PIC Design - RBC Bearings

RDESIGNRECISIONNDUSTRIALOMPONENTSRLEAD SCREWS & NUTSA Range Of Styles / Inch And Metric SizesPS STYLE THREADSACME STYLE THREADSFLMOUNTINGFLANGEPZ PK PV ANR1 ANR2 ANR3SERIES SERIES SERIES SERIES SERIES SERIESPIC Design has significantly increased its rangeof lead screws and nuts to provide users with themost complete line in the industry. Designers areno longer confined to the original Acme leadscrews ... the new and innovative PS Seriesemploys a modified thread form that is designed formaximum life and quiet operation when used inconjunction with the patented anti-backlash nuts.PIC DESIGN LEAD SCREWSLead screws provide an economical solution forthe transfer of rotary motion to linear motion.All PIC Design lead screws are precision rolledfrom 303 stainless steel with a lead accuracy of.0006 in/ in (mm/ mm). They are stocked inboth inch and metric sizes with diameters thatrange from 3 /16" to 3 /4". Lengths are available upto six feet.The now familiar precision rolled Acme leadscrews are available with the above notedaccuracy when used with Turcite X (Acetal-Teflon and Silicone filled) nuts.The new PS style lead screws have accuraciessimilar to that of the Acme line, but featurea positional repeatability to within 50 microinches.These lead screws feature a burnishedfinish of 16 micro-inches, and a straightnessof .003 in/ ft.PS style lead screws are available uncoated orcoated with a custom composition of baked-onTeflon. This coating greatly improves lubricityand extends the normal life of the assembly byas much as 300%.www.pic-design.comInteractive catalog ■ CAD ■ e-commercePS STYLE THREADSAnti-Backlash NutsThe standard method for taking up backlash isto bias two nut halves axially using a type ofcompliant spring. Using this method, the springforce must be at least as great as the load to bemoved.The new PS style lead screws use a patentedaxial take-up mechanism, which effectively putsa stiff spacer between the nut halves. By usingthis design, the nut functions independently ofthe load, resulting in a low drag torque. Nutsare a self-lubricating polyacetal material.PZ Series anti-backlash nuts are ideal forvertical applications requiring noise andvibration control. This series accommodateslead screws with moderate loads, and diametersfrom 1 /4" to 1 /2".PK Series anti-backlash nuts are very low infrictional drag and are specifically designed for3 /8" diameter lead screws.PV Series anti-backlash nuts provide themaximum load carrying capability and thelightest axial and radial stiffness. This resultsin smooth, quiet operation, and long life.The PV series is best suited for higher loads,and is thus used on PIC’s largest lead screwswith 1 /2" and 3 /4" diameters.DESIGN®ACME STYLE THREADSPower And Anti-Backlash NutsPIC Design offers three Turcite X nuts that arecompatible with Acme style lead screws. Eachnut offers distinct advantages.ANR1 Series power nuts are used where arange of .003" to .007" axial backlash cansatisfy user requirements. The ANR1 isthe most economical.ANR2 Series anti-backlash nuts are designedfor applications requiring positional accuracyand repeatability. The ANR2 anti-backlash nutassembly consists of two halves with an axiallycompliant spring that provides some ability tofine tune preload. The spring preload on the nutmust be approximately 5% greater than theaxial load on the system.ANR3 Series anti-backlash nuts are designed tobe adjusted. An “O” ring spacer is placedbetween the two halves of the nut. The backhalf of the nut is adjusted by simply turning theoutside body until desired preload is obtained.The “O” ring provides for minor screw threaddeviations. ANR3 series nuts can be used forhigher loads than the ANR2 series.BALL SCREWS & NUTSSee the complete line of B style precision rolledball screws & nuts starting on page 3-15.Phone: 800-243-6125 ■ FAX: 203-758-8271E-Mail: sales@pic-design.com 3-1