The Ford Barn

BRENT in 10-uh-C · 05-01-2019, 09:45 AM

Does anyone have a print that shows the correct ID for installed Spring Hanger bushings?

We have broken our drill that we used to size new bushings after installing, and before I purchase another 14.5MM drill, I want to discuss sizing.

On the A-5465 print, it shows the finish size of the shank to be 0.565"-0.570". Using a 14.5MM drill as many vendors sell gives clearance of anywhere from less than a thou. of clearance up to just under 6 thou. when using an original (-or NORS) hanger.

The new repro hangers are averaging about 0.563" in shank size -which using a 14.5MM drill (0.5708") to size the bushing leaves about an 0.008" - 0.010" of clearance if the drill actually tracks straight however we all know there is usually a couple of thou. at minimum of run-out when drilling which potentially leaves as much as 12-15 thou. of clearance. I can buy reamers in 0.5650" or 0.5660" sizes that potentially give me 0.002 - 0.003 of clearance. Is that too tight, and/or is the 10+ thou. of clearance using a drill too much??

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05-01-2019, 09:45 AM	#1
BRENT in 10-uh-C Senior Member Join Date: May 2010 Location: Eastern Tennessee Posts: 11,972	Spring Hanger (Shackle) Bushing dimensions Does anyone have a print that shows the correct ID for installed Spring Hanger bushings? We have broken our drill that we used to size new bushings after installing, and before I purchase another 14.5MM drill, I want to discuss sizing. On the A-5465 print, it shows the finish size of the shank to be 0.565"-0.570". Using a 14.5MM drill as many vendors sell gives clearance of anywhere from less than a thou. of clearance up to just under 6 thou. when using an original (-or NORS) hanger. The new repro hangers are averaging about 0.563" in shank size -which using a 14.5MM drill (0.5708") to size the bushing leaves about an 0.008" - 0.010" of clearance if the drill actually tracks straight however we all know there is usually a couple of thou. at minimum of run-out when drilling which potentially leaves as much as 12-15 thou. of clearance. I can buy reamers in 0.5650" or 0.5660" sizes that potentially give me 0.002 - 0.003 of clearance. Is that too tight, and/or is the 10+ thou. of clearance using a drill too much?? . . __________________ . BRENT in 10-uh-C . www.model-a-ford.com ...(...Finally Updated!! ) .