Purpose of a Flanged bush Purpose of a Flanged bush anurag2801 (Aerospace) (OP) 1 Mar 18 15:47 Can someone help understand the difference between a sleeve and flanged bush? What is the use of a flanged bush and this effect be achieved by some other means? RE: Purpose of a Flanged bush MintJulep (Mechanical) 1 Mar 18 15:55 Well, a flanged bush(ing) has a flange. A sleeve doesn't. Of course these are colloquial terms, that have not inherent specific meaning. A sketch would aid discussion. But for example, a flanged bushing can support axial loads while a sleeve should not. RE: Purpose of a Flanged bush rb1957 (Aerospace) 1 Mar 18 16:01 i think the main function of the flange is to act like a washer, secondary function is to help locate the bushing. another day in paradise, or is paradise one day closer ? RE: Purpose of a Flanged bush btrueblood (Mechanical) 1 Mar 18 16:16 And keep it from falling out on at least one side. RE: Purpose of a Flanged bush Tmoose (Mechanical) 1 Mar 18 17:26 http://www.aismn.com/wp-content/uploads/2017/08/Dr... RE: Purpose of a Flanged bush WKTaylor (Aeronautics) 1 Mar 18 18:20 also... The effective bore/bearing-length of an unmodified flanged bushing... for the same shank length and nominal small standard chamfers... is lightly longer. As noted, the most common purpose for flat surfaces of the flange is an integral 'plain washer-bearing' to avoid superficial fretting on mating surfaces. Also, Some flanged-bushes are installed with deliberately 'thick' flanges... which are subsequently machined simultaneously using rigid sets of milling-cutters to ensure ultra precise side-to-side positioning, face-to-face spacing and parallel surfaces. In some cases I have see 'flat thick flanges' recessed in spot-faces [counter-bores]. Flanged bushes can also have 'countersunk-flanges'... 90, 100, 120, 130, etc countersink angles... and the top of the bush flange may be set flush-to-high with the surface. Regards, Wil Taylor o Trust - But Verify! o We believe to be true what we prefer to be true. [Unknown] o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase] o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum] RE: Purpose of a Flanged bush SparWeb (Aerospace) 1 Mar 18 20:11 Quote (WKTaylor) integral 'plain washer-bearing' to avoid superficial fretting on mating surfaces. ...including joints that experience rotation. STF RE: Purpose of a Flanged bush 2 GregLocock (Automotive) 1 Mar 18 21:20 From an assembly point of view a flanged bush is much easier to deal with, just push it in until it stops moving! Of course a wily designer will specify that an unflanged bush should be pushed in until the end of the outer sleeve is flush with the surrounding part, but that is not quite as robust. So far as the bush manufacturer is concerned an unflanged bush is cheaper as it can be sized in a continuous die, whereas a flanged bush has to be sized either internally or in a closed ended operation. Sizing is the process of plastically deforming the outer sleeve so that that the rubber is all in compression, which is essential for durability. Some bushes are sized during installation, I don't like that. Cheers Greg Locock New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm? RE: Purpose of a Flanged bush SAITAETGrad (Aeronautics) 7 Mar 18 02:57 A flange also can tighten a gap to reduce fastener bending.