[modeleng] Re: Renold jig chain
- From: Jesse <fernj1@xxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Wed, 22 May 2013 16:08:10 -0500
Look Kangaroo lover, but it seems to me that the hardened chain would
dull most any drill including solid carbide.
Jesse
> 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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>>>>>>
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>>>>>
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>
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