Jarvis 303 Tapping head collet sizing

I have a Jacobs 440-J10 with two Rubberflex collets, I wonder if they're the same as for the J5. Not for sale, except with the chuck, and you already have one of those. Anyway if it helps, here are the specs on the two collets I have: No. J441--capacity, #10 to 1/2" No. J440--capacity, 5/16"-5/8" Each collet has six jaws, about 1/8" thick, set in rubber--5/8" long, and a 20 degree cone angle. Largest diameter across the points is 1 3/16".

Ken Grunke SW Wisconsin

Thanks for the reply. From your description they seem like the right size. How does your chuck attach? This one is retained by a pin the way it appears although I have not taken it off the tapping head. How dear is the chuck and collets to you? Maybe we could work out a trade or cash if need be. Contact me off list at speterooooooooatoooooooowctaooooooodotooooooooonet take out the "o"s