U225X PUBLIC-SAFE CONVERSATION NOTE

RECORD: CHAT-0096
TOPIC: Bushing for Trailer Ramp
IMPORTED: 2026.04.06

This note was generated from a matching conversation in the supplied ChatGPT export.
EXTRACTED REQUEST: This guy is wanting a bushing .6875 outside diameter and .625 inside diameter and 2 inches ling for this purpose I would be using it as a wear bushing over a bolt on an aluminum trailer folding ramp.

RECOVERED CONVERSATION EXCERPTS
USER MESSAGES:
1. This guy is wanting a bushing .6875 outside diameter and .625 inside diameter and 2 inches ling for this purpose I would be using it as a wear bushing over a bolt on an aluminum trailer folding ramp.
2. This is a question asked on one of my sleeve bushing ebay postings for 3d printed parts
3. This is where it is going I guess

ASSISTANT RESPONSES:
1. That would be a very thin-wall bushing. Your sizes give: - OD = 0.6875" - ID = 0.625" - Wall thickness = (0.6875 - 0.625) / 2 = 0.03125" - So that is only 1/32" wall For a 2" long wear bushing over a bolt on a folding aluminum trailer ramp, here’s the honest take: What that means A 1/32" wall bushing is pretty light for a wear point, especially if: - the ramp has any side-load - the bolt is not perfectly aligned - the joint sees bouncing/vibration going down the road - the ramp gets slammed open/closed It can work if the load is mostly just a pivot with good alignment, but it is not what I’d call a heavy-duty wear bushing. My concern That thin wall can: - deform during install - split if pressed too aggressive…
2. Here’s a good reply you can send on eBay: :::writing{variant="chat_message" id="18427"} Yes, I can make that size: .6875" OD x .625" ID x 2.00" long. Just a heads-up, that only leaves about 1/32" wall thickness, so for a wear bushing on a folding aluminum trailer ramp, it would be a fairly thin sleeve. A printed bushing can work for light-duty use or as a replaceable wear liner, but in a high-load pivot point with vibration and side load, wear life may be limited. If you want, I can still make it in that size, and I’d recommend a tougher material such as PETG or nylon depending on your setup. If you have room for a slightly larger outside diameter, that would make it more durable. ::: A shorter version if you…
3. Ah yeah—that picture helps a lot. That’s a hinge pivot on an aluminum ramp, and it’s definitely seeing: - shear load from the ramp weight - shock load when it drops - some side load/misalignment - plus road vibration + grit So here’s the straight truth (the kind you’d tell a customer without scaring them off): What your part will actually be doing That bushing isn’t just a “wear sleeve”—it’s basically acting as the bearing surface for the hinge. With that 1/32" wall, in a printed plastic, it will: - work for a while - but wear faster than a metal or thicker bushing - possibly oval out over time BUT… Because it’s: - long (2") - fully supported in that boss - and likely a relatively slow-moving pivot …it can sti…

EXTRACTED KNOWLEDGE / HOW-TO
- OD = 0.6875"
- ID = 0.625"
- Wall thickness = (0.6875 - 0.625) / 2 = 0.03125"
- So that is only 1/32" wall
- the ramp has any side-load
- the bolt is not perfectly aligned
- the joint sees bouncing/vibration going down the road
- the ramp gets slammed open/closed
CONVERSATION SHAPE: 3 user turns / 3 assistant turns
ATTACHMENTS DETECTED: 10

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