Metal Locking Service Inc. specializes in emergency cast iron repair and on-site field machining.  Founded in 1942, we are proud to be the oldest cast iron repair company in the world, and please view our entire site to see why we are also the best!

We employ a precise, mechanical method for making permanent Cast Iron Repair without welding, brazing or applied heat of any kind.  Our cast iron repair technique is also known as: metal locking, metal stitch, metal stitching, metalock, metalace, cast iron stitching and cast iron crack repair. 

Our in-situ, On-site Machining services include: milling, line boring, journal turning, flange facing, valve boring, cylinder honing, beveling, parting, keyway cutting, heat-treating and stress relieving.

We offer around-the-clock on-site (onsite) and in-situ (insitu) cast iron repair and field machining services throughout the world.  We value the recommendation and endorsement of equipment manufacturers, insurance underwriters and inspection services alike.

Metal Locking Service is proud to be based in the great city of Buffalo, New York (USA).