Primus lamp wick feeder pinion

[Steamwhisperer]

I was asked by a family member if I could make a pinion for a Primus table lamp he was restoring. He doesn't have any problem importing parts for his lamps and stoves but it seems there were none available.
He gave me the broken and worn bits to copy. He also had to cut it up to remove it from the lamp.
As usual, making the accessories to be able to complete the pinion took longer than actually doing the job. :D
I really should hurry up and get a milling machine. :((

Phil

374086 374087 374088 374089

[KBs PensNmore]

Nice work on the wick feeder, the diameter appears to be around 6mm, is that close?
Strange how it seems to always be that making the accessories takes longer than doing the job, but then that's half the fun.
Kryn

[NedsHead]

Careful, we might start calling you kerowhisperer.

Nice work with the replacement pinion shaft though, it's good to see there are a few other people interested in these old lamps.

Do you know the model the replacement pinion is for?

I have to do a similar job for a pressurised kero lamp, the pinion that control's the pricker is broken on one of my lanterns and a replacement will have to be made, how did you do the indexing?

Cheers.

Ben

[Grahame Collins]

It is good to see you back.

Thank you for posting. I find your project interesting and I am fascinated by the how to's of the job.

The indexing was but one question.

How do you measure the angle and the depth of the pinion teeth on something that small?

Is the cutter HSS?

Thanks

Grahame

[Steamwhisperer]

Nice work on the wick feeder, the diameter appears to be around 6mm, is that close?
Strange how it seems to always be that making the accessories takes longer than doing the job, but then that's half the fun.
Kryn
Hi Kryn
you are just about spot on with the size of the head though the hard part was machining the shaft unsupported over that length. I had to leave it a bit longer as there is a knob that goes on the end and I wasn't quite sure of the exact length. The owner will work that out when he installs it.
To machine it I used the time honoured method of machining it down to just above final diameter in short lengths to keep as much support as possible, then using a stone, hone the 'neutral' rake and take a final cut. It ended up ok.

Phil


Careful, we might start calling you kerowhisperer.

Nice work with the replacement pinion shaft though, it's good to see there are a few other people interested in these old lamps.

Do you know the model the replacement pinion is for?

I have to do a similar job for a pressurised kero lamp, the pinion that control's the pricker is broken on one of my lanterns and a replacement will have to be made, how did you do the indexing?

Cheers.

Ben
Hi Ben
sorry but I have to disagree on it being an interest, it's more of a sickness:D. I am still getting some steam stuff to do but sadly not like before :((.
I'm not sure of the model, I could find out later today. He gave me a sheet with the part on it though it didn't really help. (see pic)
I am now wondering if it was a stove...now I 'have' to find out :-.
One thing of interest is that it was made by B A Hjorth and Co. which is BAHCO...well 'I' found it interesting :D.
I'll do another thread on the indexer which was another of those jobs I had been meaning to do for a long time.


Phil

374095

[Steamwhisperer]

It is good to see you back.

Thank you for posting. I find your project interesting and I am fascinated by the how to's of the job.

The indexing was but one question.

How do you measure the angle and the depth of the pinion teeth on something that small?

Is the cutter HSS?

Thanks

Grahame
Hi Grahame
thanks for the welcome back, it's highly unlikely that I'll take another hiatus like that again:D
I'll be doing another thread on the indexer, it's ever so slightly different from your normal lathe spindle indexer as it was driven from 'what I had laying around in the shed' :-.
To get the right tool form there was a lot of painstaking grinding and checking through every tooth of the old pinion until I got a decent fit through the entire length of every tooth, averaged. I really had nothing to go off and no specs at all. The OD looked untouched so full depth was determined by the width of the lands across the top of the tooth, it looked ok when I got to my 'guessed' depth.
The cutter is made out of high speed steel and given a neutral rake which made it cut like a hot knife through hot butter on a hot day in the middle of summer on the equator.

Thanks again for the welcome back
Phil

[jack620]

Nice work Phil. Nice job on the tool grinding too. Mine never look like that! I assume you have a T&C grinder?

[simonl]

Yea, Welcome back Phil. Great to see you posting again!

Still can't believe you don't own a mill. Looking at some of the stuff you have made, you wouldn't know. Nice job on that wick feeder part. Making a new copy from a worn part is an art form in itself. I can really appreciate the level of effort you went to in order to make a new part minus the wear!

Cheers,

Simon

[Steamwhisperer]

Nice work Phil. Nice job on the tool grinding too. Mine never look like that! I assume you have a T&C grinder?
Oh don't I wish I had a tool and cutter grinder :D. Nah I ground it freehand on the grinder although I probably shouldn't say that as I got flamed, no torched, no actually cremated the last time I said I could grind a tool freehand :D:D:D. After 40 years of using HSS... though I am warming to this new carbide stuff:wink:.


Yea, Welcome back Phil. Great to see you posting again!

Still can't believe you don't own a mill. Looking at some of the stuff you have made, you wouldn't know. Nice job on that wick feeder part. Making a new copy from a worn part is an art form in itself. I can really appreciate the level of effort you went to in order to make a new part minus the wear!

Cheers,

Simon
Thanks Simon, it's good to be posting again though not much of the 'fun' stuff to post anymore. Still there might be some later.
I'm hearin' ya regarding the mill though I am now about to elevate to nagging level with the missus, not that it has ever worked in the past. :((

Phil

[simonl]

Easier to ask for forgiveness than it is permission Phil!

[emoji16]

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