RBX12 Air Power Spindle Allows Micromachining in a Machining Center

Originally titled 'Air Power Spindle Allows Micromachining in a Machining Center'

The air-driven spindle enables existing machines to be cost-effectively upgraded to perform high-speed micromachining in a normal machining center since this tool is driven by air supplied through a stop block or through the machine spindle.

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Big Kaiser’s RBX12 air power spindle is a high-speed air-driven spindle that achieves a variable rotational speed of 100,000-120,000 rpm.

The air-driven spindle, produced by Big Daishowa Seiki, enables existing machines to be cost-effectively upgraded to perform high-speed micromachining in a normal machining center since this tool is driven by air supplied through a stop block or through the machine spindle. Since there is no rotation of the machining center spindle required, an expensive machine tool spindle can be used without wear.

Operating at such high speeds helps to improve machining accuracy, enhance surface finish, significantly lengthening tool life, as well as reducing wear on the cutting tool since it will be running at the speeds intended.

High speed operation also means that processing time can be reduced. In various trials, the RBX12 was able to reduce machining time by more than 300 percent because of high rotational speed.

Because of its ceramic ball bearings and ultra-precise collet system, the runout accuracy of the RBX12 is excellent, which enables ultra-thin wall cutting. The AA-grade Mega Micro Collet guarantees 1-micron runout at the collet nose, and the 0.004” collapsibility ensures a near-perfect concentric clamping of a micro-tool shank, the company says.

The RBX12 also minimizes thermal displacement in the Z axis for top precision constant at <0.001 mm, while standard machining center spindles have as much as 0.012 mm.

The RBX12 is available with BCV40, BBT30/40 and HSK-A63/F63/E32 interfaces, and models not requiring a stop block have a small body diameter of 32 mm (1.260”). For further cost savings, automatic tool change is possible.