Didn't realize this was all it took to spruce up my very old Dremel. Luckily I kept the dead Dremel even though it was broken, mainly to reuse parts later, but I just didn't have time to take it apart and make sure it was a simple part. Have boxed Bosch branded parts and works like a charm and is better/smoother than the smaller branded replacement I bought for use decades ago. Including some closer photos of parts and disassembly for reference.
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