High Torque Type Ball Spline Models LBS, LBST, LBF, LBR and LBH Seal Spline shaft Spline nut Ball Retainer Snap ring Fig.1 Structure of High Torque Type Ball Spline Model LBS Point of Selection Point of Design Mounting Procedure and Maintenance Cross-sectional Characteristics of the Spline Shaft Clearance in the Rotation Direction Accuracy Standards Maximum Manufacturing Length by Accuracy Equivalent factor

High Torque Type Ball Spline Structure and Features No Angular Backlash With the high torque type Ball Spline, a single spline nut provides a preload to eliminate angular backlash and increase the rigidity. Unlike conventional ball splines with circular-arc groove or Gothic-arch groove, the high torque type Ball Spline eliminates the need for twisting two spline nuts to provide a preload, thus allowing compact design to be achieved easily. High Rigidity and Accurate Positioning Since this model has a large contact angle and provides a preload from a single spline nut, the initial displacement...

Applications The high torque type Ball Spline is a reliable straight motion system used in a wide array of applications such as the columns and arms of industrial robot, automatic loader, transfer machine, automatic conveyance system, tire forming machine, spindle of spot welding machine, guide shaft of highspeed automatic coating machine, riveting machine, wire winder, work head of electric discharge machine, spindle drive shaft of grinding machine, speed gears and precision indexing shaft.

High Torque Type Ball Spline Types and Features Types of Spline Nuts Cylindrical Type Ball Spline Model LBS (Medium Load Type) Specication TableA Cylindrical Type Ball Spline Model LBST (Heavy Load Type) Ball Spline The most compact type with a straight cylindrical spline nut. When transmitting a torque, a key is driven into the body. The outer surface of the spline nut is provided with anti-carbonation treatment. Specication TableA A heavy load type that has the same spline nut diameter as model LBS, but has a longer spline nut length. It is optimal for locations where the space is small, a...

Flanged Type Ball Spline Model LBR Specication TableA Based on the heavy load type model LBST, this model has a ange in the central area, making itself optimal for locations under a moment load such as arms of industrial robots. Rectangular Type Ball Spline Model LBH Its rigid rectangular spline nut does not require a housing and can be directly mounted on the machine body. Thus, a compact, highly rigid linear guide system is achieved. Specication TableA

High Torque Type Ball Spline Types of Spline Shafts Precision Solid Spline Shaft (Standard Type) The spline shaft is cold-drawn and its raceway is precision ground. It is used in combination with a spline nut. Ball Spline Special Spline Shaft THK manufactures a spline shaft with thicker ends or thicker middle area through special processing at your request. Hollow Spline Shaft (Type K) A drawn, hollow spline shaft is available for requirements such as piping, wiring, air-vent and weight reduction. Housing Inner-diameter Tolerance When tting the spline nut to the housing, transition t is normally...

Miniature Ball Spline L2 (Overall length with two seals) L (Overall length without two seals) L3 Spline nut dimensions Model No. Outer diameter Note) Models LBS6 and 8 are of end cap type. Keep the end caps of models LBS6 and 8 from impact. THK does not offer a high temperature type of miniature Ball Spline. Model number coding Symbol for clearance Accuracy symbol (*3) in the rotational direction (*2) Number of spline nuts on one shaft (no symbol for one nut) Contamination protection Overall spline shaft length accessory symbol (in mm) (*1)

High Torque Type Ball Spline L Ball Spline Spline shaft outer diameter Basic torque rating Basic load rating (radial) Static permissible moment Spline Nut Spline shaft kg/m g MA.1 indicates the permissible moment value in the axial direction when a single spline nut is used, as shown in the gure above. MA.2 indicates the permissible moment value in the axial direction when two spline nuts in close contact with each other are used, as shown in the gure above. (Single spline nut conguration is not stable in accuracy. We recommend using two spline nuts in close contact with each other.) For details...

Model LBS (Medium Load Type) ℓ0 Spline nut dimensions Model No. Greasing hole Keyway dimensions : indicates model numbers for which high temperature types are available (with metal retainer; service temperature: up to 100 ). (Example) LBS20 A CL+500L H High temperature symbol : indicates model numbers for which felt seal types are available (see A A felt seal cannot be attached to Ball Spline models using metal retainer. Model number coding Symbol for clearance Accuracy symbol in the rotational direction (*3) (*2) Symbol for standard hollow spline shaft (*4) Number of spline nuts Contamination...

High Torque Type Ball Spline Ball Spline Unit: mm Basic torque rating Basic load rating (radial) Static permissible moment MA.1 indicates the permissible moment value in the axial direction when a single spline nut is used, as shown in the gure above. MA.2 indicates the permissible moment value in the axial direction when two spline nuts in close contact with each other are used, as shown in the gure above. (Single LBS-unit conguration is not stable in accuracy. We recommend using a single LBST unit or two LBS units in close contact with each other.) For details on the maximum lengths of ball...

Model LBST (Heavy Load Type) r Spline nut dimensions Model No. Greasing hole Keyway dimensions : indicates model numbers for which high temperature types are available (with metal retainer; service temperature: up to 100 ). (Example) LBST25 A CM+400L H High temperature symbol : indicates model numbers for which felt seal types are available (see A A felt seal cannot be attached to Ball Spline models using metal retainer. Model number coding 2 LBST50 UU CM +800L H K Symbol for clearance Accuracy symbol in the rotational direction (*3) (*2) Symbol for standard hollow spline shaft (*4) Number of...