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Glossary |
Arbor tube
Metal or plastic tube inside ball screw nut to prevent release of balls
Ball screw
A screw/nut drive system that utilises a number of small balls
Backlash
The amount of free movement between a screw and nut
Carry
A type of ball screw
Carry speed line
Hi helix ball screw
Efficiency (%)
The ratio of work output to work input as a percentage see table efficiency (practical)
Friction
Resistance to motion between nut and spindle/screw
Hi Helix
Multi start thread with high pitch
Lead
The distance a screw advances in one revolution/turn
Lead screw
Plastics and bronze nuts running on a rolled spindle/screw with small and hi-helix pitch
Pitch
The pitch of a screw is the thread distance from one crest to the next measured axially
Rondo
Round thread lead screw
Root diameter
Diameter of spindle/screw at the bottom of thread
Speedy
Hi helix lead screw
Starts
A term that states the number of independent threads on a screw
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