FIG. 400
PRECISION FASTENERS
Machine
Keys
American-made imperial, metric, gib head and custom machine keys in a wide range of dimensions — certified to ANSI/ASME and DIN/ISO standards.
1907
Standard Steel
C-1018
Standard & barstock
Alloy Option
C-1045
And other alloys
Imperial Cert.
ANSI/ASME
All imperial keys
Metric Cert.
DIN / ISO
All metric keys
— PRODUCT CATALOG
Four Machine Key Variants
Imperial machine keys are simply machine keys that have dimensions listed in imperial units also referred to as the imperial system which was used by the British Empire and adopted by the rest of the world by the late 19th century.
For over 90 years, this standard is also known as the ANSI standard, which stands for the American National Standards Institute, and serves as coordinator of the U.S. private sector, voluntary standardization system. Finally, these machine key measurements are also known as the ASME standards from the American Society of Mechanical Engineers.
The other type of machine keys would be metric or keys that have dimensions using the metric measuring system.
Limits of variation, CL = Clearance
All dimensions given in inches.
Metric machine keys, also referred to as DIN or ISO keys, are machine keys that have metric dimension rather than imperial or English measurements so you will see millimeters instead of inches or fractions.
Metric machine keys function in the same way that other keys do. They connect a rotating machine element to a drive shaft so that torque can be transmitted.
Square Key Steel
Dimensions in millimeters.
The values of mass given in the tables have been calculated from the cross section on the basis of a specific gravity of 7,85 kg/dm3.
Rectangular and Flat-Rectangular Key Steel
Cold drawn SAE-1035 carbon steel. Available in all standard fractional and metric sizes. Tolerance: +.001 / −.000.
Diameter range
1/16″ – 1″
Tolerance
±0.0002″ ground
Finish
Polished, uncoated
Standard
ANSI B18.8.5 / ISO 8734
TYPICAL APPLICATIONS
Cold drawn SAE-1035 carbon steel. Available in all standard fractional and metric sizes. Tolerance: +.001 / −.000.
Diameter range
1/16″ – 1″
Tolerance
±0.0002″ ground
Finish
Polished, uncoated
Standard
ANSI B18.8.5 / ISO 8734
TYPICAL APPLICATIONS
Technical Overview
Trusted Machine Key
Manufacturing
Stanho offers American made imperial, metric, gib head and other custom machine keys in a wide range of dimensions to meet any of your special tolerances and requirements. Our imperial machine keys are ANSI/ASME certified. Our metric machine keys are DINS/ISO certified. Machine keys, much like woodruff keys, are used to connect a rotating machine element to a drive shaft to lock the two parts into place to enable the transmission of torque. Machine keys hold very tight tolerances, but do have a slightly different configuration from woodruff keys in that they are square and long. Machine keys with rounded ends make it easier to slide the key into the slot, therefore there is no special tooling needed.
Gib head keys, used in heavy equipment and heavy machinery, sheers and rolling mills, are also used for locating and holding things in place, but can also be used a bit differently than woodruff keys or other machine keys.
Our standard keys are furnished from C-1018 steel. “Barstock” keys are furnished from C-1018 steel at no additional cost, but must be so specified. Machine keys can be furnished in C-1045 alloy steels and other materials.
Don’t see exactly what you are looking for? Contact us today and we can meet all of your custom machine keys needs. Call us at 724.846.4660 or click here to contact us.
Machine KEY Types · 10+ Materials
Alloy Option
1/4″ to 6″ standard stock
Stainless Option
303 / 316 for corrosive environments
Custom Finish
Zinc, nickel, black oxide on request
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Need Custom Machine Keys?
Don’t see exactly what you are looking for? Contact us today — we can meet all of your custom machine key needs. Call us at 724.846.4660 or submit your print for a fast quote.