Introducing the Pinnacle Series X2 mini-mill!

Introducing the Pinnacle Series X2 bench mini-mill from KDN Tool & Automation Engineering Co LLC. Built upon over two years of worldwide experience with retrofitting the Sieg X2 mini-mill, the Pinnacle Series is offered in three levels of completion. First level, the base camp, offers three-axis ball screw actuation with single pre-loaded ball nuts. Ball screws are 5/8” DIA 5TPI with a .0003”/1” lead accuracy. Ball screw thrust load is handled by a pair of grooved-race ball thrust bearings with 2000+lbs dynamic load rating each. The bearings are pre-loaded and secured with a lock nut. Ball screw to motor coupling is via one “Oldham” style anti-backlash slotted disc coupling per axis. Standard axis drive motor mounting plates mate with NEMA 23 motors and NEMA 34 motor plates are available as an option. We utilize a direct drive motor coupling arrangement that takes advantage of a stepper motors low-end torque parameters. We have teamed with the Steele Company to include a variation of their two step pulley spindle drive configuration yielding whisper quiet 0-1700 and 0-4300 RPM ranges. The stock Sieg spindle motor speed control has been replaced with an American made industrial quality speed control facilitating interface with a 0-10 VDC control signal that can be provided by cnc software. We offer an interface board that is designed to connect between DeskCNC and 0-10VDC input as well.

Mechanical Specifications:
 Machine table size = 15" X 3.625"
 Work envelope = 9" X 3.8" X 9"
 Positional Accuracy = .0003" / 1" travel
 Backlash = <= .0005"
 Repeatability = .001" + step motor specs
 Spindle taper = R-8
 Spindle drive mechanism = two-step pulley & V–belt
 Spindle Speeds = 0-1700 and 0-4300 RPM infinitely variable
 Footprint = 24" D X 36" W X 30" H (including x axis travel limits & double stack motors)
 Weight = @125 lbs.

Mechanical Components:
 Nook Industries rolled ball screws. 5TPI 1 per axis
 Single "pre-loaded" ball nuts yielding <=.0005" backlash. 1 per axis
 Bearing housings custom machined from 6061 aluminum bar stock.
 Grooved race ball thrust bearings. 2 per axis. 2100-LB dynamic load rated each.
 Ruland brand "Oldham" style anti-backlash slotted disc couplings.
 In line motor mounting exploits step motors inherent low speed torque characteristics.
 Modified spindle mount casting for ball screw actuation.
 Modified saddle casting for ball screw actuation.

Optional Spindle Drive Components:
 Bodine "Pacesetter" .25 hp 230 VAC inverter duty rated spindle motor.
 Spindle Motor Drive: 120 VAC single phase in / 230 VAC 3 phase out inverter / VFD.

Our Advantages:
 Cast Iron Dovetail Construction.
 Ball Screw motion components. 90% efficient
 Tried & true CNC conversion design.
 Top quality American made components added.
 All castings are checked for fit & finish.
 Sliding surfaces indicated and adjusted for proper alignment to one another.
 Machine arrives broken-in and ready to run.
 R-8 spindle taper offers a multitude of affordable tooling.
 "Old School" machine building techniques from the heartland of the Industrial Revolution.

Introductory Price: $2500.00 + Actual Shipping costs & $50.00 Crating fee.

Options Available:
 Lubrication grooves machined into castings. (W/fittings & tubes) +$175.00
 One-shot lubrication system. +$ 75.00
 Column indicated and pinned. +$100.00
 Home switches installed. +$ 75.00
 Limit switches installed. +$100.00
 Optical home and limit switches. +$ 20.00 per switch
 Inverter / VFD Spindle Drive. +$500.00
 Precision rolled ball screws .000083”/1” accuracy +$ 75.00

We also offer step motors and drive electronics to compliment the machines. We can provide integrated cnc control software as well to produce a complete plug and play machine for you.


Kenneth Cardolino
KDN Tool & Automation Engineering Co. LLC
www.kdntool.com