Ballscrews
96Pages

Ballscrews & Accessories

HIWIN GmbH Brücklesbünd 1 D-77654 Offenburg Phone +49 (0) 7 81 9 32 78 - 0 Fax +49 (0) 7 81 9 32 78 - 90 info@hiwin.de www.hiwin.de All rights reserved. Complete or partial reproduction is not permitted without our permission. Note: The technical data in this catalogue may be changed without prior

Ballscrews & Accessories Ballscrews consist of a shaft, a nut into which the balls are integrated and the ball recirculation system. Ballscrews are the type of threaded shaft most commonly used in industrial and precision machines. They are used to convert rotary motion into longitudinal motion and vice versa. They display great accuracy and are highly efficient. HIWIN provides a large selection of ballscrews suitable for all your applications. HIWIN ballscrews are distinguished by their low-friction and precise running, require little drive torque and offer good rigidity with smooth...

Ballscrews Contents

3.2 Procedure for selecting a ballscrew 12 3.4 Ball recirculation systems 13 3.6 Accuracy of the HIWIN ballscrews 15 3.9 Material and heat treatment 33 4.3 HIWIN order code for rolled ballscrews 35 4.4 Nuts for rolled ballscrews 36 5.3 HIWIN order code for peeled ballscrews 40 5.4 Nuts for peeled ballscrews 41 6.3 HIWIN order code for ground ballscrews 49 6.4 Nuts for ground ballscrews 50 7.2 Ballscrews for heavy-duty operation 61 8.1 Shaft ends and bearing configuration 62 8.3 SFA/SLA bearing series 68 8.4 Housing for flange nuts (DIN 69051 Part 5) 71 8.5 EK/EF bearing series 72 8.6 BK/BF...

Ballscrews Product overview

Rolled ballscrews { { { { Flange nuts and cylindrical nuts Reduced axial play available Nominal diameter 8 – 63 mm Standardised end machining Peeled ballscrews { { { { { Standard end machining Standard spindle bearings Nut housing Ball spline { Driven nut unit Ballscrews for heavy-duty operation Shaft ends and accessories { Flange nuts and cylindrical nuts Single and double nuts Nominal diameter 6 – 100 mm Preloaded or minimum axial play Ballscrews for special requirements { Flange nuts and cylindrical nuts Single and double nuts Nominal diameter 16 – 80 mm Standardised end machining Safety...

Ballscrews General information 2. General information 2.1 Properties There are many benefits associated with HIWIN ballscrews including high efficiency, freedom from axial play, high rigidity and high lead accuracy. The characteristic properties and benefits of HIWIN ballscrews are described in detail below. Fig. 2.1 Mechanical efficiency of threaded shafts 2.1.2 Zero play and high rigidity The pointed profile HIWIN uses for ballscrew shafts and nuts allows the ballscrew nuts to be assembled without any axial play. A preload is usually used to achieve the good overall rigidity and...

2.1.4 Reliable service life Whereas the life of standard screw drives is determined by wear on the contact surfaces, HIWIN ballscrews can be used virtually up until the end of the metal’s fatigue life. Great care is exercised in development, choice of material, heat treatment and manufacturing, as is demonstrated by the reliability and resilience of HIWIN ballscrews over their nominal service life. With every kind of ballscrew, the service 2.1.5 Low starting torque with smooth operation The rolling friction of the balls in ballscrews only requires a very low starting torque. To achieve...

Ballscrews Structural properties and selection of HIWIN ballscrews 3. Structural properties and selection of HIWIN ballscrews 3.1 Design information a) Select a suitable ballscrew for your application (see Table 3.6). The relevant requirements must be noted for installation. For precision-ground ballscrews with CNC machines, this means careful alignment and the corresponding type of installation; for applications requiring less precision, we recommend rolled ballscrews, which require less work when designing the type of installation and bearings. F F Radial load T Moment load Fig. 3.1...

d) Precautionary measures must be taken to stop the ballscrew nut once the useful path has been exceeded (see Fig. 3.3). Travel against an axial fixed stop results in damage. Fig. 3.3 Mechanical stop which prevents the travel distance from being e) In environments with high levels of dust or metal debris, ballscrews should be provided with a telescopic or bellows shaft protection (see Fig. 3.4). Fig. 3.4 Telescopic or bellows shaft protection f) When using an internal or end cap ball recirculation system, the ball thread must be cut to the end of the shaft. The diameter of the adjacent...

3.2 Procedure for selecting a ballscrew Table 3.1 shows the procedure for selecting a ballscrew. The usage requirements (A) can be used to determine the necessary ballscrew parameters (B). The ballscrew suited to the application can therefore be determined one step at a time following the information provided (C).

3.3 Ballscrew shafts HIWIN offers rolled, peeled and ground ballscrews - depending on the application requirements. For the selection of the appropriate shaft the individual characteristics are listed in Table 3.2. 1) Depends on the diameter and the tolerance class 3.4 Ball recirculation systems HIWIN ballscrews are available with three different recirculation systems. The external recirculation system consists of the return tubes and the clamping plate. The balls are placed in the ball track between the ballscrew shaft and nut. At the end of the nut, they are guided out of the ball track...

3.5 Wiper variants NBR wiper (N): the allrounder The nitrile rubber wiper offers excellent sealing and wiping properties for most environmental conditions and is therefore used in almost all applications. NBR-finger wiper (K): the one for the rough stuff Wherever stubborn dirt prevails, it really cleans up. The finger wiper with its hard plastic fingers should not be missing in environments with coarse dirt particles. Felt wiper (F): the most absorbent among the wipers Felt has the property of absorbing liquids, storing them and releasing them again. This gives the felt wiper an ideal...