Safety Nuts For Type 2 Jacks 27 * As new, will decrease with wear over time and be replaced when approaching zero ** Length B should be considered when calculating total thread length PLEASE SPECIFY SAFETY NUT FORM WHEN ORDERING AS SHORT TYPE IS SUPPLIED AS STANDARD LONG TYPE RECOMMENDED FOR VBG 16.4.5 or VBG 14 SPECIFIC APPLICATIONS WMH worm gear screw jacks are designed according to current regulations for use on theatre stages (VBG 16.4.5), lifting platforms (VBG 14) or jacking systems that might affect personal safety. WMH worm gear screw jacks include such items as anti-drop systems (self locking screw threads and / or mechanical safety brakes as part of the drive system). The function of the synchronising device is guaranteed, when required, by additional components. Size A * B ** C Part Number ~ SHORT TYPE ~ M0 ON REQUEST 563-000-002 M1 563-100-002 M2 5 25 45 563-200-002 M3 5 35 50 563-300-002 M4 5 40 70 563-400-002 M5 5 60 90 563-500-002 M6 10 80 130 563-600-002 M7 10 80 150 563-700-002 M8 ON REQUEST 563-800-002 ~ LONG TYPE ~ M0 ON REQUEST 563-000-003 M1 563-100-003 M2 5 45 45 563-200-003 M3 5 55 50 563-300-003 M4 5 70 70 563-400-003 M5 5 85 90 563-500-003 M6 10 135 130 563-600-003 M7 10 160 150 563-700-003 M8 ON REQUEST 563-800-003 TEL: 01827 288122 sales@wmh-trans.co.uk FAX: 01827 253390 www.wmh-trans.co.uk C B A* Thread Length + B** B C D 1 2 A 3 2 1 4 5 DRAWN CHK'D APPV'D MFG Q.A UNLESS OTHERWISE SPECIFIED: DIMENSIONS ARE IN MILLIMETERS SURFACE FINISH: TOLERANCES: LINEAR: ANGULAR: FINISH: DEBUR AND BREAK SHARP EDGES NAME SIGNATURE DATE MATERIAL: DO NOT SCALE DRAW TITLE: DWG NO. SCALE:1:5 WEIGHT: Assem2 WMH travelling nut (type 2) screw jacks can be fitted with an optional safety nut to prevent loads falling if the main nut has worn excessively or brakes. The safety nut can also be used to precisely monitor wear of the main nut as the clearance between the two reduces with wear over time. It is important that the safety nut is installed behind the main nut in the direction of the load as illustrated to ensure correct operation. WMH safety nuts are available in short (standard) or long formats. COMPRESSION TENSION