Gear box sprocket retainer

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Gear box sprocket retainer

Postby Harry44 » Thu Apr 25, 2019 5:42 pm

Hi, The little screw that holds the gear box sprocket retaining plate has been butchered. Nothing in my collection of nuts and bolts seems to fit.

Its a 57 18s with an AMC box

Can anyone tell me what thread it is please ?
si is does non opportunus vos postulo a maior pango

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Re: Gear box sprocket retainer

Postby Rob Harknett » Thu Apr 25, 2019 6:41 pm

I assume you mean the round head screw that holds what looks like a locking washer. pt. no. 000450 3/8" x 2BA.
Now I repeat myself now for the 3rd time this week, Most standard fittings have been used since the prewar era. Post cira 1952 parts lists do not give some many dimensions as the pre 52 parts lists did. So check your pt. no. here http://archives.jampot.dk/book/Spares_l ... ements.pdf
If the part was used prior to circa 1955 you will see it listed, in the description you will also see the dimensions. You may not spot if the pt. no. in question was used years ago. 100's of parts were. Over a 1,000 of these parts started with a 6 digit number, prefixed with at lest 3 zero's 000001 to about 001100. So they are sure to be listed in the above book. A lot quicker to DIY than ask here and wait for answers. See with your own eyes what is correct. To convert to the old part number, delete all the prefix zero's and replace with STD ( eg. STD1 .... STD1100 ) Always use the new pt. no. when ordering. Club spares stock the screw you want for 11p. inc VAT. They also put the size. So somewhere else where you can discover a fitting dimension of a part / fitting if its in stock.

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Re: Gear box sprocket retainer

Postby Harry44 » Thu Apr 25, 2019 8:55 pm

Thanks Rob, I did look in the club spares but could not find the screw, only the sprocket, out of stock, and the lock washer.
si is does non opportunus vos postulo a maior pango

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Re: Gear box sprocket retainer

Postby Rob Harknett » Thu Apr 25, 2019 11:33 pm

Harry44 wrote:Thanks Rob, I did look in the club spares but could not find the screw, only the sprocket, out of stock, and the lock washer.

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Re: Gear box sprocket retainer

Postby ajscomboman » Fri Apr 26, 2019 3:34 pm

Harry44 wrote:Thanks Rob, I did look in the club spares but could not find the screw, only the sprocket, out of stock, and the lock washer.



Out of stock, we've got over 4000 of them at Kettering! I have just updated the system to place the screw in the gearbox section as well as the chaincase section as it doubles up for 2 different fittings.

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Re: Gear box sprocket retainer

Postby clive » Fri Apr 26, 2019 3:58 pm

ajscomboman wrote:
Harry44 wrote:Thanks Rob, I did look in the club spares but could not find the screw, only the sprocket, out of stock, and the lock washer.



Out of stock, we've got over 4000 of them at Kettering! I have just updated the system to place the screw in the gearbox section as well as the chaincase section as it doubles up for 2 different fittings.


4000 sprockets surely not? If so we will have cornered the market. :roll:
More seriously isn't this why our spares are part number driven. Look up the part number in your spares list, which we have all got haven't we if not we can go to the archives, then check the part number on the spares site. If you are adding uses for the 2 BA screw 000450 then include the screw for retaining the inspection cover for the AMC gearbox.
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Re: Gear box sprocket retainer

Postby Harry44 » Fri Apr 26, 2019 8:33 pm

It say the sprockets are in stock now but yesterday it said no stock ho hum
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Re: Gear box sprocket retainer

Postby Rob Harknett » Fri Apr 26, 2019 9:36 pm

Thought we were talking about the 3/8" 2BA screw pt. no. 000450 that secures the gearbox sprocket lock washer. It may well have been used in other areas of a bike since the prewar era.

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Re: Gear box sprocket retainer

Postby ajscomboman » Sat Apr 27, 2019 8:12 am

Hang on we started talking about the screw, hence the 4000 plus number in stock. As for sprockets they've been in stock for a long time.

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Re: Gear box sprocket retainer

Postby SPRIDDLER » Sat Apr 27, 2019 8:37 am

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