Haydon Switch & Instrument Inc. (HSI) has added a new series of Anti-Backlash nuts to its line of linear motion products. These new anti-backlash nuts are suitable for applications that require precise positioning as they eliminate the minimal backlash between the lead screw and nut interface on HSIâs external linear actuators. The nuts are manufactured from a proprietary self-lubricating polyacetal that, when combined with precision rolled stainless steel lead screws, provides low drag torque and smooth operation throughout the life of the assembly. They can also be operated without lubrication when combined with PTFE coated screws. The HSI âWâ? series anti-backlash nut assembly uses a patent pending system which preloads 2 threaded nut halves to eliminate backlash without sacrificing efficiency. This system optimises load carrying capability and bi-directional axial stiffness while minimizing drag torque and system lost motion. Both nut series are available with a thread mount and are easily customisable with a variety of standard or special flange configurations. These nuts are available in a wide range of diameters and leads that are compatible with HSIâs size 14, 17 and 23 linear actuators.