Catalog: Ball Screws
Company/Brand: RBC Bearings
ball screw design in Ball Screws by RBC Bearings
precision ground and rolled ball screws rbc precision ball screws offer high ... is achieved in preloaded rbc precision ball screws rbc precision ball screws are ... choose from either precision ground ball screws in either inch or metric sizes ... on the application rbc will supply a ball screw with either internal or external ... ball returns special materials flanges and ... metric fiberglideŽ brand ˇ thin section ball bearings standard cross sections to ... sections ˇ airframe control bearings ball bearing types self-lubricating types ... ˇ ground semiground and unground ball bearings full complement utilizes ... design and burnished races for higher loads ... drive transmissions and gear boxes ˇ ball screws precision ground rolled ball ...

table of contents pages 1 rbc ball screws 4-5 1.1 classification of ball screws 1 ... .2 standard precision ground ball screw availability table 1.3 standard ... precision rolled ball screw availability table 6-7 2.1 reliability ... coefficient 25-27 2 features of rbc ball screws 9 driving torque 9.1 ball screw ... torque during acceleration 27-29 3 rbc ball screw selection procedure flow chart 4 ... accuracy of rbc ball screws 4.1 lead accuracy 4.2 mounting accuracy ... 8 9-11 10 lubrication safety design 10.1 lubrication 10.2 contaminant ... method 10.3.3 dog stop method 29-31 5 screw shaft design 5.1 ball screw ... 5.4.2 dmˇn value 5.5 precautions for screw design 5.5.1 thread runoff adjacent ... rolled series example 32-33 6 nut design 6.1 nut selection 6.1.1 series 6.1.2 ...

5 screw shaft design 5.1 ball screw manufacturing capability rbc s ... are shown below rbc has manufactured ball screws up to 6 in diameter and up to ... in length contact rbc if your required screw shaft dimensions exceed this scope 280 ... 260 240 220 screw threaded length inches manufacturing ... 5.1 production scope rbc manufactures ball screws with specialized requirements ... including hollow ball screws for weight reduction or cooling ... purposes ball screws with specialty platings for corrosive ... combined right and left hand thread ball screws ball screws with specialized ... journals or gear driven rotating nut designs rbc is committed to satisfying all of ...

5.5 precautions for screw design 5.5.1 thread runoff adjacent diameter ... should be given to ensure an economical design for your ball screw application the ... ball thread runoff must extend off one end ... of the screw shaft for the following ball nut models this is to facilitate the ... loading of the ball nut package a internal deflector type b ... 5.5.2 hardness/transition zone rbc s ball screw shaft is induction hardened thus ... zone may be present at each end of the screw thread area depending on the design ... please consider this when designing the effective stroke consult rbc for ... details 6 nut design 6.1 nut selection 6.1.1 series the ... required accuracy delivery size and ball nut style must be considered when ... series for your application 6.1.2 ball re-circulation type select the ball re- ...

flopover deflector nut ball screw external yoke style deflector ˇ ... and large dynamic capacities 6.1.3 design of nuts tight clearance between the ... ball nut and mounting housing should be ... avoided impact to the ball nut can cause breakage or denting of ... the ball return system decide the ball nut type ball return method and flange ... of the nut package removal of the ball nut for assembly purposes should be ...

6.2 precautions for nut design 6.2.1 moment radial loads optimal ... performance of the ball screw is realized when the load distribution ... on steel balls rolling between the screw shaft and nut is as even as possible ... loading on a small portion of the steel balls thereby affecting operational ... as much as possible consult rbc for design options to enhance life on moment or ... loaded applications 6.2.2 rotating nut designs proper consideration of the bearing ... support for rotating nut designs is important consult rbc for this ... stiffness poor system stiffness of ball screws results in loss of positioning ... accuracy 7.1.1 axial stiffness of the ball screw system axial elastic displacement ... and stiffness of the ball screw system is calculated as follows fa q ...

motor lbins2 moment of inertia of the screw shaft lbins2 moving weight lbs table ... 386.4 in/s2 10 lubrication and safety design 10.1 lubrication rbc s standard grease ... for highly loaded gears and actuator screw mechanisms with a viscosity of 3.1 cst ... specification can be used in most ball screw applications rbc s standard oil is an ... matter or water if allowed to enter the ball screw may increase friction and cause ...

12 rbc precision ground ball screws dimensional tables rbc s standard ... series for precision ground ball screws covers a wide range of ball screw ... a metric lead series with an external ball return and an integral flange series ... and double nut offerings based on screw major diameter two standard flange ... is an inch lead series with an external ball return and integral flange series ... is an inch lead series with an external ball return and optional flange this ... shown rb series is an inch lead series designed for high speed applications 2 and 4 ... fine inch lead series with an internal ball return this is available preloaded and ... a metric lead series with an external ball return and an optional flange 3 ...

14 quickturnŽ ball screw repair service rbc has repaired ball ... screws on the equipment of virtually every ... especially the southeast quickturnŽ is designed to allow us to respond quickly to the ... 800.62.renew for details quickturnŽ ball screw repair planning guide repair type ... with new components replace nut replace screw regrind screw new screw regrind nut ... regrind nut regrind screw new nut complete assembly replaced 2 1 ... weeks weeks weeks weeks warranty all ball screws are repaired by highly skilled ... guarantee all workmanship on repaired ball screws for one year 64 ...

manufacturing dimensions from a nominal design specified value torque force applied ... the axial distance traversed by the screw or nut in one direction turns the ... number of revolutions that the ball nut track makes about the screw axis ... vee-thread threaded portion of ball nut or screw shaft variation rate of ... condition velocity refers to ball velocity within the ball track wipers ... protecting elements included in the ball nut to exclude foreign material and ... in lead error for one revolution of the ball nut 16 conversion factors a length 1m ...