S-98935A739 7/8"-6 x 12" ASTM A108 Acme Lead Screws and Nuts

Acme Lead Screws and Nuts

1456FA00668 Acme Lead Screws and Nuts
1456FA00668 Acme Lead Screws and Nuts

Image may differ from product. See technical specification for details.

Part No.
Part No. 1456FA00668
Equivalent to mcmaster :
98935A739

Basic Information

Component Lead Screw
Material Carbon Steel
Hardness Rockwell B61
RoHS RoHS 3 (2015/863/EU) Compliant
REACH REACH (EC 1907/2006) (01/17/2022, 223 SVHC) Compliant
Specifications Met ASTM A108

Thread Parameters

Thread Type Acme
Thread Direction Right Hand
Thread Size 7/8"-6
Threading Fully Threaded
Thread Fit Class 2G
System of Measurement Inch

Dimension Parameters

Length 12"

Lead Screw Specific Parameters

Number of Thread Starts 1
Travel Distance per Turn 0.167"
Speed Ratio 1:1

Load & Performance Parameters

Tensile Strength 64000 psi
Fastener Strength Grade/Class Grade 2
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Precise Motion Control with 0.167" travel per turn for accurate positioning in industrial applications
  • Enhanced Durability from Grade 2 carbon steel construction offering 64,000 psi tensile strength and Rockwell B61 hardness
  • Superior Thread Engagement through Class 2G thread fit ensuring reliable performance with minimal backlash
  • Optimized Power Transmission with ACME thread design providing efficient force transfer in motion systems
  • Full-Length Functionality with completely threaded 12" length for maximum utility in various mounting configurations
  • Regulatory Compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
  • Standardized Quality manufactured to ASTM A108 specifications for consistent performance and interchangeability

Professional Applications & Engineering Value

This 7/8-6 ACME threaded lead screw delivers exceptional value in precision motion control systems where reliability and accuracy are paramount. The Grade 2 carbon steel construction provides the ideal balance of strength and machinability, while the ACME thread form ensures efficient power transmission with reduced friction compared to standard V-threads. The fully threaded design allows for flexible positioning in linear actuators, CNC machinery, and industrial automation equipment. With its 0.167" travel per turn and Class 2G thread fit, this component minimizes backlash in positioning systems, making it particularly valuable in manufacturing environments requiring repeatable accuracy. The combination of 64,000 psi tensile strength and Rockwell B61 hardness ensures long service life even in demanding applications such as material handling systems, printing equipment, and precision measurement devices.

Specification Summary & Compliance

This ACME lead screw features precise 7/8-6 thread size with Class 2G thread fit tolerance for optimal performance in motion control applications. The component is manufactured in compliance with ASTM A108 specifications, ensuring dimensional accuracy and material consistency. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, making it suitable for use in regulated industries. The right-hand thread direction and single thread start configuration provide standardized operation compatible with industry-standard ACME nuts and mounting systems.

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