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02-14-2009, 11:22 AM | #1 |
Quarry Creeper Join Date: Nov 2008 Location: London UK
Posts: 273
| Delrin rod, does it need tapping?
Hi. Having never used delvin before, I'm thinking of making my own links from some 10mm rod. I would like to know if it needs to have a thread cut into the end (tap and die), or if drilling a slightly smaller hole for the screw would be ok? Thanks in advance. Neil. |
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02-14-2009, 12:10 PM | #2 |
Rock Crawler Join Date: Apr 2008 Location: Rancho Cucamonga
Posts: 520
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Either way works. The threads will hold better though. Just make sure you use the proper # drill bit. Just a side note, 3mm is #39 or a little tighter 3/32.
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02-14-2009, 12:15 PM | #3 |
Quarry Creeper Join Date: Nov 2008 Location: London UK
Posts: 273
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You're a star, thanks for the reply... |
02-14-2009, 12:59 PM | #4 |
Rock Crawler Join Date: May 2008 Location: Mansfield, PA
Posts: 560
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I always tap my delrin links.
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02-14-2009, 02:28 PM | #5 |
Pebble Pounder Join Date: Jun 2007 Location: Harrisburg
Posts: 142
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Check out JeepinDoug. He sells a bushing that allows you to drill the hole in the center of the rod. His 3/8 bushing is about what you need for the 10mm rod. Link Drill Bushing |
02-14-2009, 05:30 PM | #6 |
Rock Crawler Join Date: Sep 2008 Location: N.E. Mpls
Posts: 854
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I generally tap about 1/2 the distance needed. Screws start easier but still have the holding power. Alot depends on the size drill you use. a few thou bigger and you wont need to tap go smaller you might need to...
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02-14-2009, 06:19 PM | #7 | |
I wanna be Dave Join Date: May 2007 Location: Taylors Falls just hanging with the MNRCRC crew.
Posts: 7,843
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Fast easy and perfect every time. | |
02-14-2009, 06:26 PM | #8 |
TEAM MODERATOR Join Date: May 2004 Location: Tennessee
Posts: 10,855
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If I have a tap handy,I'll tap them. If not,I drill a 2.5mm hole and use a 3mm bolt to form tap the threads. Forming the threads with a bolt,the bolt will thread in allot tighter,sometimes that good,sometimes it's bad. At times,I've had the hex head strip out,probably partly due to wore out hex drivers.
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02-14-2009, 06:37 PM | #9 |
Rock Crawler Join Date: Sep 2008 Location: N.E. Mpls
Posts: 854
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Each build I do gets 2 set of screws, the mock ups and then the final draft set. I have thronw out many stripped screws from raw tapping with just the screw. Just a lil bit to small of a hole and oopps stripped. So just in case I replace all screws during final reassembly. Im kinna picky. When its done I plan on going to play not repair..... |
02-14-2009, 06:45 PM | #10 |
Rock Crawler Join Date: Sep 2008 Location: N.E. Mpls
Posts: 854
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As matter og fact I try to at least tap some starting threads on my rodends helps to get them threaded straight. I can see how a few turns of the tap wont hurt,, but it has made my life easier lol |
02-14-2009, 11:16 PM | #11 |
RCC Addict Join Date: Nov 2007 Location: in the woods
Posts: 1,915
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I always tap delrin. I like being able to take things apart without cursing and throughing stuff |
02-15-2009, 12:57 AM | #12 |
RCC Addict Join Date: Jun 2007 Location: Indian Village Pontiac
Posts: 1,910
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x2 I always tap them.........
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02-15-2009, 07:15 PM | #13 |
Pebble Pounder Join Date: Jan 2008 Location: E. Concord
Posts: 179
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I tap them and sometimes ill use thread locker if its near
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02-16-2009, 02:58 AM | #14 |
Quarry Creeper Join Date: Nov 2008 Location: London UK
Posts: 273
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Loks like I'll have to get me a tap and die set. Would this one be ok? http://cgi.ebay.co.uk/20-PC-TAP-AND-...3A1|240%3A1318 ***Edit, just bought this one.... http://cgi.ebay.co.uk/ws/eBayISAPI.d...MEWA:IT&ih=001 Last edited by Neeley; 02-16-2009 at 03:25 AM. |
02-17-2009, 07:45 AM | #15 | |
Rock Crawler Join Date: Apr 2008 Location: Lexington
Posts: 707
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02-17-2009, 01:11 PM | #16 | |
Quarry Creeper Join Date: Nov 2008 Location: London UK
Posts: 273
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Thanks Homer. It arrived today, already tapped some aluminium with success. I'll remember your oil tip for next time.... | |
02-26-2009, 09:50 AM | #17 | |
Rock Stacker Join Date: Aug 2008 Location: BC Canada
Posts: 69
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BTW, a longer than you need screw and a few scores with a cutting disk or a sharp edged file you can make a tap for those "in a pinch" moments. Use this technique lots, after I've broken my tap... | |
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