Garage Gazette

TOOLS AND THE SHOP => GENERAL TOOL AND MACHINE DISCUSSION => Topic started by: Papaw on November 10, 2019, 03:47:05 PM

Title: MAC driver
Post by: Papaw on November 10, 2019, 03:47:05 PM
What is this MAC driver for? I remember modifying a flat blade to a similar shape to remove Triumph and BSA clutches in the old days.Total length is 5 1/2 " and tip is 1/2".
Modify message
Title: Re: MAC driver
Post by: GreyOwl on November 10, 2019, 06:14:04 PM
Is the blade thinned any on the tip? If so it could be a staple or tack puller.
Title: Re: MAC driver
Post by: Papaw on November 10, 2019, 06:40:34 PM
Not thinned, and all tack and staple pullers I have seen have the business end angled or curved.
Title: Re: MAC driver
Post by: slip knot on November 10, 2019, 07:10:04 PM
I modded a snappy driver similiarly some years back when working on a carb, foreign maybe?. IIRC the power valve . this may have been a factory MAC job.
Title: Re: MAC driver
Post by: muddy on November 11, 2019, 07:18:28 PM
Have a part number on it?

Sent from the twisted mind of the Mudman

Title: Re: MAC driver
Post by: Papaw on November 11, 2019, 08:12:02 PM
No part number, just MAC  very faint.
Title: Re: MAC driver
Post by: ron350 on November 11, 2019, 08:56:28 PM
 MAC sold several specialty drivers with wooden handles back in the 70’s. Don’t know what mine was designed for but I used it to R&R carb needle and seats.
Title: Re: MAC driver
Post by: fatfillup on November 12, 2019, 02:07:11 AM
MAC sold several specialty drivers with wooden handles back in the 70’s. Don’t know what mine was designed for but I used it to R&R carb needle and seats.

Have had several of these but none like Papaw's
Title: Re: MAC driver
Post by: Papaw on November 13, 2019, 10:06:25 PM
This has gotten me into some deep diving and I have come up with no real answer, but I did find this-
Spanner
Screw Head - Spanner.svg
The spanner[63] or Snake-Eyes (trademarked)[64] screw drive uses two round holes (sometimes two slots - the same driver bits work in both types) opposite each other and is designed to prevent tampering. Other informal names include pig nose, drilled head or twin hole.[65] This type is often seen in elevators and restrooms in the United States, the London Underground in the United Kingdom, some train wagons and the Montreal Metro in Montreal, Quebec, and is seen in all Panama Metro wagons. The driving tool is called a "spanner driver" or "spanner screwdriver"[66] in the US, and a "pin spanner" in the UK.[citation needed] They are also often used for soft spikes on golf shoes. The US military's M17 and M18 service pistols (variants of the SIG Sauer P320) use spanner screws to dissuade disassembly of the handgun beyond normal field maintenance except by the authorized armorer, and they had also been used previously for reinforcement screws on the M14 in order to secure the front locking tab on the magazine well.

The knife and gun manufacturer Microtech uses a variation of this with 3 round holes arranged in a triangle shape. The camera company Leica Camera has used versions of this on rewind knobs and other levers on their rangefinder cameras.
   

From a Wikpedia link. https://en.wikipedia.org/wiki/List_of_screw_drives#Spanner
 (https://en.wikipedia.org/wiki/List_of_screw_drives#Spanner)
Title: Re: MAC driver
Post by: lauver on January 28, 2020, 11:05:14 PM
Ron350,

Your vintage MAC "woody" is a tappet adjuster driver.  I have several like it under various brands.  It was a standard tool back in the days of solid lifters.  The two "ears" on the ends of the blade made it possible to adjust lifters with the engine running.  These drivers went out of favor when hydraulic lifters became the norm (say about 1960ish).

Papaw,

Your vintage MAC "woody" looks like it might have been used to remove bezels from dashboard switches and warning lights.  These tools also went out of use around the 1960s-1970's.  Of course, I could be wrong... it might be a tack puller.
Title: Re: MAC driver
Post by: ron350 on January 29, 2020, 08:35:45 AM
Thanks Lauver.
Title: Re: MAC driver
Post by: fatfillup on January 29, 2020, 08:38:46 AM
Gary, you have been quiet as of late.  Miss your posts, hope all is well with you.  Them twins out of school yet?
Title: Re: MAC driver
Post by: lauver on February 03, 2020, 09:55:42 PM
Fat's,

I'm good, just been busy with year-end and new year projects. 

2019 was a bad year at my house.  One by one, every major appliance in the kitchen had to be replaced.  Then, the heat pump went south.  And now, the septic tank is getting "constipated".

One of the twins graduated early last year.  The other twin has one or two quarters  left, but will graduate in 2020.