MicroAire Reciprocating Saw

[Michael GilliganParticipant @michaelgilligan61133]

I have acquired what would appear to be an old 7400-200 saw … but sadly it has had amputation, rendering it currently useless

What should be a two-jaw ‘collet’ to hold the blade has been neatly reduced to a mere stub

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Does anyone, by any remote chance, have an exploded diagram or any other useful information ?

… fitting a prosthetic blade-clamp to a high speed saw could be tricky.

MichaelG.

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Ref: __ http://www.wemed1.com/downloads/dl/file/id/5570/product/7299/specs_for_or_ma_7000series.pdf

Edited By Michael Gilligan on 19/04/2022 09:00:19

[Michael GilliganParticipant @michaelgilligan61133]

… but not quite

[David George 1Participant @davidgeorge1]

That looks like a saw used in amputations in operating theaters. I would have thought that the back of the chuck would have a spanner to stop it rotating and a C spanner to loosen or tighten the collet. I used to make wax pattern dies for bone cutters tooth pliers etc which were cast in Sheffield. I have a couple of spare hip joints which I also worked on.

David

[Ady1Participant @ady1]

There's a few on ebay who start at a grand a pop and have a medical look about them

Are you changing your forum name to hannibal ?

[Michael GilliganParticipant @michaelgilligan61133]

Here, from that brochure, is what the business-end should look like:

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MichaelG.

Edited By Michael Gilligan on 19/04/2022 10:56:00

[Ady1Participant @ady1]

Searched everything I have and found a single reference in the 1957 0927 issue of The Engineer

"Also in the laboratory are a ' Microaire " unit, and a vibrascope" etc

I would guess that medical journals will give you more joy than engineering publications

[pgk pgkParticipant @pgkpgk17461]

It is a surgical product and I recall looking at refurbished variants in my time. I'd expect the company to still be trading,if not then whoever bought them out, and likely quite amenable to being contacted. If memory serves then veterinary instrumentation sold some units 20yrs ago and might be helpful. Our orthopaedic air tools were run from a large compressed Air cylinder rather than a compressor.

Pgk

[Michael GilliganParticipant @michaelgilligan61133]

Posted by pgk pgk on 19/04/2022 11:21:24:

It is a surgical product and I recall looking at refurbished variants in my time. I'd expect the company to still be trading,if not then whoever bought them out, and likely quite amenable to being contacted. If memory serves then veterinary instrumentation sold some units 20yrs ago and might be helpful. Our orthopaedic air tools were run from a large compressed Air cylinder rather than a compressor.

Pgk

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Thanks, pgk

Yes, I am [and was] aware that it is a surgical product

For clarity … when I used the phrase “what would appear to be” it was because I realised that it was currently incapable of performing the job.

Yes, the company is still trading … and now offering battery-powered versions.

But I have been unable to find any engineering/servicing information about the products.

I was rather hoping that you might have had personal experience of using them.

May I just check … Is ‘veterinary instrumentation’ a company name ?

MichaelG.
 

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https://www.microaire.com/medical-professionals-2021/

https://www.microaire.com/wp-content/uploads/2021/08/IM-7105-Rev-E.pdf

… from which:

Edited By Michael Gilligan on 19/04/2022 15:22:01

[peak4Participant @peak4]

Posted by Michael Gilligan on 19/04/2022 15:06:53:

Thanks, pgk

…………………………..

May I just check … Is ‘veterinary instrumentation’ a company name ?

MichaelG.

Yes it would appear to be, and not too far away; LINK
https://veterinary-instrumentation.co.uk/catalog/surgical-power-equipment/air-powered-tools-and-equipment

Bill

[Michael GilliganParticipant @michaelgilligan61133]

Thanks for that, Bill

MichaelG.

[pgk pgkParticipant @pgkpgk17461]

Posted by Michael Gilligan on 19/04/2022 15:06:53:

But I have been unable to find any engineering/servicing information about the products.

I was rather hoping that you might have had personal experience of using them.

I used a small orthopaedic air drill reasonably often for internal fixation cases. The most such devices would get in the way of service from staff was a drop of sterile oil up the air inlet. Reciprocating and oscillating saws really only get used in more fancy work – such as wedge resections where bones have healed at an angle (neglect or poor fixation) or in joint replacement efforts. That's getting into the province of specialist centres. Some of the tools have centrifugal clutches. On the few occasions I got into fancier work such as spinal decompressions where owners couldn't afford referral I found that the recommended bur sizes skipped/jumped in my hands – scary – so I preferred to use a high speed dental drill and smaller bur and take my time 'painting' the bone away with sterile flood coolant. Some colleagues were using ordinary cordless drills with a sterile shroud but such items are a bit clumsy for anything but a large dog.
The ortho drill never needed servicing in my years owing it and I was the main user. Dental handpieces were a different matter – staff have a habit of dropping things they don't own themselves, and the unit was used for all sorts of stuff from genuine dental work to cutting rings off or shortening overgrown rodent/rabbit teeth or beaks. It was more practical to own stuff from the cheaper end choice (and dental handpieces can be cheap to silly expensive) and just replace instead of paying for repair.

pgk

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