Apex Precision Mechatronix Pvt. Ltd. Supplies Safety Couplings with Lower Residual Friction. Apex Precision Mechatronix Pvt. Ltd. Is an ISO registered organisation that offers Automotive & Industrial Oil Seals, Flexible Shaft, Encoder Couplings, Clamps, Power Jacks, Speed Guide, etc. The Safety Couplings with Lower Residual Friction features backlash free, low momentum of Inertia, and rapid separation if overload torque.