Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,421 pages of information and 230,040 images on early companies, their products and the people who designed and built them.
of Craiginches, Aberdeen
formerly Harpers and Co
1892 The Craiginches iron works were erected on the south bank of the Dee to meet the increasing demand for rope and belt pulleys and fly-wheels, tooth-gearing, steel shafting, bearings and their supporting fixings, and generally, all accessories required for the transmission of power.
1895 Advert. Accessories for the transmission of power. Belt and rope pulleys, gear wheels, shafting etc. 
Harper's developed an important line of business in wire fencing and fencing posts. This led them to develop iron suspension footbridges, and in a period of over 30 years they produced many such bridges for the UK and overseas. An excellent history of the company, with the main focus on their suspension bridges, was published by Douglas Harper in 2015