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Woodruff Keys
PRECISION FASTENERS
Woodruff
Keys
Manufacturing consistent, high-quality woodruff keys since 1907. Our unique mass-production method is faster and more efficient than traditional production — delivered on time, every time.
1907
Carbon Steel
SAE-1035
Standard grade
Alloy Steel
SAE-8630
Heat treated
Hardness
RC 40–50
Alloy keys
Standards
DIN · JIS · ISO
Metric keys
— PRODUCT CATALOG
Four Woodruff Key Variants
Stanho standard woodruff keys are machined metal fasteners used to transfer torque from a shaft to gears and function as a fail-safe device ensuring that the key breaks before the gear does; thus reducing replacement costs. Standard refers to the keys having ANSI Standard dimensions including length, height, radius and distance. The other type of keys would be metric.
Diameter range
1/16″ – 1″
Tolerance
±0.0002″ ground
Finish
Polished, uncoated
Standard
ANSI B17.2 – 1967, R1990
Stanho standard woodruff keys are machined metal fasteners used to transfer torque from a shaft to gears and function as a fail-safe device ensuring that the key breaks before the gear does; thus reducing replacement costs. Standard refers to the keys having ANSI Standard dimensions including length, height, radius and distance. The other type of keys would be metric.
All dimensions are given in inches. The key numbers indicate nominal key dimensions. The last two digits give the nominal diameter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty-seconds of an inch.
All dimensions are given in inches. The key numbers indicate nominal key dimensions. The last two digits give the nominal diameter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty-seconds of an inch. The key numbers with the -1 designation, while representing the nominal key size have a shorter lenth F and due to a greater distance below the center E are less in height than the keys of the same number without the -1 designation.
Stanho standard woodruff keys are machined metal fasteners used to transfer torque from a shaft to gears and function as a fail-safe device ensuring that the key breaks before the gear does; thus reducing replacement costs. Standard refers to the keys having ANSI Standard dimensions including length, height, radius and distance. The other type of keys would be metric.
Diameter range
1/16″ – 1″
Tolerance
±0.0002″ ground
Finish
Polished, uncoated
Standard
ANSI B17.2 – 1967, R1990
Stanho Non-Rok keys (formerly Standard Automotive keys) are specially designed woodruff keys but utilize an angled shape instead of the arch shape used in standard woodruff keys. The profile’s angles keep the key from rotating out of position, an important feature when indexing and when close tolerances are needed to be maintained.
Non-Rok keys are Standard’s own design solution to keying problems. Size standards are identical between Woodruff and Non-Rok keys. Shear strength is equal since the shear line is dimensionally equal in comparative sizes. No design changes are necessary as there is no deviation from normal slotting.
Most commercial range of steel specifications, tolerances, tempers and finishes is available. With few exceptions, Non-Rok keys may be substituted in assemblies because they are more readily installed and overcome objectionable impinging due to key rotation within the keyway. This is why many Non-Rok Woodruff keys are used in automated assemblies including automotive and outdoor power equipment applications.
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
Stanho Hi-Pro Woodruff keys are manufactured in a wide range of standard sizes. Carbon keys are normally made from cold drawn SAE-1035 steel and alloy keys normally are made from SAE 8630 steel and are heat treated to Rockwell “C” 40-50. We can also make stainless keys upon request.
These keys are designed to be inserted into a keyway of a rotating shaft and are designed to rock in the seat for adjustment to angular spines. These keys are most commonly used to secure gears to transmission shafts. The feet of the key are why they can be installed quickly and accurately, thus increasing production speed and efficiency. The feet provide restricted movement in the keyway.
Below is a technical reference chart.
Available in all standard metric sizes.
Diameter range
4 – 38mm
Tolerance
±0.0002″ ground
Finish
Polished, uncoated
Standard
ANSI B18.8.5 / ISO 8734
Technical Overview
Trusted Woodruff Key
Manufacturing
Standard Horse Nail has been making consistent and high quality woodruff keys since 1907. Our unique method of mass production is faster and more efficient than any other traditional production method. We are a tier 1 automotive supplier and are TS16949 ISO 9001-2008 certified. We offer standard, non-rok, hi-pro and metric woodruff keys. All of our keys make it to our customers stress free. You buy it, we ship it, on time and accurately.
Our keys are machined metal fasteners used to transfer torque from a shaft to gears where tight tolerances and functionality are vital. They are precisely a fail-safe device to ensure that the key breaks before the gears do, cutting replacement costs down significantly. Woodruff keys are used in a variety of applications including, lawn and garden equipment, automobiles, trucks, pumps, electric motors, agricultural equipment and other heavy equipment. They are used more often than machine keys in automated assemblies, such as automotive, because they are easier to feed and maintain tight tolerances. No matter the application though, the key’s job is the same, to transfer the torque by locking the gears into the crank shaft.
Stanho imperial keys are made in all standard sizes. Carbon steel woodruff keys are made from cold drawn SAE-1035 steel. Alloy woodruff keys normally are made from SAE-8630 steel. Alloy keys are heat treated to Rockwell “C” 40-50. Stainless keys are also available in standard 316 Stainless Steel. Thickness Tolerance – Fractional Size to plus .001 minus 000. Special sizes, types of materials and heat treatments are available.
Standard metric woodruff keys are provided in SAE 1045 steel and are manufactured to the DIN, JIS, EN and ISO standards. As with all of our standard imperial woodruff keys, special materials, treatments and sizes can be quoted per your print.
4+
WOODRUFF KEY Types · 10+ Materials
Ground Tolerance
±0.0002″ OD max deviation
Length Range
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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Woodruff Keys?
For more information about Stanho’s woodruff keys, call us at 724.846.4660 or submit a request for quotation online. We ship on time, accurately — every time.