Case Studies

Reducing Labor Applying Spotfaces to a Nickel Chain Wheel Drum

Posted on: October 9, 2017
Tags: Precision Machining, Spotfacing, Nickel, SOLO

Download PDF


A contract manufacturer was looking for a solution to apply back spotfaces for the bolting that does the job without the time-consuming re-clamping of the work piece. The time used for the re-clamping amounted to approximately 1 hour per work piece (not including alignment and zeroing).

spotfacing chain wheel drum, reducing manual labor machining, machining nickel, back spotfaces on nicke

Application Details: 

  • Bore diameter: Ø21.0 mm
  • Countersink diameter: Ø40.0 mm with corner radius R1.2
  • Number of bores per workpiece: 40
  • Material: G-22 Ni MoCr5-6
  • Machine: Lathe Mazak Integrex 70YB / Horizontal machining
spotfacing chain wheel drum, reducing manual labor machining, machining nickel, back spotfaces on nickel


HEULE proposed SOLO2. SOLO2 possesses a particular feature: when the spindle is in idle state, the blades are extended. Only at a speed of over approx. 2000 rev/min dp the blades retract. This way, the tool head can travel across the bore to access the back side of the bore.  SOLO2 allows low spindle speeds to machine tough materials or interrupted bore edges.

Tool choice: SOLO2 21.0 / 40.0 mm, working length 50 mm

Blade choice: SOLO carbide blade A type coating

Machining parameters:

  • Working speed: 300 rev/min.
  • Feed: 0.03 mm/rev.
spotfacing chain wheel drum, reducing labor spotfacing nickel, back spotfacing tool, machining nickel


Of primary importance are the cost savings generated by the complete machining without having to reclamp the workpiece. At a yearly volume of 200 workpieces, automating the back spotfacing resulted in a  reduction of over 200 hours, which is still a significant cost saving after accounting for the tool investment. Another benefit to the customer is the elimination of the labor-intensive re-clamping and re-adjustment of the large work piece, which increases efficiency.



Interested in the SOLO back spotfacing tool? Visit the SOLO product page for more info. 

Need help selecting a tool? Visit our online Tool Selector and go to the Locate Agent page on our website to find your local technical sales representative. For more assistance, contact us at or 513-860-9900 and we'll be happy to point you in the right direction.