What is this?
Mechpocket is the shop notebook in your pocket. Machine elements, in your pocket. Pick the type, enter the size, get the standard. Copy the code for CAD and ordering.
Bearings, chain sprockets, timing pulleys, retaining rings, keys, threads and weight. Sizes follow ISO / DIN and common catalogues.
How?
Right / left hand is for one thumb. NPU, IPE and angles pick a standard section; plate and bar accept in-between sizes.
Disclaimer
Mechpocket is not a design approval, a shop or an official catalogue. Sizes, codes, loads and weights are a reference; they can vary by maker, tolerance and heat.
Weight results are estimates from density and geometry. Check the standard, the maker catalogue or a sample before you order, cut or make a safety call.
You are responsible for how you use this site. For critical work, get a qualified engineer or supplier to sign off.