Servomech

®

1.3 MATERIALS AND MACHINING TOLERANCES

SERVOMECH linear actuators are manufactured completely inside with high tech CNC machinery.Quality system currently in line with ISO 9002.Statistical control to monitor the components batch quality during the manufacturing process.Final inspection and testing are carried out on every finished product to ensure the total reliability of theproduct.Input drive: Worm gear, geometric design for high performances according to British Standard BS 721.ZI involute profile, low angular backlash. Wormwheel in bronze EN 1982 – CuSn12-C. Worm incasehardened steel 20MnCr5 UNI 7846 with thread and input shafts ground. Timing pulleys UNI 8530 in aluminium for low inertia or in steel. Industrial timing belts UNI 8529, on requestHTD series.Housing: Housings are designed and manufactured in monoblock form to achieve:- high quality and accuracy of the mechanical work, - strong and compact body able to sustain heavy push or pull loads. High quality material are used: Hardened aluminium alloy EN 1706 AC-AlSi10 T6 Spheroidal industrial graphite cast iron EN 1563 – GJS-500-7.Bronze nut - profile UNI ISO 2901-2904 1 start nut: material bronzeEN 1982 – CuAl9-C Rolled or cut Material: steel C 43 UNI 7847 2 starts nut: material bronzeEN 1982 – CuSn12-C Straightened to ensure the perfect alignmentwhen working Max. axial backlash with unused nut(0.10 Max. lead error 0.05 mm on 300 mm lengthBall screw 0.12) mmBall nut Carried out to SERVOMECH design Rolled and hardenedMaterial: 42CrMo4 UNI 7845Max. lead error Sized to guarantee high load capacityand performances 0.05 mm on 300 mm length Material: casehardened steel 18NiCrMo5UNI 7846 Hardened and groundMaterial: 42CrMo4 UNI 7845Max. lead error Ground profile 0.025 mm on 300 mm lengthOuter tubes in aluminium or steel Max. axial backlash (0.07 0.08) mmPush rod Thick chrome plated steel tube Thick cold-drawn aluminium tube-Material: alloy 6060 UNI 90006/1- Anodizing 20 - Material St 52 DIN 2391 - Min. chrome plating thickness 0.05 mm m- Inner tolerance ISO H9 - Tolerance on outer diameter ISO f7On request push rods in stainless steel AISI 304available. Trapezoidal acme screw profile UNI ISO 2901-2904 Cold-drawn steel tube- Material: St 52.2 DIN 2391 - Outer galvanizing- Inner tolerance ISO H10 H11Bearings Ball bearings on motor axis Preloaded angular contact ball bearings or taper roller bearings on actuator axis to avoid anyaxial backlash and to guarantee a high push-pull load capacity.Front attachment Stainless steel AISI 303Electrical stroke limit switches and rear bracket Material: aluminium alloy (ATL-BSA 10, 20, 25, 30, 40 and Series UAL-UBA),spheroidal graphite iron (ATL-BSA 50, 63, 80) Pins in stainless steel AISI 303 Adjustable rings in brass OT 58 UNI 5705/65
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