Tag Archive: cold drawn steel

  1. Cold Drawn Steel for Pistol Hammers

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    Rathbone Precision Metals provides high-precision metal parts for a variety of sectors, including the power generation, aerospace, firearms, manufacturing, and medical industries. We specialize in precision cold rolled and cold drawn profiles from numerous metals and alloys, such as carbon steel, stainless steel, nickel alloys, copper alloys, and much more. Our final profiles may be provided in bar lengths or cut into specified length pieces.

    Our cold drawing processes provide myriad benefits, including:

    • Superior surface finish
    • Increased strength
    • Improved straightness
    • Controlled dimensional precision
    • Improved machinability

    Our advanced equipment and skilled craftsmen are capable of creating products with standard dimensional tolerances ranging from +/- 0.002 inches to an optional +/- 0.0005 inches, with even tighter tolerances achievable upon request.

    The Cold Drawing Process

    Rathbone Precision Metals’ process of cold drawing by pulling metal though a die is used to produce a number of profile configurations for a number of applications. As the metal is pulled through the die at room temperature, plastic deformation occurs as the metal takes on the shape cut into the die. This cold working increases mechanical properties consistently along the length of the bar being drawn. As a result of the material being constrained within the shape of the profile cut into the die, each bar is uniformly dimensioned from one end to the other. In addition, the cold working imparts superior surface finishes as compared to hot extruded profiles.

    The Pistol Hammer

    Small and asymmetrically shaped, pistol hammers strike the percussion cap or firing pin to ignite the propellant which launches the projectile. The above characteristics make cold drawing ideal for producing complex profile configuration for pistol hammers. The manufacture of cold drawn steel for firearms requires superior accuracy and precision – if the smallest part does not fit or function correctly, the consequences can be disastrous.

    At Rathbone Precision Metals, our cold roll die design and manufacturing capabilities allow us to produce dimensionally accurate hammer parts with tight corner and fillet radii with linear dimensional tolerances up to ± 0.002 inches. We are also able to cold draw serrations in fine detail, eliminating the need for secondary machining operations and reducing overall production cost.

    We frequently work with 4140 steel and higher steel alloys (such as stainless steel) in the manufacture of pistol hammers. The superior ductility, toughness, and tensile strength properties of these materials ensure that our pistol hammers can withstand the harsh impact loads experienced in firearm applications. Exacting process controls allows us to offer steel alloy decarburization in accordance with customer requirements and industry standards.

    Rathbone Precision Metals can produce myriad profiles with an 125 Ra finish and in many instances 60 Ra. All products are thoroughly inspected for dimensional accuracy at our facilities per our stringent quality management procedures using our fleet of advanced measuring equipment.

    Shooting Straight with Rathbone Profiles

    Rathbone Precision Metals can cold draw nearly any type pistol hammer profile. Our team of experienced engineers and technicians can meet the most stringent production demands – from low volume units to large-scale mass production.

    Are you interested in a manufacturer that can handle the tight tolerances and strict requirements of your firearm specifications? Have your pistol hammers manufactured by Rathbone Profiles! Contact us or request a quote to get started.



  2. Profiles Made with Gear Drawing

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    At Rathbone Precision Metals Inc., we specialize in cold drawn gears – in particular, gear and spline, and rack and pinion cold drawing. Cold drawing involves the precision extrusion of preformed metal shapes at room temperatures through a die or a series of dies. This process allows us to produce cleanly finished products within extremely tight tolerances. Our cold drawn gears also benefit from improved dimensional consistency and straightness, as well as enhanced overall strength due to strain hardening.

    What Types of Profiles for Gears Can Rathbone Precision Metals Draw?

    Since 1905, Rathbone Precision Metals Inc. has built a solid reputation as a leading manufacturer of cold drawn gears and other machining components for a variety of industries. During more than 100 years of operation, we have custom drawn countless gear profiles containing unique tooth configurations for the automotive industry. Using a variety of metal alloy compositions, we can produce parts and components within tolerances up to ± 0.002 inches. Furthermore, cold drawing gives us greater control of corners, allowing for precise fillet radii to ± 0.005 inches.

    We can also cold draw gears for use in heavy equipment and machinery, which often require the production of gears with asymmetrical profiles. The smooth finishes obtained by our processes eliminate the need for secondary milling process such as hobbing, resulting in cost savings that are passed on to our customers.

    In addition to the cold drawing of gears, splines, and pinions, Rathbone Precision Metals Inc. also specializes in the cold rolled manufacturing of various mechanical components from a range of metals and alloys including carbon steel, stainless steel, nickel alloys, and copper alloys.

    The Process of Gear and Pinion Drawing

    Cold drawing is done by pulling or extruding new, hot rolled shapes through one or more precision dies. As the material passes through the die, it is compressed into the shape of the die. This forceful change of shape readjusts and strengthens the crystalline structure of the metal due to a process known as strain hardening.

    Because cold drawing is done at near-room temperatures, the finished products do not undergo cooling and shrinkage processes (as in hot drawn and hot rolled methods) which tend to alter the overall final dimensions. This characteristic makes cold drawing ideal for producing components (such as gears) that require high levels of dimensional accuracy and precision with exacting tolerances. Cold drawn methods are also cost-effective for both low and high production volumes.

    Learn More

    Rathbone Precision Metals Inc.’s cold drawn products offer numerous advantages over gears produced by other methods. If you would like to know more about our gear drawing solutions and processes, feel free to contact us or request a quote.



  3. Cold Drawn Steel vs. Cold Rolled Steel

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    Steel rolling is a manufacturing process that involves passing metal stock through a pair of rolls in order to output it as flat steel sheets. Steel rolling can be divided into two main processes: hot rolling and cold rolling. The latter is further divided into cold rolling and cold drawing, which are both discussed in further detail below.

    It’s important to understand the difference between cold rolled and cold drawn steel in order to choose the best process for your specific unique.

    What Is Cold Drawn Steel?

    Cold drawn steel, sometimes referred to more broadly as cold finished steel, is passed through a die or several dies at room temperature to help shape the metal into the desired form.


    What Is the Cold Drawn Steel Process?

    To make cold drawn steel, hot rolled straight bars or hot rolled steel coils are first brought down to room temperature. Once the steel stock cools down, it is passed through a die. Several passes through the die may be required before the steel can be drawn into the final product, typically a bar or wire.


    What Are the Benefits of Cold Drawn Steel?

    Cold drawn steel properties offer several advantages over those of hot rolled steel. For one, this technique can be used for products requiring more precise measurements since the metal does not change shape during the drawing process. Cold drawn steel also offers high tensile strength and better aesthetics.


    What Is Cold Rolled Steel?

    Cold rolled steel refers to stock that is rolled at room temperature. Because the material is not subjected to heat, cold rolled steel is stronger and harder than hot rolled steel, though cold rolled steel less malleable.


    What Is Cold Rolling?

    Cold rolling refers to the process of rolling steel stock to the desired shape and size at room temperature.

    Depending on the finished product, an annealing process — which involves treating cold rolled steel with heat — can be used to enhance cold rolled steel properties. Annealing may be done prior to, during, or after the cold rolling process.


    What Are Common Cold Rolled Steel Applications?

    Cold rolled steel is ideal for use in products that require high precision. Therefore, this process is commonly used for home appliances, metal furniture, and a wide range of construction applications.


    Learn More

    Rathbone Precision Metals, Inc. manufactures precision cold drawn and cold rolled steel profiles using a wide array of materials, including carbon steel, free cutting steel, alloy steel, stainless steel, nickel alloys, high temp alloys, and brass and copper alloys.


    To learn more about the differences between cold rolled steel and cold drawn steel, or to request a quote for your specific needs, reach out to the team today.