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Discussion Starter · #1 ·
Hi,

Could someone please tell me what size screwdriver I need for the two screws to change out my battery?

I can't seem to find anything that will fit locally.

Thank you very much.

Dave
 

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Ace Is The Place

I use a 1.4mm screwdriver that is only available in sets of precision screwdrivers. It is the same size as used on many eye glasses. Ace Hardware stores in your area should have them. You may need to sharpen the tip to fit the screws on your Accutron.
 

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You may need to sharpen the tip to fit the screws on your Accutron.
That's what I did with one in a set I had. Works great. I leave the screws slightly loose. Next time the watch needs a battery change all you need do is insert a pointed tool in the little hole in the one end of the battery strap and move the strap away. With the case back on, the strap will not move out of position.
 

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That's what I did with one in a set I had. Works great. I leave the screws slightly loose. Next time the watch needs a battery change all you need do is insert a pointed tool in the little hole in the one end of the battery strap and move the strap away. With the case back on, the strap will not move out of position.
All the above is good info and in addition, you really ought to make use of a x3 or so loop to make sure the screwdriver hits the screws, not some other place inside the case... You may be "super" BUT one slight shaky movement can spoil your day at considerable cost to your budget.

In addition to Ace, most pharmacies or markets that have the selection of reading glasses available for purchase should have the little screwdriver along with an assortment of screws used on the glasses frames in a kit at a reasonable cost....

Oh by the way, I spent time back in the early 60's over at Wheeler (AFSS), lived up at 1747 Uuku St. in Wahiawa... Good memory's while at home, not quite as good while on "field trips" with the boss...
 

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Discussion Starter · #5 ·
Thanks for the info on the screwdriver.

My mother in law was talking about Hawaii in the 1960's over the weekend. It's definately different than when you were here Ralph.

Thanks,
Dave
 

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I have tried using a 1.0mm, 1.2mm, and 1.4mm precision screwdriver but none of them will fit into the slots for the battery strap screw. I have printed instructions which came with the 218 which says to loosen the Coil Form Screw lightly (no more than 1/4 turn) then to loosen the Coil Strap screw and swing the strap out to replace the battery. I have a new Energizer 344 battery to replace the original battery.
What size screwdriver should I be using? If it is one which I have the blade seems to be too thick to go in the slot.
What screwdriver would you recommend to loosen the screws.
 

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Lacking a watchmakers set of screwdrivers, I have used fine sandpaper to make the width of a small screwdriver thinner so it will fit the slot. On all my Accutron movements that have screws holding down the battery strap I no longer tighten them after installing the battery. I leave the screws just loose enough to allow the strap to swing out and back. A fine point toothpick is great for placing in the small hole on the strap to move it. Because of the shape of the strap and thickness of the battery, the strap will not come out from under the screw while wearing the watch.
 

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I can't find a size marked on the screwdriver I use but I bought a set of cheap precision screwdrivers at Harbor Freight and one of them works great. Like Oliver, I don't tighten the screws, I back them out until I can take out the battery and then it is easy to use about anything on the small hole.
 

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I can't find a size marked on the screwdriver I use but I bought a set of cheap precision screwdrivers at Harbor Freight and one of them works great. Like Oliver, I don't tighten the screws, I back them out until I can take out the battery and then it is easy to use about anything on the small hole.
Do you remember which set of screwdrivers (product number, quantity or description) you got at Harbor Freight? Have one nearby and if the screwdriver fits I can go to step 2, changing the battrery.
 

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My set of small screwdrivers goes from .050-.250" and I have probably used the .060"or.080" to loosen the screws. Always worked well.
 

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Tagging onto an old thread, last night I ventured inside a 218 for the first time to change the battery, my screwdriver fitted fine, but alast the sprung steel strap catapulted the screw across the table seemingly into a black hole as I still can't find it. I tried two watchmakers this morning thinking it would be an easy task to pick up another screw of the right size, but alas neither had the right size. So, can anyone please advise, is this a bespoke screw size that I need to get from an accutron specialist, or is there a size I can quote to a watchmaker supplies house ? I'd be grateful for any assistance. The second guy I spoke to this morning told me in future to put a blob of blue tak across the strap before undoing the screw, that will stop it firing the screw off into space, or maybe just follow the helpful instructions in this thread about only loosening the screw a quarter turn.
 

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Diode, welcome to the forum (I see it's your 1st post). Sorry to read about your unfortunate saga with a launched screw. Placing a piece of tape across the latch isn't necessary, as the proper method would be; as you noted, to simply loosen the screw only enough to release the strap. I generally loosen the top screw a turn as well. I'm surprised the screw launched like that though. Was the battery you removed the proper size? I've seen taller, incorrect batteries used which necessitate bending the strap, and creating the "catapult" you mentioned. As far as screws, I'll check if I have any spares.

Eric
 

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The watch had an accucell on board, but looking at photos of other 218 movements online I think that the screw was not the original, it had a much smaller head than seems to be the norm. There is a threaded insert in the brass plate that the screw goes into which is closed at the bottom, so I'm thinking it may well be a bespoke item. I work quite close to Clerkenwell, the watchmaking hub of London, so will pop along there sometime this week and see if any of the shops there can supply something suitable, if so, I'll probably buy a dozen just in case it happens again
 

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Many Thanks for that, the service manual is just the job. Good to know about the eBay parts, but at $4 + $7 postage I think I will try Clerkenwell first, or get on my hands & knees and have another hunt around for the escapee.
 
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