Surface feet per minute (SFPM or SFM) is the combination of a physical quantity (surface speed) and an imperial and American customary unit (feet per minute or FPM). It is defined as the number of linear feet that a location on a rotating component travels in one minute.

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As a generic coating type, zinc-rich coatings refer to organic (i.e., containing epoxy or polyurethane binders) or inorganic (i.e., containing silicate binders) coatings with high loadings of zinc dust. The zinc provides galvanic protection of the steel surface, meaning that it will corrode instead of the steel beneath it. As the zinc-rich coating corrodes it forms a barrier between the steel and its environment

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The most notable limitation of the epoxy family of coatings is their poor performance in sunlight — which is why epoxies are most often used in interior or submerged industrial applications. You might find epoxies protecting steel inside a nuclear power plant or submerged in a waste water treatment facility.

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Drill feed speedchart

Inorganic zinc-rich coatings tend to provide better galvanic protection and abrasion resistance than do organic zinc-rich coatings, but require a much higher level of surface preparation. Both variations perform well as a primer in a multicoat system, as they adhere well to the steel surface.

Because of their performance and longevity, epoxy polysiloxanes have been used by the United States Navy to minimize the lifecycle cost of its vessels. But this coating type can be used in a wide range of industrial applications including highway bridges, marine structures, wastewater treatment plants, storage tanks or anywhere that needs a long-lasting, high-performing coating system.

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Most often, polyurethanes are chosen as the topcoat of a total protective coating system. For example, polyurethane might be applied as a topcoat above a zinc-rich primer and epoxy intermediate coat on a highway bridge. Or even as a topcoat on the concrete walls and floors of a nuclear power plant. Other possible applications include the topside of ships, the exterior of waste water treatment facilities or on locks and dams. Basically, polyurethanes are versatile enough to be formulated to handle a wide variety of service environments.

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Polysiloxane coating systems are a relatively new addition to the market, only dating back to about the 1990s. Polysiloxanes provide excellent abrasion and weather resistance, as well as appearance retention benefits — but fail to provide the flexibility and corrosion resistance industrial environments require.

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HSSdrillspeeds and feeds chart pdf

20231220 — Nickel has the atomic number 28 and the chemical symbol Ni. It is a glossy silvery-white metal with a faint golden hue.

Zinc-rich primers will often be applied as part of a two-coat (zinc-rich primer, polysiloxane topcoat) or three-coat (zinc-rich primer, epoxy intermediate coat, polyurethane topcoat) system. You’ll find zinc used in a wide range of highly corrosive environments, including bridges, coal plants and the topside of ships.

These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.

Industrial coating systems provide steel structures with long-term protection against their environment. To do this, the coating system must be well-equipped to handle the environmental conditions of its environment, whether that’s heat, sunlight, contact with chemicals or constant abrasions.

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Combining the benefits of epoxies with polysiloxanes —into epoxy polysiloxane coatings— provides industry-leading abrasion, weather, UV, chemical and corrosion resistance. Although epoxy polysiloxane hybrid coatings cost more than epoxies and polyurethanes, they can be applied more quickly and last longer — providing better long-term value for many applications.

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Polyurethane coatings are widely used —often as a topcoat— in applications where durability and abrasion resistance are key considerations. Polyurethanes generally fall into two categories: Aliphatic and aromatic. Aliphatic polyurethanes provide excellent color retention and perform well in sunlight, making them well-suited to exterior environments. Aromatic polyurethanes, on the other hand, better lend themselves to submerged environments — they’ll chalk and weather when exposed to sunlight.

The prevailing service environment —along with factors such as cost, accessibility of the asset, expected labor costs, desired service life of the coating system— will dictate which coating system is best-suited for your application.

For designers or owners looking for a short list of coating systems suited for their application and budget, calling a coating contractor like Thomas Industrial Coatings is a good place to start. Coating selection happens on a case by case basis, and we can evaluate the specific needs of your application, offering several systems that could work based on our decades of experience in the industry. Get in touch today to learn which coating system will work best for your needs.

Drill feed speedchart pdf

Note: The circumference unit is in inches and is dependent on if it’s a milling or turning operation. For milling operations, the circumference is of the cutter (tool in the spindle). For turning operations, the circumference is of the workpiece (the material in the chuck).

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Understanding the most common generic coating types —and how they work together to form a total protective coating system— allows designers and owners to choose the system best-suited for their prevailing service location.

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Different types of industrial coatings have different chemical and physical properties —corrosion resistance, performance when exposed to UV, etc.— but no coating provides all the protection a structure needs. That’s why assets are coated with one or more coating types to form a total protective coating system, or a system providing all the chemical, physical and galvanic protection required to protect the substrate from its environment.

Here, we’ll describe the benefits and tradeoffs of four of the most common generic coating types: Epoxies, polyurethanes, polysiloxanes and zinc-rich primers, providing examples of how each might be used in a total coating system.

Epoxy coatings are typically comprised of an epoxy base and a curing agent. A wide variety of coating properties can be achieved by manipulating either of these components: Epoxy polyamide coatings offer great moisture resistance, epoxy mastic coatings offer exceptional film thickness and phenolic epoxy coatings offer good chemical resistance. And due to this versatility, you’ll find epoxies used as a primer, intermediate coat or even a topcoat depending on the needs of the application.

Inches per minute (IPM) is a speed measurement of how many inches traveled in a minute, without regard to direction. In machining, it is primarily used as a feed rate (imperial units).

A CNC mill calculates speeds and feeds or SFM based on the information the user enters. The type of CNC mill, the type of machine controller, and the age of the machine will affect the amount of information that can be input directly into the machine. Historically G-code was created externally from a CNC machine and then loaded onto the machine. Externally created G-code was authored either with a dedicated CAM software or with a plug-in embedded in the 3D parametric modeling software. The user would input the same CNC machine they want to create the part on (with the specific work holding fixture), the type of tooling (manufacture, part number etc.), and the specific material being machined. The software generates the speeds and feeds based on the part's geometry and all the inputted information. This creates the optimal speeds and feeds or SFM tailored to the exact part and CNC machine.