
MARTIN
Frequently asked questions
Common questions about MARTIN from 3G Electric.
What types of bore configurations are available for MARTIN chain coupling sprockets?
MARTIN chain coupling sprockets are available in two primary bore configurations: Quick Disconnect (QD) bushed and keyed bore. QD bushed sprockets, such as the 6020SK, feature a bushing system that allows for easy installation and removal, with bore diameter ranges like 1/2 to 2-5/8 in. Keyed bore sprockets, such as the 6020 x 2-1/8, have a round keyed bore with specified keyway sizes (e.g., 1/2 in x 1/4 in) for direct mounting on shafts. Both types are made of steel and are designed for hub-side mounting.
What is the purpose of MARTIN BLUE-FLEX grid coupling seal kits?
MARTIN BLUE-FLEX grid coupling seal kits are designed to reduce vibration and cushion shock loads in power transmission systems. They are used with grid couplings, such as the 1040T size, to protect driven and driving equipment components from sudden torque spikes. The seals are horizontal and fit hub diameters like 2-1/4 in. They help extend the life of the coupling by containing lubricant and preventing contamination, making them suitable for applications with parallel misalignment.
What materials are MARTIN coupling hubs and sprockets made from?
MARTIN coupling hubs and sprockets are constructed from steel, as indicated in product specifications for items like the 6020SK and 1120T-SH. Steel provides high tensile strength and wear resistance, making these components suitable for industrial environments with heavy loads and continuous operation. The material choice ensures durability in applications such as conveyor drives and pump systems.
What is the maximum bore diameter available for MARTIN keyed bore chain coupling sprockets?
Based on the product range, MARTIN keyed bore chain coupling sprockets are available with bore diameters up to 3-7/8 in, as seen in the 10018 x 2-7/16 model. This sprocket has a round keyed bore with a 5/8 in x 5/16 in keyway size. Smaller sizes include 1-5/16 in for hub size 40 and 1-11/16 in for hub size 50. The bore diameter is specified for each hub size and tooth count.
What is the rated speed for MARTIN plain bore grid coupling shaft hubs?
MARTIN plain bore grid coupling shaft hubs, such as the 1120T-SH, are rated for a maximum speed of 2,025 RPM. This rating is specified for the steel hub with a 12.56 in outside diameter and 2.5 in bore diameter. The speed rating is important for applications where rotational speed must be considered to avoid excessive wear or failure.
Does 3G Electric supply MARTIN products?
Yes — 3G Electric (S) Pte. Ltd. supplies MARTIN products. We stock the MARTIN catalog and supply genuine factory-original products with full manufacturer warranty and technical support.

























