BURNERD MULTISIZE CHUCKS AND COLLETS
THESE BURNERD CHUCKS AND COLLETS WERE A TOP OF THE RANGE WORK HOLDING SYSTEM THAT OFFERED PRECISION CENTREING OF ROUND, SQUARE AND HEXAGONAL MATERIAL AND ACCORDING TO THEIR PUBLICITY, GAVE ADVANTAGES OVER THE NORMAL TYPE OF COLLET.
I HAVE NEVER SEEN THESE CHUCKS AND COLLETS FEATURED IN ANY MODEL ENGINEERING MAGAZINE, PROBABLY BECAUSE THEY ARE, EVEN SECOND HAND, QUITE EXPENSIVE TO BUY, BUT BARGAINS CAN ALWAYS BE FOUND!
HOWEVER THE TYPES THAT WE SMALL MACHINE USERS WILL EASILY FIND ARE NOT DESIGNED TO GRIP WORK WITH A ROUGH SURFACE FINISH AND GRIPPING SHORT LENGTHS IN THE FRONT OF THE JAWS COULD LEAD TO DAMAGE TO THE FRONT OF THE JAWS.
BURNERD DID SUPPLY COLLETS TO GRIP ROUGH BARS BUT I`VE NEVER SEEN ANY OF THESE OFFERED FOR SALE SECOND HAND.
I HAVE NEVER SEEN THESE CHUCKS AND COLLETS FEATURED IN ANY MODEL ENGINEERING MAGAZINE, PROBABLY BECAUSE THEY ARE, EVEN SECOND HAND, QUITE EXPENSIVE TO BUY, BUT BARGAINS CAN ALWAYS BE FOUND!
HOWEVER THE TYPES THAT WE SMALL MACHINE USERS WILL EASILY FIND ARE NOT DESIGNED TO GRIP WORK WITH A ROUGH SURFACE FINISH AND GRIPPING SHORT LENGTHS IN THE FRONT OF THE JAWS COULD LEAD TO DAMAGE TO THE FRONT OF THE JAWS.
BURNERD DID SUPPLY COLLETS TO GRIP ROUGH BARS BUT I`VE NEVER SEEN ANY OF THESE OFFERED FOR SALE SECOND HAND.
A FEW YEARS AGO I BECAME FASCINATED BY THE ENGINEERING PRINCIPLE OF THE BURNERD MULTISIZE COLLET SYSTEM AND AMASSED QUITE A COLLECTION OF SETS OF BURNERD CHUCKS AND COLLETS. THEY WERE JUST LEFT STORED IN MY CONTAINER IN THE UK UNTIL I DECIDED TO END MY LEASE OF THE CONTAINER AND THE BEST OF THE CHUCKS AND COLLETS WERE BROUGHT TO NORWAY, THE REST I HAD TO SCRAP DUE TO THE SHORT TIME THAT I HAD LEFT MYSELF TO CLEAR THE CONTAINER! I WOULD HAVE GIVEN THEM AWAY BUT YOU WILL FIND THAT IF YOU EVER HAVE TO GIVE THINGS AWAY IT`S NOT SO EASY, ESPECIALLY AT SHORT NOTICE!
ABOVE I`VE ADDED THREE PAGES FROM THE BURNERD MULTISIZE COLLET BROCHURE AS SUPPLIED BY TONY OF LATHES,CO.UK. THIS IS A VERY USEFUL PUBLICATION FOR ANYONE INTERESTED IN KNOWING ALL ABOUT THE SUBJECT. WITHIN THEM, BURNERD EXTOLL THE VIRTUES OF THEIR PRECISION PRODUCT AND HOW THEY WORK.
THERE ARE A LARGE RANGE OF HOLDERS AND COLLETS WHICH CAN ENCOMPASS DIAMETERS FROM 1/16" UP TO 2 1/2". THE CHUCKS ARE RANGED FROM THE KC7 (1/16" TO 3/4") KC10 (1/16" TO 1") KC12 (1/16" TO 1 !/4") & KC15 ( 1/16" TO 1 1/2") AFTER THIS THE CHUCKS BECOME TOO LARGE FOR OUR SMALLER LATHES.
THE MAIN ADVANTAGES OF THESE COLLETS IS THAT EACH ONE HAS A RANGE OF 1/8" SO THAT EACH SET OF COLLETS WILL SEAMLESSLY HOLD ANY SIZE WITHIN IT`S RANGE WHETHER IMPERIAL OR METRIC.
THERE ARE A LARGE RANGE OF HOLDERS AND COLLETS WHICH CAN ENCOMPASS DIAMETERS FROM 1/16" UP TO 2 1/2". THE CHUCKS ARE RANGED FROM THE KC7 (1/16" TO 3/4") KC10 (1/16" TO 1") KC12 (1/16" TO 1 !/4") & KC15 ( 1/16" TO 1 1/2") AFTER THIS THE CHUCKS BECOME TOO LARGE FOR OUR SMALLER LATHES.
THE MAIN ADVANTAGES OF THESE COLLETS IS THAT EACH ONE HAS A RANGE OF 1/8" SO THAT EACH SET OF COLLETS WILL SEAMLESSLY HOLD ANY SIZE WITHIN IT`S RANGE WHETHER IMPERIAL OR METRIC.
FINDING CHUCKS AND FITTING THEM TO YOUR LATHE
THE BEST PLACE TO FIND THE CHUCKS AND COLLETS IS ON EBAY. BURNERD SOLD THESE COLLETS ALL AROUND THE WORLD AND I`VE EVEN BOUGHT SOME FROM AUSTRALIA!
ABOVE LEFT A PAGE SHOWING THE FLANGED CHUCKS THAT CAN EASILY BE ATTACHED TO A SUITABLE BACKPLATE FOR YOUR LATHE. SOME CHUCKS ARE OFFERED WITH DIRECT ATTACHMENT FOR THE SPINDLE BUT THESE ARE MOSTLY FOR AMERICAN DERIVED LATHE SPINDLE NOSES.
ABOVE A KC15 CHUCK THAT TAKES EC COLLETS. THIS WAS RATHER RUSTY AND REQUIRED HEAVY WIRE BRUSHING TO REMOVE THIS CORROSION. THE INSIDE TAPER NEEDS LIGHT DE RUSTING AND I WILL DO THIS WHEN THE CHUCK IS FITTED TO THE BACKPLATE. THE CENTRE IMAGE SHOWS THE LARGE 6 INCH FLANGE AND ON THE RIGHT MY TRUSTY BOXFORD VSL IS HACKING OFF THE NECESSARY MATERIAL FROM THE BACKPLATE SO THAT THE CHUCK WILL FIT ON IT SNUGLY.
IT`S VERY DIFFICULT TO FIND READY MADE LOO BACKPLATES IN EUROPE SO THAT I HAD TO USE A HARRISON CATCH PLATE AS A BACKPLATE. THIS IS DESIGNED TO BE IN BALANCE BUT IF THERE IS ANY PROBLEM WITH THE BALANCE I WILL DRILL LIGHTENING HOLES IN IT TO CORRECT THIS.
IT`S VERY DIFFICULT TO FIND READY MADE LOO BACKPLATES IN EUROPE SO THAT I HAD TO USE A HARRISON CATCH PLATE AS A BACKPLATE. THIS IS DESIGNED TO BE IN BALANCE BUT IF THERE IS ANY PROBLEM WITH THE BALANCE I WILL DRILL LIGHTENING HOLES IN IT TO CORRECT THIS.
LEVER OPERATED CHUCKS
THESE CHUCKS ARE USED FOR REPETION WORK AND THE M.O. IS THAT THE CHUCK CAN BE OPENED WHILE THE LATHE IS RUNNING AND THE WORK REMOVED AND A NEW PIECE INSERTED.
COLLET INFORMATION
THE ABOVE LEFT HAND PAGE M TYPE COLLET ARE FOR THE SMALLEST CHUCK WITH A CAPACITY OF UP TO 3/4".
THE NEXT LEFT IS FOR THE MA TYPE COLLET FOR A CHUCK WITH THE CAPACITY OF UP TO 1"
THE THIRD FROM THE LEFT SHOWS THE E TYPE FOR A CHUCK WITH A CAPACITY OF 3/4".
THE RIGHT HAND PAGE SHOWS THE EA TYPE OF COLLETS FOR A CHUCK WITH A CAPACITY OF 1"
NOTE THAT THE E TYPE OF COLLET WAS AN UPGRADE OF THE M TYPE BUT THESE CAN BOTH BE USED IN THE SAME CHUCK
THE NEXT LEFT IS FOR THE MA TYPE COLLET FOR A CHUCK WITH THE CAPACITY OF UP TO 1"
THE THIRD FROM THE LEFT SHOWS THE E TYPE FOR A CHUCK WITH A CAPACITY OF 3/4".
THE RIGHT HAND PAGE SHOWS THE EA TYPE OF COLLETS FOR A CHUCK WITH A CAPACITY OF 1"
NOTE THAT THE E TYPE OF COLLET WAS AN UPGRADE OF THE M TYPE BUT THESE CAN BOTH BE USED IN THE SAME CHUCK
CONTINUING