After you choose the physique length and out of doors diamesion, pls should depart us message the internal gap size,it is awfully important!!!LT-B-D30L35Parallel line couplingONE SIDE HOLE SIZE CAN MESSAGE(D1):8/9/10/11/12/13/14/15/16MMTHE OTHER SIDE HOLE SIZE CAN MESSAGE(D2):8/9/10/11/12/13/14/15/16MMFor example: LT-B-D30L35 D1:8 D2:12LT-D-D30L35Parallel line couplingONE SIDE HOLE SIZE CAN MESSAGE(D1):8/9/10/11/12/13/14/15/16/17/18MMTHE OTHER SIDE HOLE SIZE CAN MESSAGE(D2):8/9/10/11/12/13/14/15/16/17/18MMFor example: LT-D-D30L35 D1:9 D2:121set customize feeShaft diameterKeyway widthKeyway depthTolarance0.5usd for LD / LF / LB / LE1usd for LL / LT/ LR 2usd for LP (line cutting) Customization link10-12mm4mm1.8mm0.1mm12.7-17mm5mm2.3mm18-22mm6mm2.8mm23-30mm8mm3.3mm0.2mm31-38mm10mm3.3mm39-44mm12mm3.3mm45-50mm14mm3.5mm51-58mm16mm4.3mm59-65mm18mm4.4mmModelD(mm)L(mm)D1-D2(mm)ML1(mm)L2(mm)L3(mm)Screw fasten torque(n.m)LT-B-D15L2015203-6.35M2.531.50.51.1LT-B-D19L2519254-8M2.531.50.51.1LT-B-D25L3025305-12M341.50.52.1LT-B-D30L3530358-16M351.50.52.1LT-B-D35L4035408-20M451.80.64.9LT-B-D40L45404510-25M561.80.610LT-D-D15L2015203-8M331.50.52.1LT-D-D19L2519256-10M431.50.54.9LT-D-D25L3025308-12M441.50.54.9LT-D-D30L3530358-18M551.50.510LT-D-D35L4035408-22M551.80.610LT-D-D40L45404510-28M661.80.617ModelRated torque(n.m)Maximum torque(n.m)Maximum speed(rpm)Moment of inertia(kg.m2)Permissible parallel misallgnment(mm)Permissible angular misallgnment(degree)Weight(g)LT-B-D15L200.51300002.5*10-70.050.520LT-B-D19L2512250005.8*10-70.050.529LT-B-D25L301.53180001.8*10-60.050.550LT-B-D30L3524160004.7*10-60.050.577LT-B-D35L4036140001.1*10-50.050.5114LT-B-D40L45612120002.3*10-50.050.5163LT-D-D15L200.51300002.5*10-70.020.220LT-D-D19L2512250005.8*10-70.050.529LT-D-D25L301.53180001.8*10-60.050.550LT-D-D30L3524160004.7*10-60.050.577LT-D-D35L4036140001.1*10-50.050.5114LT-D-D40L45612120002.3*10-50.050.5163