Jaw width).Twist Drill Bits DIY Precision Pin Vise Model Hobby Small Alloy Hand Drill. Model AA-Z6958 - jaw clamp for 6' calipers (.133' max. Clamps can be used by themselves for measuring thickness of paper, plastic, etc. All standard 4-48 thread indicator points fit into the clamps. Jaw clamps allow you to turn your electronic or dial caliper into a thickness gage, depth gage, or other special purpose tool.
Accurate 4 Jaw Pin Vise How To Achieve Proper
TLT/SP-125 5 Jaw Width 1-3/4 Jaw Depth 3-Axis Precision Tilting Vise.Some many months ago, before I got actively back into the metalworking hobby, I read an article on the web, probably on a personal website, that described and demonstrated how to achieve proper alignment of a milling vise on the milling machine table so that the vise jaws were accurately aligned with the movement of the table by the use of a key installed on its base.In a nutshell… a plate is created with a thickness is exactly the width of the t-slots in the mill table. It revolves 360º horizontally with 3 inch graduation engraved and +/-45º vertical with 3 Equipped with a rotating cap, the 4-In-1 Pin Vise is ideal for precision drilling. The two part components are a precision vise and a swivel angle plate base.
Probably do as well as any keyed system, outside a precision tool room, can do.If you need to adjust or deliberately off-set its easy to take one sleeve out.I do it the easy way by simply pulling or pushing the vice against the fixing bolts as I tighten up. To finish up he'll do some dedicated T-bolts with plain shanks where the sleeve runs sized for a nice sliding, but shake free, fit. Then he'll make the sleeves with flats exactly matching the re-cut slots with projections to fit the mill table slots. Remember a tight fitting key needs the slots super clean if it's gonna go in.You can make the sleeves as elaborate as you like.Inspector Meticulous will start by aligning a bar on the table, inverting the vice to grip it and cleaning the slots out to an accurate size and alignment.
Pretty well down and sinking.Usual vices are a pair of Vertex 4" x 8", the ones with the 3 position pin fixed nut, so nothing extra precision there. Doing things proper is on the "when I get some spare shop time" list. About the only concession to accuracy is to keep dedicated T-nuts and bolts for each vice. On removal and refitting typical error is a thou or so over the 4" jaw width with my usual vices.
IF you want datums like that then make a fixture plate to bolt down ON the table, you can oput 1/2-13 holes and. When I indicated the fixed jaw, it was off by six thou over six inches! All the replies so far have been really helpful.I know few people like the idea of willingly drilling holes in their mill table, but has anyone ever used locating pins to do align a vise? I would think that the repeatability would be excellent, so long as you can accurately put the holes where they need to be.I would never ever ever drill holes in my milling machine table. Got a new kurt clone, milled some keys to fit the slots on the underside, and bolted it down.
Next, I snug up the right hand nut just a bit with the wrench. I then put in both studs and tighten the nuts finger tight. That gets me pretty close, usually within 5 thou. I use my thumbs to feel when both sides are in alignment.
So, with my vise, if I have 0.005” on the indicator to start with, I tap on the vise until it’s 0.001”. Experience will tell you how much of the indicated error you need to take out with my favorite vise it’s about 80%, but this will depend on the geometric relationship between the bolts and the fixed jaw. The vise will tend to rotate about the right-hand bolt, so you are actually moving both ends of the fixed jaw, but the left end moves more than the right. I then gently tap the side of the vise nearest me, to take out most of the indicated error. Next I traverse the table so the indicator is at the left end of the jaw and note the indicator reading.
Those extra couple minutes can save hours in scrap, inspection, and re-setting up. You may have +/-.005 on this part, but the next part you may have +/-.0003, and why shoot yourself in the foot right off the start.So I will always say the best way, is take the time and slap that tenth indicator in the spindle and get it to Zero. Well I always ask, what about the next job that comes in this machine,(working in precision job shops). It may take me a couple minutes to do it, but once that vise is dialed in to Zero, it saves me hours later having to try to re-indicate it in after I made a bad part because of it.Through my years as a foreman, it would drive me crazy when guys would have issues and it comes down to the vise on being straight, and you hear the "It's good enough for this job".
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