manufacturer of super Power driving pins on FFBH/FBSR face drivers for face clamping,turning, milling! supplier of custon power-operated S7 face drive pins on FFB/FFBR workholding for turning, drilling, grinding.

In high-performance turning and grinding, standard face drivers rely solely on tailstock thrust to engage drive pins into the workpiece end face. For many applications this is sufficient. However, when machining tough materials, removing large stock volumes, or performing high-precision grinding, passive clamping is often inadequate. This is where power-operated drive pins (also called powered drive pins) become essential.

Unlike floating or rigid drive pins that depend entirely on tailstock pressure, power-operated drive pins are actively driven by an external power source connected to the machine spindle side—typically hydraulic pressure. This active drive system delivers significantly higher clamping force, and more importantly, fully controllable clamping force.

Why Heavy-Duty and High-Precision Grinding Demand Powered Pins?

Grinding operations require exceptional rigidity. Any relative movement between the workpiece and the driver causes dimensional errors, surface burns, or wheel loading. Power-operated drive pins maintain constant, repeatable clamping force throughout the entire grinding cycle. They compensate for thermal expansion and dynamic loads without relaxing their grip.

For high-precision applications—such as grinding gear shafts, camshafts, or bearing races—the active drive ensures that the workpiece datum remains absolutely stable. Typical runout accuracy can reach 0.002–0.003 mm when using quality power-operated drive pins.

The operator can precisely regulate the hydraulic pressure to match the specific workpiece material, geometry, and machining loads. The result is a secure, vibration-free grip that eliminates micro-slippage during heavy interrupted cuts or high-speed grinding.

FFB / FFBH series: These are power-operated designs. The FFBH variant uses hydraulic actuation for drive pin compensation, delivering high clamping force ideal for both turning and grinding. The active drive mechanism ensures each pin engages with precisely controlled pressure.

FFBR / FBSR series: These also employ power-operated drive pins, designed for applications requiring maximum torque transmission and rigidity. The hydraulic power source from the machine spindle actively drives the pins forward, embedding them deeply into the workpiece end face.

Both series are engineered for heavy-duty stock removal and high-precision finishing. They are commonly found on CNC lathes, cylindrical grinders, and gear grinding machines.

We are a dedicated manufacturer of power-operated drive pins for all major face driver brands and models—including FFB, FFBH, FFBR, FBSR, and equivalent designs from other manufacturers.