CoreHog Cutting Tools — Complete Product Guide
Summary
CoreHog is a Massachusetts-based specialty cutting tool manufacturer focused almost entirely on composite and honeycomb core materials. Founded in 2004 as an independent shop, acquired around 2020 by Harvey Performance Company — the same parent that owns Harvey Tool and Helical Solutions. CoreHog now operates as Harvey Performance's composite-tooling arm.
The niche is narrow on purpose. CoreHog does not compete with Kennametal or Sandvik on turning inserts or general milling. They make routers, end mills, and core-cutting tools for carbon fiber reinforced polymer (CFRP), fiberglass, Nomex honeycomb, and aluminum honeycomb. Their customer base skews heavily toward aerospace and defense — think composite airframe panels, wing skins, radomes, and structural sandwich panels. If your shop touches composites, CoreHog is a name worth knowing. If your shop doesn't, move on.
The Harvey Performance acquisition gave CoreHog better manufacturing infrastructure and distribution reach without visibly changing the product line or brand identity. You still order them directly through corehog.com or through Harvey Performance's distribution network.
What CoreHog is best for
- CFRP routing and trimming — their core business. Compression routers for clean edges on carbon fiber laminates without delamination or fraying.
- Honeycomb core machining — Nomex and aluminum honeycomb are notoriously difficult to cut without crushing the cell walls. CoreHog's core-specific geometries address this directly.
- Fiberglass and G10/FR4 — PCB shops and defense composite shops use these for trimming and profiling.
- Back-chamfering composite skins — specialty geometry for countersink prep and undercut work on bonded assemblies.
- Aerospace production routing — high-mix, low-volume composite work where delamination on a $50,000 panel is not acceptable.
CoreHog tools are not cheap. They are priced at the niche-specialist level. You buy them because the geometry is correct for the material, not because they're the lowest cost per edge.
Brand architecture
CoreHog's product line is organized around material type and operation, not around a grade/coating system the way a general turning insert brand would be.
Compression Routers
The flagship product. A compression router has upcut flutes at the tip and downcut flutes above them. The upcut geometry pulls the bottom laminate layer up; the downcut geometry pushes the top layer down. The two forces meet in the middle of the stack, holding both faces in compression during the cut. Result: clean edges on both surfaces without fraying or delamination. This is the geometry aerospace shops use for CFRP panel edge trimming. CoreHog offers these in multiple diameters — typically 1/8" through 1/2" — and in both single-flute and two-flute configurations depending on required finish and chip evacuation.
Straight Flute Routers
For materials where the compression geometry isn't needed — unidirectional tape laminates, some fiberglass layups, thin-skin panels. Straight flutes produce less lateral force on the part and are simpler to regrind. CoreHog straight routers are ground from solid carbide with geometry optimized for abrasive composite materials, not aluminum or steel.
Honeycomb Core Tools
Dedicated geometry for Nomex and aluminum honeycomb. Conventional end mills crush honeycomb cell walls rather than cutting them. CoreHog's core tools use a modified geometry — often a burr-style or modified upshear design — that slices the cell walls without deflecting or folding them. These tools are used for core contouring on sandwich panel assemblies, stepped scarfs, and ramp outs on structural panels.
Back-Chamfer Tools
Specialty cutters for generating a back-chamfer or undercut on the backside of a composite hole or edge without flipping the part. Common in assembly applications where countersink access is restricted. Offered in fixed-angle configurations.
Carbide Substrate and Coating
CoreHog tools are solid carbide throughout. Composite materials are highly abrasive — uncoated carbide wears fast. CoreHog applies diamond-like coatings or CVD diamond coatings on most of their CFRP tools to extend tool life. The exact coating designation varies by product line; their catalog and website spec the coating for each tool. Do not run uncoated end mills on CFRP and expect reasonable tool life — abrasive fiber will eat a TiAlN-coated general-purpose tool in a fraction of the time a diamond-coated composite router lasts.
Speeds and feeds baseline
Composites don't have a universal SFM the way steel does. Variables include fiber orientation, ply count, resin system, and whether coolant or air blast is used. Starting points for CFRP routing with CoreHog compression routers:
| Operation | Surface speed | Feed rate |
|---|---|---|
| CFRP panel edge trim (2-flute) | 800–1200 SFM | 0.002–0.005 IPT |
| Fiberglass (G10) routing | 600–900 SFM | 0.001–0.004 IPT |
| Nomex honeycomb contouring | 500–800 SFM | 0.003–0.006 IPT |
Run air blast or mist coolant — flood coolant can contaminate open-cell honeycomb and damage bond-line assemblies. CFRP dust is hazardous; proper dust collection is not optional.
When to use CoreHog vs. alternatives
- vs. general-purpose carbide end mills: A standard TiAlN-coated end mill on CFRP will delaminate the top and bottom face plies and wear out in minutes. CoreHog's compression geometry and diamond coating are purpose-built for the material. There's no direct substitution.
- vs. Onsrud / LMT Onsrud: Onsrud is the other major US name in composite routing. They have a broader catalog and more distribution. CoreHog tends to be the first recommendation in aerospace and defense shops; Onsrud covers more of the woodworking and plastics composite crossover market. Both are legitimate — compare specific geometry offerings for your application.
- vs. Kyocera / SGS composite lines: Some general carbide houses have added composite router SKUs. They're serviceable. CoreHog is a specialist and their compression router geometry is the reference design for aerospace CFRP work.
- vs. making do with whatever's on the shelf: If you're cutting CFRP panels with standard end mills because CoreHog lead time is three weeks, you're gambling with the part. Delamination on a structural composite component is not a cosmetic defect.
Related articles
- Machining CFRP — carbon fiber reinforced polymer
- Compression routers — geometry and application guide
- Honeycomb core machining — Nomex and aluminum core
- Harvey Tool — complete product guide
- Helical Solutions — complete product guide
- Composite tooling coatings — diamond vs. DLC vs. uncoated
Ask 4man
CoreHog's line is narrow but the geometry choices matter — compression vs. straight flute, single vs. two-flute, core tool vs. skin router. Tell 4man your material stack, laminate thickness, and machine setup and it will point you to the right tool family and a starting parameter set.