ISO 9001:2008 CertifiedLOCK-N-STITCH Inc. - CASTING Repair is Our Passion!
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Precision Metal Stitching (Metal Locking) Service

LOCK-N-STITCH Inc.'s proprietary, patented mechanical crack repair process "metal stitching" allows us to permanantly repair a crack or blow-out hole without welding. The cracked metal is replaced with special metal stitching pins that we install by drilling and tapping to draw the sides of the crack together. This results in a continuous row of interlocking stitching pins to create a strong, pressure-tight repair. To restore the casting to its original strength, we install locks across the joint line of the pins by drilling a precision hole pattern with special drill fixtures. After the hole pattern is created, the locks are driven in, pulling the repair togther even tighter.

The repaired, metal-stitched area is gas and liquid tight to create a pressure tight repair. In addition, metal stitching dampens and absorbs compression stresses. It also spreads tensile strains and distributes the load away from the original failure point, while maintaining the alignment of the original surfaces.

This metal stitching method is employed mostly on cast iron components, but it is also effective on any other machinable metal, such as ductile iron, steel, aluminum and bronze castings.

If failed weld attempts damaged the metal, a repair may be possible after the affected area has been cut out so that a new piece can be "stitched" in. We can repair components with wall thicknesses from 3/16" to 12" and have the portable machining equipment required to handle dificult machining projects.

LOCK-N-STITCH Inc. also offers in-house machining, non-destructive testing, manufacturing and thread repair services. To learn more about our metal stitching services, please see the attached Portfolio of repairs we have completed or contact us directly with information about your damaged parts.

Metal Stitching Capabilities

Where
In-house or On-site
Process
Drilling
Cutting/Patching (If Necessary)
Tapping
Install Pins/Install Locks
Grinding
Machining
Material Thickness
Min 3/16" to 12"
Materials Stitched
Gray Cast Iron
Ductile Iron
Carbon Steels-Annealed
Aluminum
Bronze
Advantages
Permanent repair of cracks and holes
On site repair withj little or no disassembly
Cold process
Restores broken part to original strength
Gas &Liquid tight
High Pressure seal
Benefits of Metal Stitching
Dampens and absorbs compression stresses
Spreads Tensile Strains
Distributes Load Away from failure Point
Maintains Alignment of Original Surfaces
Industry Focus
Agricultural
Architectural Castings
Automotive
Construction
Gas Compression
Internal Combustion Engines
Machine Tools
Manufacturing
Marine
Metal Working
Mining
Petrochemical refining Power Generation
Railroad
Shipping
Transportation
Trucking
Intended Application
Automotive Engines
  • High Performance
  • Antique
Compressors
Ship Engines
Diesel Engines
Earth Moving Equipment
Architectural Castings
Gears
Kilns
Pumps, Earthmoving Equipment Gear boxes Stamping
Presses
Stationary Engines
Turbines
Printing and embossing machinery
Areas Served
Worldwide
Additional Services
Machining
non-destructive Testing (NDT)
Manufacturing
Thread Repair
Industry Standards
ISO 9001, 2008 Certified
File Formats Accepted
Alibre Design
AutoCAD (DWG,DXF)
BMP (Bit Mapped Graphics)
GIF (Graphics Interchange Format)
IGES (Initial Graphics Exchange Specification, ANSI file format.)
Inventor (IDW, IPT)
JPG or JPEG (Joint Photographic Experts Group)
PDF (Portable Document Format)
STEP (Standard for the Exchange of Product Model Data)
TIFF (Tagged Image File Format)

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