Rick, I like your posts most of the time because they offer abstract ways of seeing things, and often are somewhat humorous. Sometimes they even make sense if you don't think about it. But your last post makes my head hurt.
Installing ferrules before turning shafts is better because you have a rear chuck and live center to eliminate deflection when cutting the tenon? And it saves time? That makes as much sense as saying that you sleep less on full moon nights because gravity has less impact on your body during that period, thus eliminating the need for a full 8 hrs. of sleep.
Seriously, installing ferrules takes the same amount of time no matter when you do it. And if you are experiencing deflection when cutting tenons, that you need a live center to hold it on center, something is seriously wrong. Ironically, you mention having trouble with deflection cutting ferrule tenons, but in the same post boast how you hog cue butts down from 1.375" to .040" over finish size in ten minutes. You claim you build a P/J in ten hours, breaking down how fast you do everything, but make no mention of how long you spend making rings. Exactly how long does it take you to make those box veneer style rings to match a cue? Or is that not included in your 10 hr. cue?
I know you catch a lot of crap from folks on the forum here. I'm not here to pick on you. But posts like this make it easy to understand why people jerk your chain. Sometimes I wonder if you just make stuff up as you are writing it.
Hi Eric, fair enough questions,
I assure you, I don't make anything up in a pre concieved notion or on the fly. I am as serious as a heart attack about my cue making and see no reason not to raise the bar of expectation and reach for the highest apple on the tree.
On the ferrule issue, I cut my tenons at a 1.5" length so they clear the apex of my saw teeth after the pass while accomodating the correct spring pressure for the 30" length after I install my pin device. Over time I have learned that even with the 1" tenon there is a deflection factor on the tenon from tool pressure during single point cutting.
Tool pressure deflection increases very much as you increase the tenon's length and I found this out by noticing that when the saw got to cutting the pre installed ferrule the initial cuts where some times eccentric to the wood a little. By holding the shaft in three places with the live center on the end, the dimensional stability of the tenon is always perfect with the chuck when fitting the .308 ID to the wood for my standard glue gap interference and eccentricity disappeared, poof! Example of root cause analysis, corrective actions and lessons learned.
After learning this little ditty, I would never do a ferrule any other way. Not being and experienced machinist I have to learn by observing and knocking my head against the wall sometimes. But like my father used to say, " you throw enough crap against the wall, some of it is has to stick".
I don't thread or cap my ferrules, only file 7 v-groove keyways for the glue foundation. After discovering how much better the fit was with the live center I just thought I would share it with the other anal cuemakers out there like me. It does make a big difference IMHO. Maybe my explanation was a little vague so hence the long winded post.
By installing the ferrule first I eliminate all of the machining attention having to cut it and blend it. I have been doing a lot of cue repair for many years at my pool hall and saving that machining time adds up and now my automated saw machine cuts the ferrule on my new shafts and I only spend 20 seconds to lightly sand in the slightly over sized maple shaft at the interface.
Next time you put on a ferrule clock the time you cut the tenon and do the glue up, then clock the time you take to machine it and sand. IMO this is a critical job and is one of the first areas a new cue owner goes to with is fingers and brain to inspect your handy work. Because you have to sneak up on the face area I would think that most people would start taking their time and slow down to make that perfect transition and then sand carefully as the materials have different densities. Excessive heat build up for single pointing and sand blending is the primary reason you get wood shrinkage in that zone down the road even after final sanding and sealing. The less time spent with the less molecules moving around with heat, the better! Nature always wants to equalize things that have differential, if your don't stress or put them out of whack in the first place you are ahead of the game. Less is always more the way I see it.
After my glue cures I let the machine do the work and I get the added feature of a ferrule that follows the contour of my shaft taper with very little heat. Because the ferrule is harder and machines truer than the wood, the wood is slightly higher than the ferrule at the transition. Just sand the ferule to remove facets and blend very quickly. This was the way Omega DPK did it and I defiantly am a groupie of that discipline.
From those lessons learned, when I do ferrule replacement I also center drill the end of the faced ferrule with a tiny # 1 CD and use a live center and I found that the RMS finish to the ferrule is better and very tidy that way when single pointing. Less sanding and easier blending equals less time and a more uniform and repeatable job across the board no matter who's hands are sanding it. The TRO on my 6 jaw is a 1/4 thou so there is not a problem. I just like to pay close attention to detail and get excited at even the slightest incremental advantage attained.
I stated in both my posts that the time element did not include ring billet building or the parting of individual decor rings. You and I both know the time factor there for building, drilling and parting rings, making billets blanks, gluing, stacking, drilling, facing, parting and flat sanding. Its very time consuming. I did study the time element in this area but alas I have no records on file because it translated into standard fees of 250.00 for non ivory box veneer rings and 200.00 for 30 stitch silver in 5 positions including shafts. Having a dedicated set up for indexing and stitching rings does cut down on set up time.
BTW, thanks for not attacking me about hogging my baseball bats down real fast. You pointed out that disagreement in a very respectful manner and as always I appreciate the candor in your posts. I have only been building cues for about seven years before going full time and without boasting I think I can perform an A-Joint machining and joining as good as anyone with my tapered collets. Even with taking the time to do a lot of cuts over time and looking for movement and marking each piece to look for stability it still comes down to a crap shoot in the long run if the handle or fore arm will move down the road. This building technique of joining has what we called in the marine industry, a level of uncertainty. i don't like uncertainty in any shape or form and at 57 years of age I don't want to take umteen million passes on a piece of wood before I can do the deed. Life is too short for that IMO.
I am certainly not a pathfinder in "full coring" a cue as many other cue makers were doing it long before I came along. However, I do feel that the construction is more in tuned to natures way of building things. Most organic things have structure and that structure is intertwined on a skeleton or foundation most of the time. It makes a lot of sense to me that having a PH or Maple dowel serving in this function and using gap filling expanding Poly glue with a 2000 year chemical half life is the tits.
I have only built about 130 cues so far and for the last 80 or so I have been full cored and I know every person who owns them and not one has moved. By inspecting and tracking these cues I have learned that I can take .050 passes to .040 over finish and not create downstream movement problems what so ever. Experience has been my best teacher and process control observations have given me numbers that can't be denied. Sharing this info here is my pleasure. Those who don't read and process this info miss the free lunch as I have spent hundreds of hours in this endeavor contemplating my naval.
I have even gone so far as to mistreat wood by leaning squares up against outside walls in the winter for months and then built cues and sent them into the field like a weather balloon. Because I gave away a boat load of cues to my league players and friends for feedback and testing, I never put my brand at risk. Who is going to piss on your reputation when they are told in advance that they are being given a free cue to help me track field observations for quality control. They feel like test pilots who are helping me out.
I have not sold more than a few cues on a national level and don't advertise yet but when I do, I am absolutely sure the rework problems after the sale will not be a problem. I am not going to ship chipped or rusted sanding mandrels! LOL :deadhorse:
I don't mind getting crap and I don't like change for change sake. If one takes a questioning attitude and strives to raise the bar of expectations it always lies in the minutia of the details. Within the creative environment, very small incremental changes from the norm or conventional standards can produce progress in a positive direction. Experimental airplanes can crash also so you must verify everything and always keep a watchful eye even on things that seem to be iron clad. This is basic logic and a to argue with it makes Aristotle ( the father of logic in western civilization) of turn over in his grave.
Rick
Pre installed ferrule on a 1.5 inch tenon to accomadate the preset spring pressure engineered into my machine and also cutter clearance. Also adding my pin concentricity tool driver requires this length adjustment, hence my discovery of the importance of end concentricity using a 3rd holding point, the live center during tenon cutting.
These 5 point cues with 4 veneers and rings in 5 positions are ready for sanding and are not 10 hour cues! ( they take at least another 20 minutes, LOL ) I did time studies of ring billet production but factored them down to cost point and can't see the hours at this time. I will have to do them again. The dog ate my homework.:help: