Wohlhaupter® Combi-Line
Roller Housing: Wohlhaupter® Combi-Line 
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The Challenge

One tooling switch can provide a smörgåsbord of benefits. 

When you’re searching for a new tooling solution, it’s always nice when you find an answer that goes above and beyond the improvements you need. Our customer was roughing and finishing steel roller housings for the structural steel/fabricator industry. The application required 3 boring passes to complete, resulting in lengthy cycle times and sub-par hole finishes. Each pass was made by a different tool, which caused additional headaches and increased inventory costs. And on top of that, the tooling produced non-round holes and inconsistent insert wear that caused tool failures. 

Our customer tested the Wohlhaupter Combi-Line boring system, and the results provided even more improvements than they had hoped for. For starters, the Combi-Line tool completed both the rough and finish processes in a single pass, eliminating 2 tools and our customer’s inventory woes in one shot. It also eliminated the tool failures. The one pass completion also slashed cycle time from nearly 4.5 minutes to 3 minutes (a 33% reduction). 

But the benefits didn’t stop there. The Combi-Line tool impressed our customer with a significant increase in tool life. Where the previous tooling produced 150 linear inches (3.81 M), the Combi-Line produced 400 linear inches (10.16 M) (a 167% increase). Also, the Combi-Line improved the resulting hole surface finish from 125 Ra to a much nicer 63 Ra (a 50% improvement). 

Cycle time decrease, inventory reduction, tool life increase, tool failure elimination, surface finish improvement...this smörgåsbord of benefits resulted from one switch in tooling. Don’t underestimate the impact a simple tooling change can have on your productivity; feast on the benefits. 

Find an Allied tooling distributor near you.

Product Wohlhaupter Combi-Line
Objective (1) Reduce inventory requirements
(2) Decrease cycle time
Industry Structural steel/fabricator
Part Steel roller housing
Material 4140 alloy steel/A36 structural steel
Hole Ø 8.858" (224.993 mm)
Hole Depth 3.500" (88.9 mm)

The Solution

Measure Competitor Boring Tool Combi-Line
RPM 215 290
Speed Rate 500 SFM (152.4 M/min) 675 SFM (205.74 M/min)
Feed Rate 0.004 IPR (0.102 mm/rev) 0.004 IPR (0.102 mm/rev)
Penetration Rate 0.86 IPM (21.844 mm/min) 1.16 IPM (29.464 mm/min)
Cycle Time 4 min 20 sec 3 min
Hole Finish 125 Ra 63 Ra
Tool Life 150 linear inches (3.81 M) 400 linear inches (10.16 M)
Tool Failure? Yes No

The Advantages
The Wohlhaupter Combi-Line tool provided:
  • 167% tool life increase
  • Decreased cycle time
  • Reduced inventory requirements
  • Improved hole surface finish
  • Eliminated tool failures