Coating Services

Cutting tool and wear parts substrates have benefited from enormous engineering advances over recent decades. Thin film coatings, when properly applied, improve tool and part characteristics and functionality. They increase surface hardness, lower the friction coefficient and thermal conductivity and provide a chemically inert surface. As a cutting tool manufacturer, Guhring offers a level of coating expertise without equal in the industry. Guhring was the first to introduce TiN coating to tools in 1980 and has remained the global leader in developing and applying new coating technology. Today, Guhring offers a full range of high performance PVD (Physical Vapor Deposition) coatings to meet customers’ diverse needs.

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Coating Locations

Brookfield, Wisconsin
1445 Commerce Avenue
Brookfield, WI 53045
P: (262) 784-6730
P: (800) 776-6170
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Bloomfield, Connecticut
121 W Dudley Town Rd
Bloomfield, CT 06002
P: (860) 216-5948
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New Hudson, Michigan
29550 W.K. Smith Rd Suite B
New Hudson, MI 48165
P: (248) 486-3783
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Endurum

Steel specialist
Thanks to a nano-layer structure as well as reduced aluminum content Endurum was specifically adapted for the drilling of low-alloyed

Recommended applications:

  • Drilling Carbon
  • Free-cutting and manganese steel at low and medium cutting speeds

Coating Properties:

Structure multi-layer with nano-layers, nano composite
Color copper
Hardness (HV 0.05) 4000
Application Temperature < 800 C
Coating Material TiAISiN-based

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FIREX

Heat & wear resistance in multi-layer
FIREX® is a multi-layer coating that provides the shock resistance of TiCN coating with the heat resistance of TiAlN coating. This universal application coating was initially developed for dry machining but has since become the most popular heat resistant coating. FIREX is a multi-layer combination of TiN and TiAlN coatings which provides thermal stability and wear resistance in both high temperature and applications that do not generate excessive heat.

Recommended applications:

  • HSCO and carbide cutting tools (drilling, milling, turning)
  • Punches
  • Wear parts
  • Hobs and broaches

Coating Properties:

Coating Material TiN-TiAlN
Hardness (HV 0.05) 3,000-3,300
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.5
Thickness (µm) 1.5 - 5
Oxidation Resistance (°F) 1,470
Color red-violet

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Molyglide

Reduce material adhesion
MolyGlide®, with its low coefficient of friction and good sliding properties, is deployed mainly to reduce adhesive wear (scuffing, seizing, cold-welding) and can also withstand high loads of deficient lubrication or dry running. Surface fatigue (pitting) and tribo-oxidation (fretting corrosion) are largely prevented. Often refered to as "Teflon®-like" due to its non-stick properties. MolyGlide is bio-compatible.

Recommended applications:

  • punching and forming (low-lubricant or dry working)
  • plastic injection molding (dry running of movable tool components)
  • gears and ball bearings with high surface pressure levels
  • precision components of highly stressed combustion engines
  • systems without lubrication (clean room technology)
  • fluid technology components
  • cutting tools (aluminum machining)

Coating Properties:

Coating Material MoS2-based
Hardness (HV 0.05) n.a.
Coating Temperature (°F) 305
Friction Coefficient on Steel (dry) 0.1
Thickness (µm) 1
Oxidation Resistance (°F) 1,470
Color silver
Foodstuff-neutral no

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nano-A

Micro-layered heat and wear resistance
Guhring's newest PVD applied nano coating is nano-A™. nano-A is a multi-layer coating that combines TiAlN and AlTiN coatings in a micro-layer structure that is harder and more wear resistant. Whereas TiAlN coating has an oxidation temperature of approximately 1,470° F, AlTiN coating has an oxidation temperature of approximately 1,650° F, and the hardness is increased to 3,800 (HV 0.05). The micro-layer structure of nano-A makes this a better choice for applications where AlTiN would normally be used, such as hard milling steel and materials over 45 HRC; but test results have also shown that nano-A is frequently the best coating for high speed drilling and milling of all grades of stainless steels including 300 and 400 series grades.

Recommended applications:

  • Carbide cutting tools used for alloyed steel, stainless steel & aerospace materials

Coating Properties:

Coating Material AlTiN-TiAlN
Hardness (HV 0.05) 3,800
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.6
Thickness (µm) 1.5 - 5
Oxidation Resistance (°F) 1,650
Color dark gray

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nano-FIREX

The newest generation of FIREX®
nano-FIREX® coating is a PVD hard coating which combines the heat and wear resistance of TiAlN with the universal applicability of TiN coating, all in one multi-layer structure. The TiAlN in the structure increases the oxidation temperature (the point in which the coating combines with oxygen in the atmosphere and begins to break down), or operating temperature, to 1,470° F. This is much higher than TiCN, which has an oxidation temperature of 840° F. Another property of TiAlN coating is that at elevated temperatures the coating will have a surface hardness of approximately 3,300 (HV 0.05), which is more than 3 times the hardness of TiCN. The multi-layering approach that combines TiAlN with TiN provides increased resistance to shock which can crack standard mono or single layer coatings. Guhring's nano-FIREX® has the same TiAlN/TiN components as standard FIREX, but in a new micro-layered structure. nano-FIREX has significantly more micro-layers in the same overall thickness than the original FIREX. This imparts superior wear characteristics, especially in applications where shock resitance is a major consideration.

Recommended applications:

  • HSCO and carbide cutting tools (drilling, milling, turning)
  • Punches
  • Wear parts
  • Hobs and broaches

Coating Properties:

Coating Material TiN-TiAlN
Hardness (HV 0.05) 3,000-3,300
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.5
Thickness (µm) 1.5 - 4
Oxidation Resistance (°F) 1,470
Color red-violet

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nano-RA

Steel specialist
Guhring’s nano-Ra coating relies on a proven TiN and TiAlN multi-layer structure combined with a ZrN based cover coating.

Recommended applications:

  • Drilling/milling of carbon
  • Free-cutting
  • Low alloyed steels

Coating Properties:

Structure multi-layered, graded
Color pale gold
Hardness (HV 0.05) 3300
Application Temperature < 800 C
Coating Material TiN/TiAIN based with ZrN cover coating

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nano-Si

Micro-layered heat resistance
Guhring’s coatings research department has developed a new nano multi-layer coating for nickel base materials and hardened materials that require high surface hardness coatings. Called nano-Si®, this TiAlSiN (titanium aluminum silicon nitride) based coating is designed to yield similar performance to diamondlike coatings without the restrictions on the host base material substrate. With a hardness value of 5,500 (HV 0.05), nano-Si® stands up to the most abrasive applications. The oxidation, or maximum useful operating temperature, is over 2,192°F, which is similar to high temperature coatings such as FIREX® or TiAlN. Test results in drilling inconel have shown a 35% increase in tool life compared to a comparable TiAlN based multi-layer coating using the same operating parameters. Similar results were found when machining cast iron and hardened steels over 52HRc. No other coating can provide this high hardness property while still retaining the toughness required in drilling and milling applications.

Recommended applications:

  • Carbide cutting tools used for alloyed steel, stainless steel & aerospace materials

Coating Properties:

Coating Material TiAlSiN
Hardness (HV 0.05) 5,500
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.55
Thickness (µm) 4 - 6
Oxidation Resistance (°F) 1,470
Color bronze

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Sirius

VA specialist
When drilling in stainless steels the cutting edges of cutting tools are subjected to extreme stresses. A mechanically wear resistant coating

Recommended applications:

  • Tapping in VA (through holes)
  • Drilling in VA
  • Milling in VA

Coating Properties:

Structure multi-layer, nano-structure
Color pale gold
Hardness (HV 0.05) 3,400
Application Temperature < 900 C
Coating Material TiAISiN-based with ZrN cover coating

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TiAlN

Heat and wear resistance
The optimized relationship of hardness and residual compressive stress of the titanium aluminum nitride coating TiAlN increases the stability of the cutting edges of machining tools. Its outstanding thermal and chemical resistance permit dry cutting and improvements in performance of highly stressed components. The high hardness of this mono-layer coating gives outstanding protection against abrasive wear and erosion.

Recommended applications:

  • HSS and carbide tools exposed to high thermal stresses
  • plactic injection molding
  • combustion engine components

Coating Properties:

Coating Material TiAlN
Hardness (HV 0.05) 3,300
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.5
Thickness (µm) 1.5 - 4
Oxidation Resistance (°F) 1,470
Color black-violet
Foodstuff-neutral yes

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TiCN

Wear resistant in the toughest conditions
The titanium carbon nitride coating TiCN is distinguished by extreme hardness and high toughness. Coated tools are outstandingly wear-resistant. The low coefficient of friction protects against cold-welding. TiCN coating is not recommended for high heat applications due to the relatively low maximum operating temperature. Threading and some milling applications are a natural fit.

Recommended applications:

  • milling (wet, moderate cutting speed)
  • tapping, thread forming
  • punching with high mechanical loads
  • forming of ferratic and austentic steels
  • plastic injection molding (melts with abrasive fillers or high fiberglass content)

Coating Properties:

Coating Material TiCN
Hardness (HV 0.05) 3,000
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.25
Thickness (µm) 1.5 - 5
Oxidation Resistance (°F) 840
Color gray-violet
Foodstuff-neutral yes

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TiN

Universal Applications
The titanium nitride coating TiN was introduced by Guhring in 1980 and it remains a proven and versatile standard coating. It provides effective protection against abrasive and adhesive wear. It is often applied for its decorative effect or as a wear indicator.

Recommended applications:

  • steel cutting
  • punching and forming (when working low-hardness materials)
  • molds for the injection molding of plastics
  • plungers of diesel injection pumps
  • medical instruments

Coating Properties:

Coating Material TiN
Hardness (HV 0.05) 2,400
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.5
Thickness (µm) 1.5 - 3
Oxidation Resistance (°F) 1,100
Color gold
Foodstuff-neutral yes

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Zenit

Titanium Alloys Applications
Developed to improve cutting tool performance in titanium alloys, this coating has also been proven to reduce built up edges when machining aluminum, and has had positive results in some nickel alloys. The Zirconium Nitride (ZrN) in Zenit is chemically inert in titanium, whereas coatings with a Ti-based element tend to want to bond with the workpiece material, causing a large increase in friction and reducing tool life.

Recommended applications:

  • carbide drills, end mills, reamers
  • Ti-alloy applications
  • (not applicable for HSS tooling)

Coating Properties:

Coating Material ZrN
Hardness (HV 0.05) 2,500
Coating Temperature (°F) 930
Friction Coefficient on Steel (dry) 0.4
Thickness (µm) 1.5 - 5
Oxidation Resistance (°F) 1,470
Color white gold

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