cats and spiders...different animals and species ?

M

matchman

Guest
Well...
whats the difference between a cat head to hold a barrel on a lathe and a spider ???
Thanks
Adam
 
As I see it, a spider typically is in place of the chuck or on the back of the spindle and will have a single row of bolts/fingers. A cat head may be held in the chuck or may be held in a steady rest and will have at least two rows of bolts/fingers.
Greg
 
Actually, we have always referred to these as "spiders".
 

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The manufacturer states it best.

# The Royal Chuck Stop provides a simple, consistent method for locating short parts in a 3-jaw lathe chuck.
# Captive, web-shaped design eliminates the danger of using spacers or parallels that could come loose and be thrown from a spinning chuck. Three strong magnets further secure the stop to the chuck face.
# Stop allows short parts to project past the chuck jaws, providing clearance for facing operations.
# Setup time is greatly reduced - no need to bore soft jaws.
# The Royal Chuck Stop is very accurate - front and back locating surfaces are parallel within ± 0.0004 inch.
 
SET said:
The manufacturer states it best.

# The Royal Chuck Stop provides a simple, consistent method for locating short parts in a 3-jaw lathe chuck.
# Captive, web-shaped design eliminates the danger of using spacers or parallels that could come loose and be thrown from a spinning chuck. Three strong magnets further secure the stop to the chuck face.
# Stop allows short parts to project past the chuck jaws, providing clearance for facing operations.
# Setup time is greatly reduced - no need to bore soft jaws.
# The Royal Chuck Stop is very accurate - front and back locating surfaces are parallel within ± 0.0004 inch.
Click to expand...

I dont get it, how do you get the part past the webbing to the chuck jaws?............Don
 
The jaws protrude through the webbing. It comes in handy for those short parts that need to be turned. The photos are self explanatory.
 

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Last edited:
SET said:
The jaws protrude through the webbing. It comes in handy for those short parts that need to be turned. The photos are self explanatory.
Click to expand...

Ah, I see now.

Dont have a need for it too often, when I do I use the spacers or parallels with shim stock that I remove after tightening the jaws, thereby eliminating the flying spacers or parallels...............Don
 
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