TBI Precision Screw Spline RBLY Series

NegotiableUpdate on 04/19

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Nature of the Manufacturer: Producers

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Overview

Advantages and features: The TBI precision screw spline RBLY series is a combination of screw and spline. The rolling friction between the screw shaft and nut of the TBI ball screw is achieved through ball rolling, reducing the driving torque to less than 1/3 compared to previous sliding screws

Product Details

Advantages and Characteristics:The TBI precision screw spline RBLY series is a combination of screw and spline. The rolling friction between the screw shaft and nut of the TBI ball screw is achieved through ball rolling, reducing the driving torque to less than 1/3 compared to previous sliding screws. A spline shaft is named after its appearance and has longitudinal key slots on the outer surface of the shaft. The rotating parts fitted on the shaft also have corresponding key slots, which can maintain synchronous rotation with the shaft.

Structure and Application of TBI Screw Rod
TBI precision screw consists of a screw, nut, steel ball, pre press plate, reverser, and dust collector. Its function is to convert rotational motion into linear motion, which is a further extension and development of the Ekm screw. The significance of this development is to transform bearings from rolling motion to sliding motion. Due to its low frictional resistance, TBI screws are widely used in various industrial equipment and precision instruments. TBI ball screw bearings provide a wide range of standardized products to meet various applications. Widely used in machine tools, the circulation methods of ball bearings include circulation guide tube type, circulation device type, and end cap type.

Definition of TBI screw spline model

Introduction to TBI spline shaft

1. Function: TBI spline shaft is a type of mechanical transmission that transmits mechanical torque, just like flat keys, half circle keys, and oblique keys

2. Structure: There are longitudinal key slots on the outer surface of the TBI ball spline shaft, and the rotating parts fitted on the shaft also have corresponding key slots, which can maintain synchronous rotation with the shaft. While rotating, some can also slide longitudinally on the shaft, such as gearbox shift gears.

3. Application example: TBI ball spline in brakes and steering mechanisms. Another type is a telescopic shaft composed of inner and outer tubes, with the outer tube having inner teeth and the inner tube having outer teeth, which are fitted together. When in use, it can expand and contract in the length direction while transmitting rotational torque.

4. Material: 40Cr

5. Heat treatment. Quenched surface hardness HRC45-50.

Advantages of TBI splines

Zero clearance in spline rotation direction/high positioning accuracy

The joint angle between the spline outer ring and the steel ball is 45 degrees, designed with DF (face-to-face combination) bearings. It can absorb assembly differences and automatically adjust concentricity, and can withstand large axial loads and high-precision assembly. See the figure below

DF (Face to Face Combination) Design

Structure and specialties

TBI Precision Screw Spline RBLY is a special bearing sleeve installed on the outer diameter of the screw cap to make it operate. By rotating or stopping the nut, it can move in two modes (rotation and spiral) with only one shaft. The rotary ball spline is equipped with a special bearing sleeve on the outer diameter of the spline outer cylinder to make it operate. By rotating or stopping the outer cylinder, it can perform two modes of motion (rotation and linear) with only one shaft. The rotary ball bar spline can operate by rotating or stopping with a nut/outer shaft, and can perform three modes of motion (rotation, spiral, and linear) with only one shaft. It is suitable for horizontal multi section robotic arms (SCARA) industrial robots, automatic loaders, laser processing machine feeding devices, ATC devices in machining centers, etc. It is most suitable for use on combination devices of rotary and linear motion.

High speed/smooth operation

The rotating series rods are designed with high lead and can move smoothly and at high speeds.

Precision Design of TBI Spline

The ball screw/spline is cracked according to the following specifications

Ball screw Ball spline

Axial clearance:Below 0Rotation direction clearance:Below 0 (P1: light preloading)

Lead accuracy:C5(Refer to Week C05) Accuracy level:class h

RFBY rotating nut SLF spline

RBLY series

model	C	D	E	F	I	H
RBLY01616	0.018	0.021	0.016	0.020	0.013	0.016
RBLY02020	0.018	0.021	0.016	0.020	0.013	0.016
RBLY02525	0.021	0.021	0.018	0.024	0.016	0.016
RBLY03232	0.021	0.021	0.018	0.024	0.016	0.016
RBLY04040	0.025	0.025	0.021	0.033	0.019	0.019
RBLY05050	0.025	0.025	0.021	0.033	0.019	0.019

TBI-RLBY series spline model size diagram

TBI-RLBY series spline model

RBLY01616RBLY02020RBLY02525RBLY03232RBLY04040RBLY05050