Ball Screw Assemblies
Ball Screw Assemblies
LINTECH specializes in designing and manufacturing linear positioning components, offering both standard and custom assemblies. Standard components are typically shipped within two weeks, while custom assemblies are tailored to specific performance needs.
LINTECH provides comprehensive technical support through a trained customer service team, experienced engineers, and a versatile machining facility. Automation Specialists are available globally to assist with motion control products.
LINTECH offers three series of ball screws: RS, PS, and GS, each differing in precision, noise, and cost. The RS series uses rolled ball screws, the PS series uses precision rolled screws, and the GS series uses ground screws. Preloaded nuts are available for enhanced repeatability.
Key considerations include lead error, backlash, repeatability, and noise levels. The document compares the RS, PS, and GS series, highlighting their strengths and limitations.
The selection involves identifying system requirements, desired travel life, load effects, maximum safe speed, and safe compression load. Examples and calculations are provided to guide users.
Specifications for screw diameters and leads are detailed, along with options for motor mounts, encoders, and brakes. Factors like speed, load, and duty cycle are crucial when selecting components.
The document discusses the impact of compression and tension loads on ball screw assemblies, with recommendations for horizontal and vertical applications to prevent buckling.
The life of support housing depends on thrust load and screw revolutions. Torque and force calculations are necessary for longevity.
Environmental factors such as temperature and humidity can affect ball screw assembly life. Protective measures like bellows or chrome plating may be needed.
Regular lubrication is essential for longevity. If maintenance is not feasible, a larger safety margin or automatic lubrication is recommended.
Repeatability is the ability to return to a known position, while accuracy is about reaching a precise location. Both are critical for performance.
Factors affecting maximum speed and compression load include screw diameter, length, and support configuration. Exceeding limits can lead to failure.
Torque equations for lead screws are provided, emphasizing the importance of calculating maximum torque during different movement phases.
Detailed specifications for ball screw assemblies include thrust force, screw lead, efficiency, frictional force, load inertia, and safety factors. Torque calculations are outlined.
Three types of ball screws are available: Rolled Screw (RS), Precision Screw (PS), and Ground Screw (GS). The document details screw diameter, nut flange types, and motor mount options.
Design considerations include lubrication, acceleration rates, speed limits, and compression load capacities. Proper lubrication prevents wear and oxidation.
Key terms such as backlash, breakaway torque, dynamic load, lead error, and repeatability are defined, explaining their significance in ball screw operation.
Recommendations include maintaining safety factors for motor systems and periodic re-lubrication to ensure longevity.
Additional features include rotary encoders, power-off brakes, and coupling types. Information on thread length, screw efficiency, and travel length is provided.
Ball screw assemblies are used in various applications, including automation, medical equipment, and semiconductor processing.
The document provides specifications and guidelines for RS Series ball screws, focusing on screw diameters, nut styles, load capacities, and performance characteristics.
LINTECH has over 41 years of experience in mechanical motion control products, offering a range of standard and custom solutions.
Standard products are delivered within 1 to 6 weeks. Payments can be made via C.O.D, credit card, or net 30 days. Late payments incur interest.
Products are warranted against defects for one year. Returns require pre-approval and an RMA number.
Catalog excerpts
Welcome to LINTECH ® Our local technical support group consists of Automation Specialists located throughout the World. These Automation Specialists are experienced in the use of electronic and mechanical motion control products. They are well trained on the performance capabilities of LINTECH positioning components. LINTECH is constantly designing new products and improving upon the many options available with our standard products. Whether it is a standard or custom positioning system required, visit our website, call, or e-mail us. We look forward to hearing from you. Visit our website, or...
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Table of Contents Pages 2 - 18 Design Considerations Product Comparisons How to Select an Assembly Application Guide Screw Travel Life Maximum Speed Maximum Compression Load Motor Sizing Part Number Description Definitions 2-4 5-8 9 10 11 12 13 14 15 - 18 Iintroduction of RS, PS and GS 19 - 21 19 - 21 Introduction 22 - 61 RS Series 0.500 0.625 0.750 1.000 1.500 inch inch inch inch inch Diameter Diameter Diameter Diameter Diameter 22 - 29 30 - 37 38 - 45 46 - 53 54 - 61 Screws Screws Screws Screws Screws 62 - 77 PS Series 0.625 inch & 16 mm Diameter Screws 0.750 inch & 20 mm Diameter Screws 78...
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Design Considerations Design Consideration RS Series * * * * * * * inch inch inch inch inch inch inch inch inch inch inch inch inch dia., dia., dia., dia., dia., dia., dia., dia., dia., dia., dia., dia., dia., 0.200 0.500 0.200 1.000 0.200 0.500 0.250 0.500 1.000 0.250 0.500 1.000 2.000 inch inch inch inch inch inch inch inch inch inch inch inch inch PS Series GS Series * * * * * * * Rolled Ball Screw Tapped Ball Nut English Leads English Diameters Pre-loaded & Non-preloaded Nuts Simple, Fixed and Rigid Housings Available Sizes 0.500 0.500 0.625 0.625 0.750 0.750 1.000 1.000 1.000 1.500 1.500...
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Design Considerations Product Comparisons Ball screws are the lead screw of choice for high duty cycle, high speed, and long life applications. The ball screw nut uses one or more circuits of recirculating steel balls which roll between the nut and ball screw threads (grooves), providing an efficient low friction system. Using a higher lead ball screw (a 0.500 inch lead instead of a 0.200 inch lead) will offer greater carriage speed for applications requiring rapid traverse or fast, short incremental moves. Low wear and long life are key features of a ball screw system. Ball screws from LINTECH...
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Design Considerations Product Comparisons Simple Support Housing * * * * * Fixed (LT) Support Housing All Steel Construction Black Oxide Finish 1 Sealed Radial Bearing No Lubrication Required Base or Face Mounted * * * * * * * Fixed (HT) Support Housing * * * * * * * All Steel Construction Black Oxide Finish 2 Back to Back Sealed Radial Bearings No Lubrication Required Lip Seals Base or Face Mounted Motor Mount Options Rigid Support Housing All Steel Construction Black Oxide Finish 2 Back to Back Angular Contact Bearings No Lubrication Required Lip Seals Base or Face Mounted Motor Mount Options...
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Design Considerations How to Select an Assembly Overview Step 3 - Determine the Effect of the Load LINTECH's ball screw assemblies can be used in a wide variety of Motion Control applications. Proper selection of an assembly will yield a system that meets the performance requirements with trouble free long term operation. The following steps should be used as a guide to aid in the selection process. Will the ball screw assembly be mounted in a horizontal or vertical plane? We need to determine the load as seen by the "ball screw nut" and as seen by the "support housings". In a horizontal application,...
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Design Considerations How to Select an Assembly Step 4 - Determine the Maximum Safe Speed Step 5 - Determine the Safe Compression Load This is a mechanical limitation defined as the top speed which, if exceeded, has the potential to cause excessive vibration, and damage to the screw, or support bearings. Screw charts are provided for all screws in RPM of the screw. To convert to inches/second, multiply by the desired screw lead. A compression load tends to compress or buckle a ball screw shaft. If a sufficiently heavy load is applied to a nut with a long ball screw in a horitontal application,...
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Design Considerations How to Select an Assembly Step 7 - Applying Safety Factors Dynamic Loads The steel balls of a ball screw nut, or the materials of a Turcite nut, are always subject to repeated stresses in a ball screw application. A key element in the selection process is to determine an adequate safety margin for load/life of a ball screw and support housings. These loads exert a force upon the screw & nut while the screw is in motion. If the rated load of a particular ball screw assembly is exceeded, there is a resultant reduction in the overall travel life. Safety factors are important...
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Design Considerations How to Select an Assembly Step 8 - Review Other Issues Motor Control System As the steel balls of a ball nut circulate through the nut, audible noise is created. The level of this audible noise is determined by the ball screw type, nut design, screw lead, screw rotational speed, coupling style, and motor type used to rotate the screw. Generally speaking, a GS series operates quieter than a PS series, and a PS series operates quieter than a RS series. Because there are no rolling elements in a Turcite nut, this nut option can operate very quietly. The motor control system...
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LINTECH ® Ball Screw Assemblies Name Application Guide Date Z axis X axis Y axis Company Address City State ( Phone ) Fax Zip ( ) Positioning System Specifications X Y X Z Ball Screw Type (%) English or Metric Travel Length (L-N) (E or M) (inches or mm) Shock/Impact Loads Repeatability (none, low, medium, high) Z Duty Cycle (rolled, precision, ground) Y (inches or mm) Overall Travel Life Lead Error (millions of inches or Km) (inch/ft or mm/300mm) Maximum Accel Nut Flange Type (inches/sec2 or m/sec2) (round, vertical, "L") Maximum Speed Motor Frame Size (inches/sec or m/sec) (NEMA 23, 34, 42,...
Open the catalog to page 11All LinTech catalogs and technical brochures
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