OK Hands up

[cliff]

[al_kaholik]

Re: OK Hands up

Hot parrafin wax treatment is meant to help with the hands and feet - you can get home kits, my girlfriend's gran (at 95 on Saturday!) uses one fairly regularly to help with hers.

Have a great time away

[Ian]

Re: OK Hands up

I get discomfort in my hands and feet although it's not consistent. Sometimes just the fingers of one hand or sometimes the meaty part of the palm. Sometimes nothing! Putting it down to old age

Ian

[StephenL]

Re: OK Hands up

I get discomfort in my hands and feet although it's not consistent. Sometimes just the fingers of one hand or sometimes the meaty part of the palm. Sometimes nothing! Putting it down to old age

Ian

Ian, you're nobbut a sprog!

[Ian]

Re: OK Hands up

Ian, you're nobbut a sprog!

Haha - if your birthday the other day is correct I'm only 10 years behind you!

Ian

[cliff]

Re: OK Hands up

Thanks guys, the new drugs are working so well I've stopped taking any pain killers, so I feel great
Nairobi job just confirmed so should be off once the kit has been rented itemized and packed.
Took some trail shots in Richmond park on sat.
,
Needs more practise

Cliff

[Ulfric M Douglas]

Re: OK Hands up

Tell me about the heat treatment, that's (part of) my thing ...

[cliff]

Re: OK Hands up

Hi Ulfric, ok we do repairs to crankshafts and sometimes when they fail the trauma causes hard spots to form which must be removed as they can cause cracks or worse, if there is enough metal you may be able to machine them out if it's not to deep, if you only have limited metal you can heat treat the crank in situ and then finish machine and polish to the bearing size.
you do a heat profile so heat it up slowly 30 Deg c per hr then soak for say 4 hrs @ say 600 Deg c then cool @ 30 Deg c per hr until 200 deg c switch off allow to cool to ambient temp while drinking beer
next check for bend and use a ball pean hammer to straiten if necessary

HARD SPOTS
,
AFTER HEATING
,
CERAMIC HEATING BLANKETS
,

It doesn't always work as sometimes you cant fix the bend and you cant do it if their are any cracks, but due to the replacement cost of a crank and not to mention the cost of cutting a big hole in the side of your ship etc. it's worth a go

Cliff

[Phill D]

Re: OK Hands up

That's either a b***** big crankshaft or you've got pretty close up, what is it from?

[cliff]

Re: OK Hands up

Hi Phill, yes this ones out of a power STN in Turkey

For scale


Cliff

[Bluegrass Jim]

Re: OK Hands up

Hello Cliff,
I like the photos of your work anything to do with mechanical engineering is interesting to me, that's a proper crankshaft you've got there! What sort of weight is it and do you hammer it by hand or machine? I presume you need to balance it after treatment or do you machine it off evenly?
Regards Jim.

[cliff]

Re: OK Hands up

Thanks Jim for your kind comments, if I can remember I think it was about 7 tons
all the peaning is done by hand with a 3lb hammer
we use a tooling head to turn off the metal with a single point tool, running in the hopefully undamaged radii at the sides of the journal as our datum using nylon pads and driven using a chain drive

Tooling head
,
Hammers
,
peaned surface
,
peaning in the engine
,
heaters in place

,

Cliff

[Ulfric M Douglas]

Re: OK Hands up

So the metal sometimes "bulges" during failure (or not?) and you can (heat it up then) beat it into submission and re-lathe it in-situ and heat treat with a cute pink electric blanket?

Cool.

I'm very glad I asked.

Yesterday I was heat-treating too
Smithing flat a few big allen-keys, did a water quench to see if they were going to get hard enough ... oh yeah.
It told me they're going to be good with an oil quench when I've fire-welded them into some edges.

[Iansky]

Re: OK Hands up

Great to hear you have the new camera, did it come with a free bag of spuds or just the grip?

[cliff]

Re: OK Hands up

Great to hear you have the new camera, did it come with a free bag of spuds or just the grip?

He he, no spuds but I did get a pack of envelopes and a book of stamps to send off for the grip and mmf3, I picked it up on the way to a job in Portsmouth and got the first play with it in the hotel room that evening here are the first shots from the hotel window, I think they are nice and sharp but then it was an Ibis hotel window

,