Changing diameter is very little faster since you must back the masters out before shifting position.Ĭapto might be a better choice if *** the tools are available.

We have a Forkhardt quick change chuck and find it to be slower to work with in some cases because we have not bought extra master jaws (very expensive). We end up with about 10 sets of chuck jaws per machine. Loosening 2 bolt and switching jaws is only a few minutes slower than the fastest quick change chuck and the jaws are less expensive. All jaws were sets for specific part diameter, and several had steps of a standard depth (1/4”). We had several sets of nuts for chuck jaws so the operator could be preparing for the next part number to be machined. We had a Wasino LJ63M mill turn for several years and used KM50 and Komet ABS drills to reduce setup time. Sandvik Coromant C4-570-3C 32 159 Capto C4 Silent Tools Boring Bar with VBMT head and C6 adapter (C6 391.02-40 040). Capto tooling systems Mechineer (Mechanical) Sandvik Coromant C4-570-3C 32 154, Capto C5 Silent Tools Boring Bar W/ DNMG Head. Even though quick change tooling can save some in setup time, the lack of rigidity can increase machining times, scrap, and tool wear to the point of costing more than changing stick tools. With that said, we use Komet ABS drills, some KM tooling and would consider Capto for some jobs. The KM50 was the least stiff and had the greatest non linear deflection. The Capto 50 did not have any low load problems but the deflection became greater as the load increased in a non linear way. of tool pressure in the X direction.Įach of the quick change tools had problems, the ABS 50 was the next most linear in deflection after an initial preload was applied, we saw ±.0005” movement with less than 50 lbs load applied initially. The most rigid tool was the 1 ½” boring bar, its deflection was linear, for each 10 lbs of load applied the deflection measurement was the same. 0001” indicator was mounted on the turret disk near the tool block and located a specific distance from the load cell point to measure deflection at given loads.

The load cell was located the same distance from the joint face on the quick change tools, and from the sleeve on the stick tool. A 2 ½” diameter part was chucked with 4” of stick out, a load cell was connected to the chucked part and the boring bars. The test was done in a new Hitachi HT40G turning center. Tested were new KM 50, Capto 50, ABS 50 boring bars and clamping units, and a 1 ½” steel shank boring bar. * If you have any questions or special requirements for other lengths and tapers, please contact us and we will help you out! * Call for current availability - we generally have in-stock CAT, BT Test Bars, others are generally a 1-2 days before we can ship.Back in 1996 we did stiffness tests with quick change tool joints compared to a 1 ½” boring bar. Runout Test Bars are available for all major machine tapers including:CAT / DIN / BT These are surface hardened and not a soft material like many of the cheaper test bars available on the market. Straight and VDI arbors are all 0.003 mm (3 micron) / 0.00011in. Check them after a machine has been crashed and take the proper steps before you start making scrap parts.Ĭhuck testbar runout tolerances and accuracy Turning Center Runout Testbars are easy to use and a fast way to verify your machine spindle is running properly and aligned. The Chuck mandrel test bar can be used to confirm accuracy without the need to consistantly run test cuts on a piece of stock. The chuck runout test bar can be used to test your Lathe or Turning Center for accuracy and alignments, and also to ensure a stable production environment as well as consistency moving jobs from one machine to another.

Capto c6 test bar