Linear Motion with High Speeds and High Efficiency

A new range of ball screws with diameters 14 to 100mm manufactured by Servomech offers high precision and short delivery times. Ball screws and nuts with standard dimensions to ISO 3408 and DIN 69051 are available from stocked components with machining done fully in-house. Accuracy grades from class 7 up to class 3 are offered for transport and positioning applications.

Ball screws can be considered as a system which comprises the screw and the nut, achieving linear motion with high precision and/or high speed. Stiffness is also high and ball screws are capable of operation in elevated ambient temperatures. Servomech ball screws have diameters from 14 to 100 mm with efficiency at about 90%. Compared to hydraulic and pneumatic systems, ball screws are easy to control and cleaner. Compared against belt driven systems and linear actuators they are more precise and can be faster at up to 2m/s linear speeds.

Servomech machine their ball screws in-house and so are totally in control of design and quality. The screws are manufactured by rolling or by a process known as whirling which produces a quality similar to grinding. Accuracy grades range from class 7, which is suitable for the majority of applications, up to class 3 which is high precision suitable for machine tools. Screws are stocked in lengths up to 5.7m with a range of pitches from 5 to 40mm.

Ball nuts are also manufactured in-house to DIN 69051, matching the screws. Two ball recirculating systems are used – the radial liner where the balls made one revolution before being returned to the original track, and frontal deflector where the ball raceway travels the whole length of the nut before returning. Single nuts are either standard or preloaded to remove backlash, and double preloaded nuts have higher load ratings.
Servomech ball screw systems are available in the UK through Techdrives. The selection and ordering process is made as easy as possible by involving UK Engineers and factory-based expertise. Optimised selections are made considering the speeds, loads, accuracy required, duty and the environment. Dimensions to the international standards are readily available, but also the in-house manufacture means special dimensions can be offered.

Comments

Post a Comment

Popular posts from this blog

What is Class I Division 2?

Image
A Class I Division 2 is a location: (1) In which volatile flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are handled, processed, or used, but in which the liquids, vapors, or gases will normally be confined within closed containers or closed systems from which they can escape only in case of accidental rupture or breakdown of such containers or systems or in case of abnormal operation of equipment, or (2) In which ignitable concentrations of flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are normally prevented by positive mechanical ventilation, and which might become hazardous through failure or abnormal operation of the ventilating equipment. Class I Division 2 Classification Class I Division 2 refers to the ANSI/ISA 12.12.01 standard. This standard was previously UL1604 until UL recommended the newer ANSI/ISA standard be used and that all hazardous location products be certified under this standa
Read more

FUSE SIZING CONSIDERATIONS FOR HIGHER EFFICIENCY MOTORS

Image
When selecting the proper fuse for short circuit protection in motor starting applications, it is important to not only ensure that the fuse will not nuisance open during motor start up times, but also that the fuse will coordinate as required with overload relays. When sizing fuses between 125% and 150% of the motor nameplate current, several advantages, including ease of coordination with an overload device, a smaller disconnect, and increased short circuit protection from a lower fuse rating, can be achieved. However, if sizing at this level prevents the motor from starting, it may then be necessary to increase the fuse ampere rating and it then becomes important to know the NEC sizing limitations. As of June 1, 2016, the US Department of Energy has mandated that newly manufactured electric motors will need to meet NEMA Premium® efficiency standards. As motor efficiencies increase, motor locked rotor currents can also be expected to increase. In addition to this, with across-the-lin
Read more

7/8 16UN Connectors that Provide 600 Volts and 15 Amps

TURCK announces new A-Size 3 and 4-pin 7/8 16UN powerfast™ connectors that provide up to 600 Volts and 15 Amps of power. These IP67 rated connectors provide a modular wiring system designed to handle high current applications for machine power distribution, while providing resistance to vibration commonly associated with conveyors, motors and material handling applications. The cordsets are available with a tray rated, exposed run PVC flexlife ® cable, with or without STOOW rating, and 14 AWG wires that allow you to replace hard wiring with a robust, quick disconnect system that saves the time and money spent installing a conduit system. The A-Size powerfast line offers male and female, straight connectors, standard and custom lengths, and pigtails or extensions. To make the system complete, fully encapsulated mating receptacles, with 1/2”-14 NPT mounting threads are available.
Read more