139 The permitted radial and axial loads on the output shaft of the gearbox are dependant on the design of the output bearing arrangement. APEX use the extension straddle oversized bearing design thus allowing for heavy loads on both axis. FOR TECHNICAL SUPPORT OR QUERIES PLEASE CONTACT OUR SALES TEAM TEL: 01827 288122 sales@wmh-trans.co.uk FAX: 01827 253390 www.wmh-trans.co.uk CTV series LINEAR UNITS CHARACTERISTICS The CTV series describes Linear Units with a precision ball screw drive and two parallel, integrated, Zero- backlash rail guides. Compact dimensions allow high performance features such as, high speeds, good accuracy and repeatability. They can easily be combined to multi-axis systems. Excellent price-/performance ratio and quick delivery time are ensured. The compact, precision-extruded aluminum Profile from AL 6063, with two parallel, integrated, Zero- backlash rail guide systems, allows high load capacities and optimal cycles for the movement of larger masses at high speed. In the Linear Units CTV a precision ball screw, with tolerance class ISO7 ( ISO5 on request), with reduced backlash of the ball nut is used. Two parallel circulating antistatic polyurethane sealing strips and an aluminum cover are ensuring to protect all the parts in the profile from dust and other contaminantions. Different carriage lengths with lubrication port allows for easy re-lubrication of the ball screw and Ball rail guide system and allows the possibility to attach additional accessories. The re-lubrication can also be done through maintenance holes on the side of the Profile. The aluminum profile includes T-slots for fixing the Linear Unit and for attaching sensors and switches. Also, a Reed switch can be used here. For the linear units CTV various adaptation options, for attaching (or redirecting), for Motors or Gearboxes are available. The aluminium profiles are manufactured according to the medium EN 12020-2 standard Straightness = 0,35 mm/m; Max. torsion = 0,35 mm/m; Angular torsion = 0,2 mm/40 mm; Parallelism = 0,2 mm Permitted radial loads are dependant on the nominal output speed of the gearbox as can be seen on the below graph. If the radial force is not exerted on the centre of the output shaft (length/2) then the permitted loads can be calculated based on the position load factor as depicted on the below graph. CONTINUOUS RUNNING REDUCES SERVICE LIFE BY 50% PEII / PEIIR 155 PEII / PEIIR 120 PEII / PEIIR 090 PEII / PEIIR 070 PEII / PEIIR 050 PEII / PEIIR 155 PEII / PEIIR 120 PEII / PEIIR 090 PEII / PEIIR 070 PEII / PEIIR 050 PEII Output Loads CONTINUOUS RUNNING REDUCES SERVICE LIFE BY 50%