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Plate Joiner Blade 4 inch Replacement Blade is a joiner blade designed by Porter Cable Corporation for biscuit and plate joining work. The 4 inch diameter blade matches the cutting geometry needed for standard biscuit slots, so cuts track the intended joint layout across multiple parts. The blade uses a 7/8 inch arbor hole, allowing it to mount securely on plate joiners built around that spindle size and run true during extended cutting. Six strong carbide teeth form the cutting edge, so each pass removes material efficiently while holding a consistent profile over many joints. This design serves as a direct replacement blade, so it restores cutting performance when an original blade on a Porter Cable joiner is worn or damaged. The blade can be re sharpened, which extends its usable life in the shop and helps stabilize consumable costs on recurring biscuit joinery projects.
This joiner blade is specified as a replacement blade for PORTER-CABLE model 557, so its dimensions and arbor hole are set up for that plate joiner and selected related Porter Cable tools. The 7/8 inch arbor hole provides the interface between blade and machine, so once the original blade is removed, this blade mounts in the same position and runs along the same cutting path. Because the blade has a 4 inch diameter, the cutting depth and projection are matched to the machine's existing guards and fences, keeping the working relationship between blade and reference surfaces consistent with the original setup. The blade affixes and detaches with minimal effort, so blade changeover time stays short, and the joiner can move from a dull blade back to a sharp cutting edge without extended downtime on site or in the shop.
This joiner blade is identified as a replacement blade for PORTER-CABLE model 557 and fits various PORTER-CABLE models, placing it directly in workflows built around Porter Cable plate joiners. In biscuit joinery, the 4 inch diameter works with the tool's plunge mechanism to form standard biscuit slots, so slots align with factory biscuit dimensions and assembly goes together as expected. The six strong carbide teeth are arranged to cut reliably, so each plunge can remove the material needed for a biscuit without repeated passes, useful when cutting a sequence of slots along long cabinet parts or panels. Because the blade is an O.E.M. authorized part, its profile and mounting arrangement follow the original engineering of the tool, which helps preserve the feel and accuracy users are accustomed to when plunging into edges or faces. The blade's role as a plate joiner blade places it in typical furniture, cabinet, and casework joining tasks where biscuit-based alignment and reinforcement are part of the build.
The six strong carbide teeth on this blade provide a durable cutting edge, so the profile of the cut stays more consistent across many biscuit slots than it would with non-carbide teeth of similar size. Carbide construction supports longer intervals between sharpenings, which helps maintain a familiar feed rate and slot finish through extended use. When the edge eventually dulls, the blade can be re sharpened, so shops can restore cutting performance on the same body instead of discarding it immediately, which supports a more predictable maintenance rhythm around joinery tooling. The 7/8 inch arbor hole tightly defines the connection to the joiner, so the blade centers accurately and rotates with less tendency toward wobble, contributing to slot alignment and joint fit. As a 4 inch diameter blade designed as an O.E.M. authorized part, it preserves the relationship between blade, fence, and depth settings that users dial in on PORTER-CABLE model 557 and other compatible Porter Cable joiners.
The Plate Joiner Blade 4 inch Replacement Blade is described as a replacement blade for PORTER-CABLE model 557, so it is intended to take over the cutting role from the original blade on that joiner.
The 4 inch diameter blade is noted for rapid cutting of standard biscuit slots, so plunge depth and slot geometry align with typical biscuit joinery setups on compatible Porter Cable tools.
The 7/8 inch arbor hole matches the specified arbor size for this blade, so it seats properly on joiners designed for that spindle, supporting accurate rotation and slot alignment.
Six strong carbide teeth give the blade a durable cutting edge, so it can deliver reliable, consistent cuts with every pass over many biscuit slots before sharpening is needed.
The Porter Cable Corporation blade is described as re sharpenable, so grinding the teeth back to a keen edge can extend its working life in ongoing biscuit joinery tasks.
Being an O.E.M. authorized part means the blade follows Porter Cable specifications, so its fit and cutting behavior align with various PORTER-CABLE models designed around this blade style.
This joiner blade from Porter Cable Corporation is identified as a replacement blade for PORTER-CABLE model 557 and as an O.E.M. authorized part that fits various PORTER-CABLE models, tying it directly to plate joiners built for biscuit work. The 4 inch diameter, 7/8 inch arbor hole, and six strong carbide teeth are specified to support rapid, consistent cutting of standard biscuit slots with each plunge. For shops and installers running Porter Cable plate joiners, choosing this blade aligns joinery performance, slot geometry, and long-term re sharpenable use with the tool family already in service.