linked to.
Yesterday though I was just turning down a bar to act as a spacer. In a bit of a rush pushed the old Triumph a lot harder. Seriously deep cut could actually hear the lathe working. The swarf flying off was golden brown and smoking - best finish I have ever had with a cnmg or whatever they are called

For normal use though I prefer those sharp aluminium cutting tips.

 

[Lewis_RX8]

Time to get those tools I linked to.
Yesterday though I was just turning down a bar to act as a spacer. In a bit of a rush pushed the old Triumph a lot harder. Seriously deep cut could actually hear the lathe working. The swarf flying off was golden brown and smoking - best finish I have ever had with a cnmg or whatever they are called

For normal use though I prefer those sharp aluminium cutting tips.

Yup those tips really need pushed on a ridgid powerful lathe to get a good finish I think , not sure how the YouTubers make it look so easy lol

Yes ground / polished inserts for aluminium is the next try

 

[fizzy]

Well the Triumph is certainly capable of those cuts

 

[minimutly]

Time to get those tools I linked to.
Yesterday though I was just turning down a bar to act as a spacer. In a bit of a rush pushed the old Triumph a lot harder. Seriously deep cut could actually hear the lathe working. The swarf flying off was golden brown and smoking - best finish I have ever had with a cnmg or whatever they are called

For normal use though I prefer those sharp aluminium cutting tips.

If you don't have to jump out of the way now and again you're not trying @fizzy

 

[Lewis_RX8]

If you don't have to jump out of the way now and again you're not trying @fizzy

oooh aaah ouch eeee as the blue hot chips fall down your collar

 

[fizzy]

If you don't have to jump out of the way now and again you're not trying @fizzy

You are right there only baby cuts in the past.