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Re: Broken Tap
开云体育JP, that is a great idea. i will see if i can adapt my gearwrench ratcheting handle to mount in the DP. Imran On Dec 14, 2020, at 8:42 AM, Jerry P <Jerry-Pac-Man@...> wrote:
?I use a hand tap wrench mounted in a drill press. After I drill the hole I mount the tap wrench.? It is not powered just a guide.? Also, tapping fluid is used. -- Jerry P Life is what happens to you when you're making other plans. "You can observe a lot by watching."? Yogi Berra |
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Re: Broken Tap
开云体育Mark, that is very useful information. the set came with drill for each tap. it is interesting, some time ago, i was measuring the nuts that the machine shop made and i found that they had over drilled. now it makes sense. also, did not have a clue regarding dia and depth ratio. as for fluid, i wetted all threads of the tap. any more it just drips. i am also using just 3 in 1 oil not cutting fluid. from your description it appears i need to use more. i guess i need to educate myself a lot more. Imran On Dec 14, 2020, at 1:18 AM, mark thomas <murkyd@...> wrote:
?That's an obvious torque failure.? There's not a single "correct" hole size for a given thread.? The size of the hole determines the "thread engagement percentage" (100% would be the hole is the same as the the outer thread diameter).? 27/64" drill yields 75% engagement, which is too tight for your application.? 50-60% thread engagement is more appropriate for steel in a 1:1 diameter/thread depth ratio, which would be a 29/64" drill.? 75% is appropriate for softer materials, shorter lengths, and machine tool threading.? Get a copy of Machinery's Handbook.? ?Also, lube/cutting fluid has a big effect when threading, did you use plenty? If you're making parts for the space shuttle or for a Felder tool, perfection of thread fit is or course critical, but for a lot of applications, looser tolerances will make threading easier and won't have any significant effect on the holding power.? Just the other day I thread some 1/2-13 holes in 3/8" HR steel and I use 7/16" drill and tap using a hand electric drill, and crank through in just a couple seconds per hole. |
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Re: Broken Tap
开云体育Thanks David. Good idea. do it commonly for holes that cannot be done in DP and need to be perfect. just did not think of doing so for tapping. Imran On Dec 13, 2020, at 11:13 PM, david@... via groups.io <david@...> wrote:
?Imran, it really helps to make a tap guide. ? See pages 222-223 in your Survival Guide. ? David Best https://www.instagram.com/davidpbest/
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Re: Broken Tap
开云体育Imran, it really helps to make a tap guide. ? See pages 222-223 in your Survival Guide. ?David Best https://www.instagram.com/davidpbest/
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Re: Incra LS fence vs. Felder rip fence for x-roll
Like Ariel, I have a few of these magnetic bases lying around the shop at each machine acting as "stops" when needed.? I use it as a "bump stop" on the KF700SP just as frequent as I use the rip fence.? Sometimes, I use 2 or 3 magnetic bases as clamps to minimize stock shifting during a cut or for odd angles.?
SW |
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Re: Broken Tap
开云体育Brian, good to know about accusize. i am very fussy about keeping tap perpendicular checking with small square as i start. with a ratcheting T wrench using both hands there should not be much leaning but i can’t say i did not cause it being new to this. Imran On Dec 13, 2020, at 8:29 PM, Brian Lamb <blamb11@...> wrote:
?Nothing wrong with Accusize tools/cutters, not the highest quality but definitely not the worst. Mostly likely from the looks of it you snapped it off from leaning. Trying to tap 1/2-13 in steel by hand is kind of not going to happen with any kind of consistency.
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Re: Incra LS fence vs. Felder rip fence for x-roll
开云体育Hi Jeff,The OP was about the parallel fence alternatives - I didn’t expect the interest in the stop setting gizmo. ?? But since you asked, here are a couple more photos of the prototype, and hopefully ?you can see that the telescoping monopod (with grip handle removed) is captivated with a slight interference fit in a U-channel routed into the plywood cover that is screwed down to the plywood base. ?That cover piece is two layers of 3/4" Applyply glued together, then routed out on one side. ?I also added some photos to this link: ?? These are the MagSwitches I used: ? ??They are pretty handy for a variety of things including holding featherboards and stops to the cast iron table, etc.. They come in a few sizes and strengths. David Best https://www.instagram.com/davidpbest/
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Broken Tap
开云体育is anyone familiar with accusize industrial tools? it is a canadian co out of toronto. i recently purchased two tap & drill sets metric and SAE. i went with them because they offered HSS at reasonable price.i used the 1/2-13 tap first time today and it broke mid way in 1/2” CR1018 steel bar. yes, i did drill 27/64” hole with the drill that came with the tap. just curious, folks with metal knowhow, can you tell if this break shows a manufacturing defect? i am sure they will send me a replacement tap but i am just wondering if i should return the set or both sets because i am not sure of the quality any more. Imran |
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Re: Bearing greas
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On Dec 13, 2020, at 3:15 PM, Howard Metz <hdmetz1960@...> wrote:
?What grease should be used in jointer bearings and shaper spindles? thanks Howard? |
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Re: Incra LS fence vs. Felder rip fence for x-roll
开云体育Parts will be available, it’s the same stuff we are using in the current manufacture. We just got in a whole bunch more of the linear rails, so we have everything on hand for any upgrades that are desired.
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Re: Incra LS fence vs. Felder rip fence for x-roll
开云体育The prototype version of my stop setter was made of wood, with magnetic latches to the case iron top. ?Over the past few years, a few people on FOG asked for the parts list and copied the design. ?So I’ll post the details below in case anyone else wants to make a version with telescoping arm. ?I was after more accuracy than can be achieved using Brian’s “from slider edge” method. ?The inner edge on all of the sliding tables I’ve owned is not a flat reference surface and thus varies by 1-2mm along it’s length. ?I build to higher standards than that even on kitchen cabinets. ?“Close enough” is not in my vocabulary. ?To each their own.This earlier implementation is based on a telescoping monopod by Manfroto - took me a while to zone in on something that was the right length, would collapse, be reasonably rigid, and off the shelf. ?I started with this: The MagSwitch units are available from a lot of sources, but Grizzly is the cheapest for the smaller version I used. ?I bought the MagSwitch #95 which is just adequate. ?I would recommend using a pair of the MagSwitch 150 units which have stronger holding power. David Best https://www.instagram.com/davidpbest/
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Re: Incra LS fence vs. Felder rip fence for x-roll
开云体育I use my parallel fences everyday, and even with my aging eyeballs I can just go to my hairline pointers on the crosscut and parallel fence and get less than .010” difference, which is generally close enough. But, if I want within a couple thousandths of an inch, I use the method shown in the video that Chris so kindly linked, either using an adjustable square off the edge of the slider (I have 12 and 18” blades), or you can use a scrap piece of stick and bring the rip fence up to snug the stick between the crosscut stop and the rip fence, then move the slider down and set the parallel fence the same way. However you do it, the results are within .002”-.004” in my experience. I find it really important when doing a stack of say 6 drawer fronts and trying to hold minimum gaps between the drawers…. if each drawer front was .010 out of parallel, you’d have a 1/16” gap or out of parallel situation in short order.
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Re: Incra LS fence vs. Felder rip fence for x-roll
开云体育You are not missing anything, my experience has been if you 0 the parallel stop to the blade by bringing it up to the tooth it’s close enough for most work but there is nothing wrong trying to be better about it, especially if you have that kind of time...Regards, Mark On Dec 13, 2020, at 1:50 PM, Chris Perren <cperren@...> wrote:
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Re: Incra LS fence vs. Felder rip fence for x-roll
开云体育How can it get any easier or reliable than the process illustrated in Brian’s video?? Just use an adjustable square.? Am I missing something?? Although I do need to upgrade my DRO Lamb parallel to the latest update. Hopefully parts are still available as I have drug my feet on doing it... ? https://www.youtube.com/watch?v=4xcjWUX4QqM ? Chris Perren ? ? ? From: [email protected] <[email protected]> On Behalf Of ahazi
Sent: Sunday, December 13, 2020 12:29 PM To: [email protected] Subject: Re: [FOG] Incra LS fence vs. Felder rip fence for x-roll ? I like David's solution for equalizing the parallel fences but I think it can be simplified by using a magnetic base to hold it to the cast iron table instead of the very accurate base that David fabricated. I also use this type of a magnet as a bump stop and it works very well. |
imran
David P. Best
