[modeleng] Re: Renold jig chain
- From: Terry Lane <tel.47@xxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Thu, 23 May 2013 07:03:00 +1000
Pay attention Unk! The chain is used as a spacing jig on curved surfaces
for laying out rivet holes or whatever!
On 23/05/2013 6:55 AM, Jesse wrote:
> 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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