[modeleng] Re: Renold jig chain
- From: Terry Lane <tel.47@xxxxxxxxxxx>
- To: modeleng@xxxxxxxxxxxxx
- Date: Thu, 23 May 2013 07:20:16 +1000
Not at all Possum Muncher, you drill through the empty spaces, not the
rollers!
On 23/05/2013 7:08 AM, Jesse wrote:
> 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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