Midwest Fasteners Square Profile Shaft Machine Key

Midwest Fasteners Square Profile Shaft Machine Key

Midwest Fasteners offers a family of square machine keys available in widths from 1/8" to 1/2" and lengths from 1" to 2", so maintenance techs and fabricators can select the exact keystock that matches an existing shaft keyway without having to cut custom stock on site. Each key in this family shares a true square cross-section profile designed to transmit torque between a shaft and a mounted component such as a pulley, gear, coupling or sprocket. It is part of Midwest Fasteners' keys and retaining rings line, stocked for shaft repair, equipment rebuilds and OEM assembly work. Selecting the correct width and length up front helps avoid downtime from an improperly fitted key during a repair or rebuild.

Key Features

• Size Range: Square machine keys span widths from 1/8" up to 1/2", available in lengths from 1" to 2", covering common keyway sizes.
• Profile: True square machine key design engages the keyway on both the shaft and the mounted component to lock rotational movement and transmit torque.
• Product Type: Machine key, suited to replacing worn or sheared keys during shaft or coupling repair.
• Application Fit: Sized to standard keyway slots at each width and length option, reducing the need for field-cut keystock.
• Drop-In Replacement: Precision square profile sized to match original equipment keyway dimensions.
• Consistent Sizing: Each width and length option is cut to repeatable dimensions for reliable fit across OEM equipment.

Technical Specifications

• Product Type: Machine Key
• Profile: Square
• Width Range: 1/8" to 1/2"
• Length Range: 1" to 2"

Typical Applications

• Securing pulleys, gears and sprockets to drive shafts in industrial equipment.
• Shaft and coupling repair on motors, gearboxes and conveyor drives.
• Replacing a sheared or worn machine key during preventive maintenance.
• General machine shop and fabrication work requiring square keystock in a specific width and length.
• OEM assembly work where an exact keyway match is required.

Why Midwest Fasteners?

Midwest Fasteners supplies keys and retaining hardware sized to consistent, repeatable dimensions across the full 1/8" through 1/2" width range and 1" through 2" length range, so maintenance techs and fabricators can source a square machine key that matches the original equipment keyway without re-machining. Keeping this full range of common key widths and lengths in stock helps keep shaft-driven equipment running with minimal downtime, whether for a quick field repair or a planned equipment rebuild. Consistent square-profile keystock across the entire size range means techs can standardize on one trusted source for shaft key replacements.