[modeleng] Re: Renold jig chain
- From: Jesse <fernj1@xxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Wed, 22 May 2013 15:55:08 -0500
For why are we wanting to drill this type chain. FWIW, I built a nice
chemical dip vat for treating lumber against mold and insect damage. The
vat would hold a large pack of lumber , automatically lower it into the
chemicals and after a few minutes raise the pack up to allow excess
chemical to drain off. After about a year or so of flawless operation,
the chain broke. I checked with chain manufacturer and was told that the
chemicals would penetrate the hardened steel chain links and make them
brittle. The chemicals would have no effect on soft iron chain
according to the chain company, but they did not make multiple link
chain except for the hardened type. The chain, BTW was about six links
wide and was the type used on some fork lift trucks.
> Yes, though I would suggest experimenting might be the key word:
>
> 1) If you have a piece of hardened steel chain across a piece of brass
> sheet - I reckon you'd end up with some marks on the brass after you've
> vibrated the chain for a couple or hours drilling holes, though I might be
> wrong...depends on your requirements for the finish of the metal maybe.
> From memory, aircraft gurus don't usually like marks on their panels as
> the lead to cracks.
>
> 2) Does the original concept require the surface to be curved in order to
> hold the chain taught against it, else it will keep being 'lifted up' by
> the flutes of the drill...which would suggest it only good for aircraft
> work, or for our work on occasionally curved surface, like the smokebox.
> (Compare with a tightrope for example - never completely horizontal, it
> always dips to the point where the acrobat is stood...if it were
> completely horizontal, it can carry no vertical, or in our case clamping,
> load).
>
> It does look interesting, but I wonder if the above reasons are why
> it isn't a complace fixture, as it rules it out for most work?
>
> All the best,
>
>
> Rich.
>
> On Tue, 21 May 2013, Terry Lane wrote:
>
>> Can't see why not - might be worth a bit of experimenting.
>>
>> On 20/05/2013 9:10 PM, Clifton wrote:
>>> Hi Jerry and All,
>>>
>>> It's an interesting concept. I wonder if it could be adapted to modeling by
>>> using a smaller chain gauge?
>>>
>>> Clif
>>> ----- Original Message -----
>>> From: "Jerome Kimberlin"<kimberln@xxxxxxxxxxx>
>>> To:<modeleng@xxxxxxxxxxxxx>
>>> Sent: Monday, May 20, 2013 1:04 AM
>>> Subject: [modeleng] Renold jig chain
>>>
>>>
>>>
>>>> I don't suppose these are being made today since CNC can do the job, but
>>>> has anyone ever seen one of these drilling jigs?
>>>> http://www.flightglobal.com/pdfarchive/view/1941/1941%20-%202010.html
>>>>
>>>> Seems like it would be useful for model engineers who like those little
>>>> pimples on tenders, etc.
>>>>
>>>> JerryK
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>>
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