{"product_id":"bartell-10609-woodruff-key-1-4-21-oem-replacement-part","title":"Bartell 10609 Woodruff Key 1\/4\" #21 - OEM Replacement Part","description":"\u003cp\u003eA Woodruff key locks the rotating components of a walk-behind power trowel's drivetrain in precise rotational alignment, preventing slippage between the shaft and hub that would otherwise cause erratic blade pitch control, premature wear, or loss of drive engagement. When a trowel shows signs of shaft slippage, inconsistent rotor response, or visible play between mating components, the Woodruff key is a primary diagnostic target and a required replacement before returning the machine to service.\u003c\/p\u003e\u003cp\u003eThis 1\/4\" #21 Woodruff key is the correct OEM specification for the B446 and B446 MEGA-T walk-behind trowels. The half-moon profile of the #21 Woodruff key seats precisely into the milled keyway on the shaft, providing a reliable mechanical connection under the cyclic torsional loads generated during finishing operations. Using the correct key size is critical, an undersized or oversized key will fail to transmit torque properly and can damage the keyway, leading to costly shaft or hub replacement. Always inspect the keyway for deformation or rounding when replacing this component, and replace the key any time the drivetrain is disassembled.\u003c\/p\u003e\u003cp\u003eCompatible with the following Bartell Global walk-behind trowel models:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eB446\u003c\/li\u003e\n\u003cli\u003eB446 MEGA-T\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eGenuine Bartell Global OEM part, sold by an authorized dealer.\u003c\/p\u003e","brand":"Bartell","offers":[{"title":"Default Title","offer_id":43412750270512,"sku":"10609","price":39.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/6574\/7248\/files\/10609.jpg?v=1784312994","url":"https:\/\/cce-industries.com\/products\/bartell-10609-woodruff-key-1-4-21-oem-replacement-part","provider":"CCE Industries","version":"1.0","type":"link"}