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The BOSTITCH 9r200639 is a replacement bumper designed to absorb impact energy at the end of the driver stroke in pneumatic and cordless nailers and staplers. The bumper sits at the base of the driver cylinder and prevents metal-to-metal contact when the driver blade reaches the bottom of its travel. Over time, bumpers degrade from repeated impact and require replacement to maintain consistent drive depth and protect internal components. This part is installed by HVAC technicians, contractors, and tool service professionals performing routine maintenance or field repairs on BOSTITCH fastening tools.
This bumper is suited for use in construction, framing, finish work, and mechanical trade applications where BOSTITCH pneumatic or cordless nailers and staplers are standard equipment. Bumper replacement is a common preventive maintenance task performed when tools begin exhibiting inconsistent nail drive depth, increased noise at the end of stroke, or visible wear on the driver assembly. Replacing the bumper restores proper tool operation without requiring a full driver rebuild.
Designed as an OEM-style replacement bumper for BOSTITCH fastening tools. Confirm fitment against your specific tool model number before ordering.
Bumper replacement should be performed by a qualified tool technician or service professional. Disconnect all air supply lines and remove the fastener magazine before disassembling the driver housing. Follow BOSTITCH service documentation for proper driver cylinder access and bumper seating procedures. Inspect the driver blade and cylinder bore for additional wear while the tool is open.
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