Coolant Chemistry Is Process Control

Keyways shouldn’t be a production bottleneck. But they still are. Not because they’re complicated— because the process around them is. When you need to machine a keyway, slot, or internal feature, the decision often comes down to imperfect options: broaching (if the setup even exists), wire EDM (slow and expensive), running secondary operations on another machine, or sending parts out altogether. What follows is rarely efficient. The workflow breaks. Parts are pulled from the machine, re-fixtured, and re-indicated. Alignment becomes a concern, and with every additional step, you introduce more time, more cost, and more risk. What should have been completed in-cycle turns into a fragmented process. This is the reality many shops face. “We’ll just broach it later.” “That has to go to EDM.” “We don’t have that capability on this machine.” “We lost position when we moved it.” These are common phrases on the shop floor—but they all point to the same issue. A one-operation part becomes a multi-operation problem. The duMONT CNC Motorized Slotter changes that by bringing the operation back into the machine. By converting rotary motion into a controlled vertical reciprocating stroke, it allows CNC lathes and mills with live tooling to perform slotting, keyway cutting, and internal shaping without ever removing the part. What does that actually mean in practice? It means single-setup machining. No part transfers. No re-indicating. No alignment risk. The feature is cut exactly where it belongs, maintaining precision from start to finish. With full CNC control, the stroke is programmable, with controlled depth and feed, delivering consistent, repeatable results without the variability of manual broaching. Because it integrates directly into existing programs and runs on machines with live tooling, there’s no need for dedicated slotting equipment. Tooling flexibility is another advantage. Whether it’s keyways, internal splines, slots, or form features, if it can be cut with a reciprocating tool, it can be completed in-cycle. On the shop floor, the impact is immediate. Secondary operations are eliminated. Outsourcing becomes unnecessary. Fixture changes are reduced. Alignment issues disappear. Instead of building workarounds, shops can complete parts in one setup. The result is measurable: reduced cycle time, improved positional accuracy, lower cost per part, faster turnaround, and increased machine utilization. Most importantly, the entire process stays under your control. Bottom line—if you’re moving parts just to finish internal features, it’s not a tooling problem. It’s a workflow problem. The duMONT CNC Motorized Slotter—and indexable broaching solutions—solve both. Let us show you how duMount Indexable Broaching can speed up your workflow

If you’ve ever drilled carbon fiber, you’ve seen it. The entry looks clean. The top surface checks out. Then you flip the part—and the exit is destroyed. Delamination, fuzz, and often scrap. The typical response is to slow everything down. Add peck cycles. Reduce feed rates. What should be a quick operation turns into a drawn-out process just to avoid damage. A three-second hole suddenly takes five times longer—and still isn’t guaranteed to be right. The issue isn’t speed—it’s force. Most drills push through material, and when they break through CFRP, there’s no support left behind the cut. Instead of shearing cleanly, the tool forces fibers outward, separating them from the resin. That’s what causes delamination at the exit. The problem only intensifies with stack materials like CFRP with aluminum or titanium. Now you’re dealing with hot metal chips re-entering the hole, damaging the walls and compromising tolerances. The signs are familiar: crunching at breakthrough, bird nesting on the tool, reliance on peck cycles just to get through, and fuzzy exits that require a second operation. At that point, it’s no longer just a tooling issue—it’s physics working against the process. A better approach is to change how the cut happens. The Wave-Point® Drill from Sharon-Cutwell is designed to do exactly that. Instead of pushing through the material, it pulls fibers into the cut, maintaining control during breakthrough. Its patented wave geometry breaks the cutting edge into stages, distributes cutting forces across multiple points, and stabilizes the material as the tool exits. The result is a controlled, clean break rather than fiber separation. On the shop floor, that translates into real gains. Higher feed rates without delamination. Clean entry and exit holes. No fuzz or uncut fiber. Stable performance in CFRP/aluminum and CFRP/titanium stacks. Peck cycles can be reduced or eliminated, and the CVD diamond coating extends tool life even in abrasive materials. The outcome is a more predictable process. No more programming around the problem—no slowing feeds, no excessive pecking, no secondary cleanup, and no constant interruptions to manage chips. Instead, you get consistent hole quality, reliable cycle times, and faster throughput—often bringing cycle times back down to just a few seconds per hole. Bottom line: if your process is built around avoiding damage, you’re already sacrificing efficiency. Stop compensating for the problem and start cutting with control. Learn How Custom tools from Sharon-Cutwell can improve your productivity and results .