Sioux valve seat pilots are specialized tools used during valve seat grinding, a machining process that ensures proper sealing between the valve and the cylinder head in an engine. In essence, Sioux valve seat pilots contribute to high-quality valve seat grinding by promoting accuracy, efficiency, reduced errors, and standardization, all while offering long-lasting durability.

Valve Seat Sioux Style Grinding Pilots:

  1. Function: These pilots act as a guide for the grinding tool that shapes the valve seat. The pilot inserts into the valve guide, which is the hole in the cylinder head that centers the valve stem. By following the pilot's precise diameter, the grinding tool replicates the pilot's shape onto the valve seat.

  2. Sizes: Stones sizes are given below:

      Pilot Size



    4.5 mm

    Sioux Style (11/16” Thread)


     5 mm

    Sioux Style (11/16” Thread)


     5.5 mm

    Sioux Style (11/16” Thread)


    6 mm

    Sioux Style (11/16” Thread)


    7 mm

    Sioux Style (11/16” Thread)


    8 mm

    Sioux Style (11/16” Thread)


    9 mm

    Sioux Style (11/16” Thread)


      10 mm

    Sioux Style (11/16” Thread)


      11 mm

    Sioux Style (11/16” Thread)


      12 mm

    Sioux Style (11/16” Thread)


  3. Material: Typically constructed from durable steel to withstand the wear and tear of the grinding process.

  4. Applications: Primarily used by machinists and engine builders performing valve seat grinding on engines.

Valve Seat Sioux Style Stone Holder:

  1. Compatibility: Ensure the holder matches your Sioux-style grinder's thread size (typically 11/16").

  2. Material: They're usually made from durable steel construction for longevity.

  3. Drive Ball: Heavy Duty Sioux 11/16" Thread Valve Seat Grinding Stone Holder with Star Drive Ball.

  4. Pilot compatibility: Check if the holder works with your preferred pilots for accurate stone alignment.

  5. Ease of use: Look for a design that allows for quick and easy.

Benefits of Using Valve Seat Grinding Pilots:

  1. Accurate Grinding: The most crucial benefit is their ability to ensure precise and consistent valve seat angles. By following the pilot's form, the grinding tool replicates it onto the valve seat, leading to a perfect match between the valve and the seat. This translates to optimal engine performance and sealing.

  2. Improved Efficiency: Sioux pilots expedite the grinding process. Since they guide the grinding tool, machinists don't need to spend time meticulously eyeballing angles and shapes. This saves time and effort.

  3. Reduced Risk of Errors: Manual valve seat grinding without a pilot can be prone to errors. The pilot eliminates human error by offering a physical guide, reducing the chances of grinding an incorrect angle or uneven seat surface.

  4. Durability: These pilots are made from robust materials of steel, Sioux pilots can withstand the demands of repeated grinding jobs without wearing down quickly.

Bulk Order Discounts

We are pleased to offer bulk order discounts to our valued customers. To take advantage of these discounts, please contact us directly with the following information:

Quantity of products:

Please specify the exact number of units you wish to purchase.

Product Details

Clearly identify the products you are interested in, including any specific models, colors, or configurations.

Shipping Address:

Provide your complete shipping address, including street address, city, state, zip code, and country.

Preferred Delivery Date

If you have a preferred delivery date, please let us know so we can make arrangements to meet your timeline.

Once we have this information, we will promptly generate a detailed quote that includes the best possible pricing for your bulk order. Additionally, we will provide express shipping options to ensure your products arrive quickly and safely.

We appreciate your interest in our bulk order discounts and look forward to hearing from you soon.

Shipping Options & Delivery Costs

We offer the following shipping options – DHL Express, USPS, UPS Express without any additional cost to you except few postal codes which comes under Remote Area Delivery (RAD) – If your delivery postal codes comes under RAD then we will charge USD 40 per shipment extra at the time of checkout.

Order Processing Time

All orders placed between Monday to Friday are processed and dispatched within 2 working days. All orders placed during the weekend or on a public holiday will be sent from our warehouse on Monday or on the next business day.

Delivery Address & P.O. Boxes

Please note that we are unable to modify the delivery address once you have placed your order. We are sorry but we do not ship to P.O. boxes

Import / Custom Duties

If your delivery address is in US / Canada / Australia, then please worry free about the import / custom duties because in these countries we will handle the duties levied on our buyers. For rest of the countries mentioned above, your package may be subject to import duties and taxes. You, as the customer, are responsible for paying those fees. We recommend that you check with your local customs office before placing an order on our website as these fees can sometimes be significant and we are unable to calculate these for you.

Tracking Your Order

Once your order has been dispatched, we will send you a confirmation email with tracking information. You will be able to track your package directly on the carrier’s website.

Returns, Refunds, and Exchanges

We want you to be completely happy with your purchase. If you are not happy with the product / services, please contact us on Email: or Phone Number: +91-9466950548, we will either exchange the product or issue full refund to you.

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