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1.2 h8 X 4 DOWEL ISO2338B MILD STEEL

Precision Dowel Pins

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Stock = 22550
Manufacturing Approximate lead time = 4 weeks

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Diameter / Width
1.2mm
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Material Type
Mild Steel
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Measurement Type
Metric
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Plain
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Product SKU : DPM01.2004ISO2338H8

SKU - DPM01.2004ISO2338H8

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What are Precision Dowel Pins

 

Dowels pins are solid, usually precision ground within narrow limits to establish accurate fitting. Precision dowels are usually used in holding parts together allowing the tightness of their fit to keep the alignment in place.

 

Use of Metal Dowel In Machinery

 
Steel dowel pins are often used as precise locating devices in machinery. Steel dowel pins are set to tight tolerances, as are the corresponding holes in them, which are typically reamed to help with their installation. A dowel pin could have a smaller diameter than its hole so that it slips in freely, or could be larger in diameter so that it must be have added force applied to get it into its hole (this is called an interference fit).

When outlining the design of mechanical components, use dowel holes are typically used by mechanical engineers as reference points to control positioning variations and so repeatable assembly quality can be attained. If the dowels were not used for alignment, the significant play could result in the components alignment causing variation. This variation can be avoided with proper use and installation of dowel pins in the design of any component.

 

When it comes to drilling, operations might introduce mechanical play with its fasteners. For example, when dowels are used in addition to bolts, the tighter dimensional tolerances of dowels and their mating holes—typically 0.01 mm (0.0004 inches)—result in significantly less play, on the order of 0.02 mm (0.0008 inches). Bolts up to 10 mm (0.394 in) in diameter typically have play on the order of 0.2 mm (0.008 inches). The manufacturing costs are going to be inversely proportional to mechanical tolerances so you must balance you need for mechanical precision against the cost of the materials and other factors such as how easy it is to serviced and if it can be manufactured.

 

There is quite a variety of specifications for dowels being made - military, ISO, DIN, ASME. Their size can even vary by dowel pin material. Metric Dowel pins are often found in two sizes. In DIN 6325 standard the dowel pins are slightly larger than the nominal value. For example, a 3 mm dowel pin will range from 3.002 to 3.008. In the ISO 2338 standard, the dowel pins are slightly smaller - 3mm nominal range is 2.986 to 3.000. The terminology (e.g. "oversized", "standard") is not entirely consistent across suppliers. In inch pins, "oversized" refers to pins that are more significantly oversized for worn out dowel pin holes. The most common inch sized pins are slightly oversized, and "Undersized" versions are also available.

 

Automotive dowels are used when precise mating alignment is required, such as in differential gear casings, engines, and transmissions.

 

We are able to supply or manufacture precision metal dowel pins in metric and imperial sizes. Our manufactured dowels can be of specified diameters, lengths or materials to meet your requirements. 

We have the ability to supply all specification of precision dowel pins to customer requirements either small or large diameter precision dowel pins.

If you have questions about these feels free to give us a call today.

 

FAQs about Precision Dowel Pins

  • What are precision dowel pins and where are they commonly used?

    • Precision dowel pins are cylindrical fasteners designed with tight tolerances to ensure accurate alignment between mechanical components. They are commonly used in applications requiring precise positioning, such as in machinery, manufacturing equipment, and automotive assemblies. These dowel pins play a critical role in maintaining the alignment of parts, preventing lateral movement, and enhancing the overall stability and efficiency of the assembly.

  • What materials are commonly used for manufacturing precision dowel pins?

    • Precision dowel pins are typically made from various materials, including stainless steel, steel, and other alloys. Stainless steel dowel pins are popular due to their corrosion resistance, making them suitable for applications in humid or corrosive environments. Steel dowel pins offer strength and durability, while other alloys may provide specific properties such as heat resistance or lightweight characteristics.

  • What are the key benefits of using precision dowel pins in assemblies?

    • Precision dowel pins offer several advantages:
      Accurate Alignment: Precision dowel pins ensure precise alignment between components, reducing the risk of misalignment and its associated issues.
      Enhanced Stability: Dowel pins prevent movement between parts, resulting in improved stability and performance.
      Reduced Wear: Proper alignment provided by dowel pins minimizes wear and tear on mating components.
      Efficient Assembly: Dowel pins simplify assembly processes by aiding in the precise positioning of parts.

  • How do you determine the appropriate dowel pin size for an application?

    • Selecting the right dowel pin size involves considering several factors:
      Application Requirements: Identify the load, stress, and alignment precision needed.
      Hole Diameter: Measure the hole accurately to match the dowel pin size.
      Material Compatibility: Choose a material such as stainless steel dowels or steel dowels based on the application's conditions.
      Tolerance Specifications: Refer to industry standards like ISO2341B to ensure proper fit.
      Supplier Guidance: Consult experienced suppliers who can provide recommendations based on your specific requirements.

  • Can precision dowel pins be used in high-temperature applications?

    • Yes, precision dowel pins can be used in high-temperature applications if the appropriate material is chosen. Stainless steel dowel pins or other heat-resistant materials are suitable for environments with elevated temperatures. It's essential to consider both the material's temperature resistance and the specific application requirements when selecting dowel pins for high-temperature conditions.

  • Are precision dowel pins reusable?

    • The reusability of precision dowel pins depends on their condition after use. If the dowel pins remain undamaged and within their specified tolerances, they can potentially be reused. However, careful inspection is necessary to ensure that there is no deformation or wear that could compromise their performance. For applications requiring high precision, maintaining the dowel pins' original dimensions is crucial for accurate alignment in subsequent uses.

  • Where can I find high-quality precision dowel pins, including different sizes and materials?

    • Reliable suppliers specializing in fastening solutions offer a wide range of high-quality precision dowel pins. Whether you need various sizes or specific materials such as stainless steel dowels or steel dowels, these suppliers usually have comprehensive catalogs to meet diverse requirements. Industry exhibitions and online platforms are excellent resources to discover reputable suppliers known for providing precision dowel pins that adhere to industry standards and customer preferences.

  • What are the typical applications of precision dowel pins?

    • Precision dowel pins find applications in various industries:
      Manufacturing: Dowel pins ensure accurate alignment in machinery and equipment manufacturing.
      Automotive: Dowel pins play a role in automotive assembly, enhancing component alignment.
      Aerospace: Precision is critical in aerospace applications, making dowel pins valuable for secure alignments.
      Electronics: Dowel pins aid in positioning components within electronic devices and equipment.

  • What are the advantages of using stainless steel precision dowel pins?

    • Stainless steel precision dowel pins offer several benefits:
      Corrosion Resistance: Stainless steel dowels are resistant to corrosion, making them suitable for various environments.
      High Strength: Stainless steel dowel pins provide excellent mechanical strength for demanding applications.
      Temperature Stability: They can withstand a range of temperatures without compromising performance.
      Hygiene: Stainless steel dowel pins are ideal for applications with strict hygiene requirements.
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