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Combined motor and drylin linear unit for use under water or in a vacuum

23 October 2012

igus UK has augmented the motor programme for its drylin leadscrew units and belt drive modules with the introduction of ready-to-install combinations of motors and linear units for use under water or in a vacuum.

The drylin ZLW toothed belt drive module, with variable stroke length, is particularly well-suited for positioning small loads. The ZLW-1040-UW is specially developed for use under water and incorporates a PU toothed belt.

igus offers this complete with a 2-phase hybrid underwater stepper motor (NEMA 23) that can be operated at depths of up to 10m and features IP68 protection. Special lacquering protects the motor against corrosion and is guaranteed watertight for up to 1 bar; the permissible motor surface temperature ranges from -30 to + 80°C. 

In addition to underwater operation, the drive units are well-suited in applications that require regular cleaning with water, such as those found in the food and beverage industry. For more hygienic applications, the ZLW toothed belt drive can be replaced with the igus SLW-ESJ-1040 leadscrew linear unit, which is made of stainless steel.

In the semiconductor industry, many processes operate within a vacuum to optimise yield and productivity. To work properly in such conditions and without contaminating the vacuum, the linear units need to be lubricant-free, with low abrasion and corrosion-free.

In these conditions, igus recommends the leadscrew-driven stainless steel linear drive module (for example SLW-ESX-1040) with the NEMA 23 motor, which is suitable for vacuums up to 10-3 mbar. This stepper motor is also resistant against radiation up to 10 J/kg, and its housing is made of stainless steel; the permissible surface temperature of the motor is -20 to +80°C.

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