Superb highspeed response caged ball type dn value. Standard combinations of shaft diameter and lead for the rolled ball screw. As well as being able to apply or withstand high thrust loads, they can do so with minimum internal friction. Also, the figures are free of the influence arrangement type. A ball screw is a mechanical linear actuator that translates rotational motion to linear motion with little friction. Features and types ball screw thk pdf catalogs technical.
Rolled ball screw thread diameter 15 lead 5,10 or 20. Ball centertocenter diameter thread minor diameter no. The support unit on the supported side uses a deepgroove ball bearing. Precision, caged ball screw free operation z high speed, loadbearing capacity thanks to the ball circulating method supporting high speed and the caged ball technology, the ball. Me en 7960 precision machine design ball screw calculations 410 fixedsupported mount source. A682 features and types ball screw features of the ball screw driving torque one third of the sliding screw with the ball screw, balls roll between the screw shaft and the nut to achieve high efficiency. Ball screw features of the ball screw driving torque one third of the sliding screw with the ball screw, balls. See the specifications tab to see standard sizes available. The precision ball screw system ps series utilizes a ground nut with a higher accuracy rolled ball screw. Mcmastercarr is the complete source for your plant with over 595,000 products.
With the worlds leading ball screw, nsk has been contributing to industrial growth. Consult thks entire features and types ball screw catalogue on directindustry. Recommended tip shape designations are now selectable. Join the grabcad community today to gain access and download. Super large ball screw designed for electrically operated plastic injection moulding machines with a clamping force up to 3000 tons and more. Lubrication internally lubricated plastic nuts will operate without lubrication. The ball screw requires a minimal starting torque due to its rolling motion, and does not cause a slip, which is inevitable with a sliding motion. As a result, low noise, low torque fluctuation and longterm maintenancefree. The ball screw is a highefficiency feed screw with the ball making a rolling motion between the screw axis and the nut. Thk ball screw the ball screw is a highefficiency feed screw with the ball making a rolling motion between the screw axis and the nut. This makes it possible to achieve a low noise, a low torque fluctuation and a longterm maintenancefree operation.
Ball screw selection and calculations university of utah. Consult thks entire lm actuator gl catalogue on directindustry. The simplenut ball screw is an offset preload type in which a phase is provided in the middle of a single ball screw nut, and an axial clearance is set at a belowzero value under a preload. However, additional lubrication or ptfe coating of the screw is recommended to optimize efficiency and life. The full length the ball screw nut is shorter than the double nut type, which realizes a. Product information is updated regularly on the thk website. Precision ball screws din standard compliant ball screw. Nsk ball screws were developed through cuttingedge tribology friction control technology, and nsk manufactures the largest volume in the world with its outstanding production and quality control techniques. A ball screw that achieves low noise, small torque fluctuations and longterm maintenancefree operation by using a ball cage.
Our standard ball screws are supplied with machining that will work with these supports without modification. Purchase thk products online, linear motion guides, actuators, ball screws, cross roller rings, linear bushings, and even custom parts. Search in thk catalogs and technical brochures on directindustry and find the information you need in 1 click. Compared with a conventional sliding screw, the ball screw requires driving torque of onethird or. Over ball preloaded type or nonpreloaded type model number coding model no. Ball screw the ball screw is a highefficiency method of converting rotary motion to linear motion by using a recirculating ball mechanism between the screw shaft and the nut. As a result, the longterm maintenancefree operation i. Dimensions of the ball screw k307 k 307 recommendedshapesofshaftends k306 model bk f s r p j e nh. A threaded shaft provides a helical raceway for ball bearings which act as a precision screw. The balls in this design tr whole circuit of the ball tracks within the nut length. Inball screws from l tech are available in three different versions. The ff simplefloating support has only a standard ball bearing that provides rotational support on the end of the ball screw opposite of where the drive occurs typically a motor or pulley.
Therefl nut with the same load capacity as the conventional design c. It is possible to design a machine based on required life. Products thk linear bearings, thk bearings,thk guide. Compared with a conventional sliding screw, this product has drive torque of onethird or less, making it most suitable for saving drive motor power. Make a request and we will contact the manufacturer.
Therefore, it is capable of an accurate micro feeding. These compact and efficient means of converting rotary motion to linear motion units are chosen for applications such as vertical large camera focusing, semiconductor wafers positioning, backlash free hardness testing, auto parts positioning for inspection, and so on. Screw shaft outer diameter lead ball diameter ball centertocenter diameter screw shaft outer diameter no. Ball centertocenter diameter indicated in the speci. Bestequip ball screw sfe1616mm antibacklash ballscrew 6. Ball screw note the ball screw nut and the screw shaft of model jpf are not sold alone. A h7 recommended shapes of shaft ends shape j j1, j2 and j3 for support unit model bk support unit model no. Limiting speeds are based on the standard preload of each bearing. Compared with a conventional sliding serew, this product has drive torque of onethird or less, making it most suitable for saving drive motor power. Precision ball screws thread diameters 12 lead 2,4,5 or 10 precision grade c3,c5 or c7.
Basic dynamic load rating c a the dynamic rating is used to compute the fatigue life of ball screws. Ball screw automation components from thk for industrial applications. Ballscrew technical descriptions ballscrew product specifications. It is the axial load constant in magnitude and direction, and acting centrally under which the nominal life as defined by iso reaches one million revolutions. The grabcad library offers millions of free cad designs, cad files, and 3d models.
Variety largest range of leads and diameters 316 to 3 to match your requirements. You can order only 1 piece with no delivery charge. It has a grounded steel screw for strength and hardness, with rolled thread for stronger, smoother surface than cut thread. The ball screw is a highefficiency method of converting rotary motion to linear motion by using a recirculating ball mechanism between the screw shaft and the nut. Considerable savings when compared to ball screw assemblies. The simplenut ball screw has a more compact structure and allows smoother motion than the conventional doublenut type spacer inserted between two nuts. Table 3 shows the maximum manufacturing lengths of precision ball screws by accuracy grades. Nextgeneration ball screws for heavy load applications, evolved from the bestselling htf series of highload ball screws. Highspeed caged ball screw model sbk rg speed control. This thk ball screw assembly is a 40 mm stroke feed screw and ball nut for transmitting rotary motion into linear motion. Thk steel precision ball screw assembly model bnk0601. Ball screw kit preassembled diagram for ball screw specifications type j twill braid ball screw assembly kit belt ball screw 15 lead 30 16 lead 5 lead 16 pitch 5 belt width 25 number of pulley teeth 22 bolt for assembly accessory parts hexagonal hole bolts. Ball screws feed screw products thk america official. The lm guide and ball screw are indispensable for the movement of the tool section of the lathe.
Overball preloaded type or nonpreloaded type model number coding model no. The thk kr series linear slide consists of a highly ridid outer rail with a ushaped cross section, lm guide units on both sides and a ball screw unit in the center. The thk kr series linear slide consists of a highly rigid outer rail with a ushaped cross section, lm guide units on both sides and a ball screw unit in the center. Low noise, longterm maintenancefree operation, low torque fluctuation. Ball screws work in a similar fashion to ball bearings, where hardened steel balls move. Viewing pdf files to view a pdf file, click on the pdf symbol adobe reader is required. The rotary ball screw is a rotarynut ball screw unit in which a ball screw nut is integrated with a support bearing. Ball screw rolled ball screw models jpf, btk, mtf, blkwtf. Highspeed ball screw with caged ball model sbklarge lead. A wide variety of thk precision ball screws options are available to you, such as manufacturing process, condition, and applicable industries. Thk highspeed caged ball screw is manufactured with accuracy compliant. Thk shs30c in order to repeat the production of this advanced product, the lm guide and ball screw in the milling machine guide system which dont waste of action 3.
If a ball screw not covered by the table is required,contact thk. Misumi offers free cad downloads, short lead times, competitive pricing, and no minimum order quantity. Feed screw ball screw ball screw standardlead rolled ball screw nonpreloaded type btkv 3d cad models. Misumi has 2600 brands, 9 millions products of automation components, fastners and materials. For this model, screw shafts thk ball screw catalogue a screw shaft outer diameter 4 to 25 mm and a. But because the ball nut is only one component in the ball screw assembly, and its rigidity is relatively high compared to the other components, increasing the preload from 3 percent to 5 percent, for example has a minimal effect on the rigidity of the assembly. Nsktac series of ball screw support bearings for highload. High rigidity, compact and space saving linear slide. Lubricant thk afj grease quantity 4cm 3 lubricated every 500km applied load 1. A ball screw consists of a threaded shaft and a nut, and either one can act as the traversing component. The simplenut ball screw has a more compact structure and allows smoother motion than the con.
Ordering a catalog put a check next to the catalog you want to order and then click on the button at the bottom of the page. Distance between two mounting surfaces permissible axial. High speed ball screw non caged rotary ball screw model blr. Steel ball end cap screw shaft jlation type return caps ball nut the nut body as a through hole. Me en 7960 precision machine design ball screw calculations 49 fixed free mount source. Contains catalog pdf data for new products and mechatronic. The rolled ball screw system rs series utilizes a tapped nut with a standard accuracy rolled ball screw thread. Misumi offers free cad downloads, no moq with short lead times. Screw shaft outer diameter 14 to 40 lead 4 to 10 screw shaft outer diameter lead model no.
Nsktac series of ball screw support bearings for highload applications remarks. The support bearing is an angular bearing that has a contact angle of 60. Highspeed caged ball screw model sbk thk technical support. If you choose a recommended tip shape designation, accuracy for nonstandard lengths can be specified in units of 1 mm, even for c8 and c10 models. Caged ball miniature lm guide actuator model skr2026.
Method for mounting the ball screw shaft thk technical support. Thk shs30c thk linear bearings, thk bearings,thk guide. Higher preload also correlates with higher nut rigidity, which improves the rigidity of the complete screw assembly. Estimation of fatigue life of ball screw under given conditions is possible because the basics of life estimation are the same as those of rolling element bearings. Various sizes are available for the nut sizes of misumi ball screws. Inexpensive but only applicable for short ball screws andor slow speeds.