c) Jacobs No.6 & No.6B also uses this key
d) Jacobs No.14N & 14 (Super Chucks) photo #4 & #5
e) Jacobs No.35B also uses this key
f) Key also equivalent to the ROH68006, for use on ROHM chucks with 5/16" pilot holes.
This chuck key fits a wide range of different manufacturers drill chucks including ROHM, but probably the most common being the Jacobs Chucks previously manufactured at their Sheffield & Hartford (Connecticut) factories.
The photographs form the main part of the description but some dimensional details are as given previously. I only post (at the actual Royal Mail cost) to Postal Codes within the UK including the eBay Depot for Global Delivery.
Technical details : The photographs form the main part of the description but some dimensional details are as given previously.
a) The Spigot Diameter is 5/16" (original Standard), or approx 8.0 mm and weight of the key is approximately 70 gms.
b) This chuck key can't be used on the Jacobs No.32 or No.33 chuck.
c) Don't ruin the teeth of the chuck sleeve by using a worn chuck key.
A pack of 3-off Chuck Keys is available on another of my eBay listings at a discounted price of £5.48 / Key, inc P&P.
See my other Listings for different Chuck Key sizes.