Stain­less steel guides keep you on track

DEMM Engineering & Manufacturing - - PRODUCT WATCH -

Hep­coMo­tion’s off-the-shelf stain­less steel lin­ear and ro­tary guides help en­gi­neers who are look­ing to de­sign sys­tems for vac­uum and ex­treme tem­per­a­ture en­vi­ron­ments.

Un­til now, en­gi­neers want­ing to move prod­ucts within a vac­uum or ex­treme tem­per­a­ture en­vi­ron­ment were faced with two choices. They ei­ther had to de­sign a be­spoke lin­ear mo­tion con­cept, or they could adapt an ex­ist­ing sys­tem to meet their needs.

A key fea­ture of the Hepco sys­tem is the use of stain­less steel. Stain­less steel is the de­fault choice for a vac­uum be­cause it doesn’t out­gas, is in­her­ently clean and non-cor­ro­sive, and there­fore suit­able for vac­uum ap­pli­ca­tions that re­quire a high level of clean­li­ness. Stain­less steel also doesn’t melt in high tem­per­a­ture en­vi­ron­ments.

Chris Rees, sales di­rec­tor at the firm says: “The rea­son our sys­tem works in a vac­uum or high tem­per­a­ture en­vi­ron­ment is down to two things, ma­te­rial se­lec­tion and some be­spoke de­sign.

“Vac­uum en­vi­ron­ments will cause any por­ous ma­te­ri­als to out­gas and there­fore fail. This ef­fec­tively rules out the use of any poly­mers, plas­tics and some sin­tered ma­te­ri­als.“

An­other ad­van­tage of the Hepco sys­tem is that a six bear­ing car­riage sys­tem, un­like a re­cir­cu­lat­ing ball rail sys­tem, has the abil­ity to tra­verse a large gap in the rail. This de­sign al­lows the car­riage plate (and com­po­nent placed upon it) to move from the out­side into the vac­uum cham­ber and act ef­fec­tively as an au­to­mated feed-in sys­tem.

The gap in the rail is es­sen­tial in or­der to al­low the door of the vac­uum cham­ber air­lock to be opened and closed, but the Hepco sys­tem fa­cil­i­tates this move­ment with ease.

The bear­ings are avail­able in sizes from 18 to 54mm in di­am­e­ter, with a broad range of fix­ing styles and load ca­pac­i­ties from 180 to 4200N. They have the same di­men­sions as the bear­ings in the Hepco SL2 range and can be sup­plied ready-mounted onto an SL2 or PRT2 car­riage plate, or as com­po­nents that users can mount onto their own car­riage as­sem­blies.

These prod­ucts are widely used in ap­pli­ca­tions such as: semi­con­duc­tor wafer and aerospace com­po­nent man­u­fac­ture; vapour de­po­si­tion pro­cesses; LCD panel/ plasma dis­play man­u­fac­ture and in vac­uum evap­o­ra­tion equip­ment. The LTSS bear­ings also ap­pear in low tem­per­a­ture ap­pli­ca­tions such as cold stores and spe­cialised freeze-dry equip­ment.

Con­tact: 0800 243 444 saleswn@johnbrooks.co.nz

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