Home |
Search |
Today's Posts |
|
Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
|
|||
|
|||
5 C COLLET BLOCK CHUCKS
What are 5c collet block chucks and how are they used with a lathe?
|
#2
|
|||
|
|||
The one I have is simply a holder for the collets that fits a Jarno
taper [0.60"/ft]. I am machining an adaptor to fit my 1-1/2" 8 TPI headstock. Bugs |
#3
|
|||
|
|||
Are they called block chucks on a lathe??
On lathes, I hear them referred to as "noses" or "closers" (snap handle or spin). At least in my semi-exhaustive hunt for a used lathe w/collet closer! ---------------------------- Mr. P.V.'d formerly Droll Troll "Bugs" wrote in message oups.com... The one I have is simply a holder for the collets that fits a Jarno taper [0.60"/ft]. I am machining an adaptor to fit my 1-1/2" 8 TPI headstock. Bugs |
#4
|
|||
|
|||
after you machine the adaptor and fit it to the 5c collet block, would
you have an effective poor mans 5C collet chuck? |
#5
|
|||
|
|||
The collet blocks are typically used with milling machines or grinders.
The workpiece is held in them in the collet, and the entire block (square or hex) can then be clamped or held for machining, and rotated for subsequent steps. Collet chucks are another animal. John Martin |
#6
|
|||
|
|||
|
#7
|
|||
|
|||
So once the round type is centered in the 4-jaw chuck, can the block
be used as a collet chuck? |
#8
|
|||
|
|||
|
#9
|
|||
|
|||
On Sat, 02 Apr 2005 20:41:15 GMT, machineman
wrote: wrote: What are 5c collet block chucks and how are they used with a lathe? There are several different styles, but for the lathe you would want the round type. They are normally held in a 4jaw chuck or in a 3jaw with soft jaws that you would bore to fit. Some have a screw on the front side to release the collet or a nut on the back that has to be accessed from the back of the lathe throught the spindle, or taken out of the chuck to get at. I have seen set-ups where the part is held in the collet chuck off center and then put in the lathe to machine an eccentric. We used them to hold small parts or round bar that would be a pain in a larger chuck and allowed us to dial them in perfect in the 4jaw. Dont forget the collet blocks that slip into the KDK/Aloris etc quick change holders. With such a block, you can mill, drill, cross drill, slit, drill hole patterns and offset holes, while on the lathe I made one just to fit my lathe. Its been invaluable. Gunner Rule #35 "That which does not kill you, has made a huge tactical error" |
#10
|
|||
|
|||
On 2 Apr 2005 04:58:26 -0800, wrote:
What are 5c collet block chucks and how are they used with a lathe? ======================== What I call collet block chucks are also called tumble blocks or tumble fixtures. See http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3 http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3 Enco frequently has these on sale as a set. You can use these on a lathe with a faceplate to machine squares and hexes, although more generally used with a mill. You can also use as a cheap collet closer, but see below for better solution. For lathe use an item that can provide a cheap collet closer is a vertical collet vise. You can bolt this onto a face plate. See http://www.use-enco.com/CGI/INSRIT?P...&PARTPG=INLMK3 These also go on sale from time to time with a set of collets [X 16ths] Many other suppliers have the same items. Tip on setting this up is to chuck up a 1/2 inch dowel pin about 4 inches long in the tail stock and chuck up the other end of the dowel with the vertical collet vise to locate it on the face plate. Close enough for most work, and it will be close enough to use your limited range (+/1 15 thou) test indicator when you need the best accuracy possible. Drawbacks are chuck overhang and inability to feed stock through the collet/spindle because the fixture is closed on the bottom. Collet chuck is an alternative but costs 4 or 5 X. Hope this helps. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
FS: New Rohm Drill Chucks | Metalworking | |||
What "seals" a concrete block and stucco house from rain? | Home Repair | |||
Rain seeping inside through concrete block wall above grade (Warning: LONG explanation) | Home Repair | |||
Router collet sizes | UK diy | |||
Black and Decker chucks | Woodworking |