Thanks for that, Nick. I don't think we ever had any formal roll-pin punches in the machine shop where I worked. We made do with ordinary pin punches and likely never knew such fancy punches existed. :)
I think you're correct on it being a roll-pin. I should never even try to trust my memory from that long ago! Thanks, Barry - N4BUQ > .062/.065 is probably a tolerance as the parts list is for a mil-spec > MS171434 cylindrical 3/8 x 1/16 slotted pin > https://www.huyett.com/ms171434 > You should be able to drive it out with Kroil and a 1/16 roll pin punch. > > It is a good day -- I learned something new - roll pin punches vs. pin > punches > found in a machinist forum on line - > "Roll pin punches are just like pin punches, but have a small projection on > the center of the end to keep them from sliding off the end of the pin and > are a couple of thousandths smaller than the nominal pin size so they will > not bind in the hole." > https://www.mcmaster.com/roll-pin-punches/ > https://www.mcmaster.com/mvD/Library/M3/20230328/DDA71A01/3421A33_Pin-Removal%20Punch%20for%20Hollow%20and%20Spring%20Pins.PDF > > My motto - "It is a damn poor job that doesn't require at least one new > tool." > > ------------------- > Slotted Spring Pin 1/16" x 3/8" Standard Duty 410/420 Stainless Steel > Passivated MS171434 > > • 410/420 are both martensitic stainless steel with moderate chromium > contents of 11.5 to 13.5% and 12 to 14%, and carbon levels of .08 to .15% > and .30 to .40% > • A passivated part is one that has been chemically treated to help reduce > its ability to react to exposure and corrode > • Stainless steel contains more than 11% chromium, resists corrosion, > maintains its strength at high temperatures, and is easily maintained > • Stainless steel is strong, durable, and corrosion resistant > • Slotted spring pins are hollow, cylindrical tube-style press fit > fasteners with chamfered ends that are lighter, cheaper, and easier to > install than solid pins > • Commonly used as locking devises, positioning points, anti-chafing > surfaces, shafts, or sleeves for wiring > ---------------------------------- > > Nick England K4NYW > www.navy-radio.com > > > On Thu, Sep 12, 2024 at 8:04 AM Jordan Arndt <[email protected]> wrote: > >> Thanks Nick for that information...I'll be reviewing it as time allows. >> >> One question of the bat however...The roll pin diameter dimension is shown >> as .062/.065. Is this a tolerance allowance or does it indicate that the >> pin itself is tapered...? >> >> Tapering of the pin may explain at least some of the difficulties I've had >> removing the pin.. >> >> Thanks again an VY 73...Jordan VE6ZT >> >> ----- Original Message ----- >> *From:* Nick England <[email protected]> >> *To:* Jordan Arndt <[email protected]> ; Collins R-390 HF Receiver List >> <[email protected]> >> *Sent:* Thursday, September 12, 2024 5:49 AM >> *Subject:* Antenna trimmer drawings >> >> Oh, I created an actual searchable index to the drawings here >> https://www.navy-radio.com/rcvrs/r390a/drawings.htm >> >> A quick search for “trimmer” shows this assembly drawing >> >> https://www.navy-radio.com/rcvrs/r390a/drawings/17310-05/05-95-SM-C-248962-TRIMMER%20ASSY%20-%20R.F..pdf >> >> It references this capacitor drawing >> >> https://www.navy-radio.com/rcvrs/r390a/drawings/17310-04/04-80-SM-B-283234-CAPACITOR,%20VARIABLE.pdf >> >> There are also 3 other detail drawings showing shaft, bracket, and shield >> >> Nick England K4NYW >> www.navy-radio.com >> >> On Thu, Sep 12, 2024 at 6:29 AM Jordan Arndt <[email protected]> wrote: >> >>> I am currently dealing with serious family issues leaving little time for >>> anything else, but I was wondering of anyone has found, or knows if those >>> drawing files contain any info regarding the Ant Trim assembly..? >>> >>> Given that the assembly appears to have been provided as a complete unit >>> to >>> production, there might not be drawings regarding the assembly, but I >>> currently do not have time to investigate the now available drawings. >>> >>> Since I have been unable to fully disassemble the Ant Trim assembly >>> because >>> I've been unable to remove the roll pin, I need to know what is inside >>> the >>> assembly for spacers and if there might be a phenolic centering bushing >>> on >>> the inside of the assembly... >>> >>> Any info would be greatly appreciated... >>> >>> 73...Jordan VE6ZT >>> >>> ----- Original Message ----- >>> From: "Glenn Little WB4UIV" <[email protected]> >>> To: "jkharvie" <[email protected]>; <[email protected]> >>> Sent: Wednesday, September 11, 2024 8:19 PM >>> Subject: Re: [R-390] Meter Gaskets? >>> >>> >>> > Tom M located the drawing package and they are hosted by Nick England. >>> > The package appears very complete. >>> > You could come close to building a R390A from the package. >>> > >>> > I just forwarded the information. >>> > >>> > >>> > The pdf version of all 1000 drawings are now posted here - >>> > https://www.navy-radio.com/rcvrs/r390a/drawings/ >>> > The categories are ones Tom used as labels >>> > >>> > Glenn >> >> >> >>> > ______________________________________________________________ > R-390 mailing list > Home: http://mailman.qth.net/mailman/listinfo/r-390 > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
