M8-M20 (5/16-3/4) Auto-Reversing Tapping Head JSN20

• Capable of tapping M8 (5/16) to M20 (3/4)
• Employing a chatter-free clutch with a unique double spring design
• cushion drive easily allowing a pre-tapped hole to be re-aligned, eliminating cross threading
• Simple to install (arbors supplied separately)
• Included With The Tapping Head: 2 x Rubber Flex Collets, Collet chuck spanners and allen keys
• Head mounting - M20 thread

The reversing tapping head attachment for use with drilling or milling machines with a manual quill. The tapping head is capable of tapping M8 to M20, any size of tap can be held within this range including Imperial.

The tapping head has adjustable torque settings to prevent tap breakage. Utilizing a large knurled knob to easily adjust the torque, which is also numbered for convenience.

Employing a chatter-free clutch with a unique double spring design. This allows automatic disengagement of forward drive and smooth engagement of reverse drive. The reverse drive will retract the tap faster than the forward drive, considerably increasing production. The tapping head mechanism has a cushioned drive providing a self-feed action, ensuring pitch perfect threads.

The cushion drive easily allows a pre-tapped hole to be re-aligned, eliminating cross threading. The collet chuck on the head uses round rubber flex collets to adjust size and locate the tap. Other taps including Imperial can be used if they are within the metric size range, of the tapping head. The rear square end of the tap is held by a self centering two-jaw clamping plate, which also provides the main drive to the tap when in operation.

Simple to install to the machine using standard taper/chuck arbors.

• Machine Tapping Datasheet.pdf
• Rubber Collets Comparison Table

Shipping & Delivery Information

We are committed to providing reliable, flexible delivery options to suit your needs. Here’s everything you need to know about our shipping and delivery process.

Our Couriers

We’ve partnered with trusted couriers to ensure your order arrives safely and on time:

• Royal Mail
• DPD
• DHL
• Palletways (for heavier items)

This variety enables us to offer delivery options tailored to your order size and location.

Same-Day Dispatch

• Order by 2:30 PM GMT/UTC on a working day, and we’ll dispatch all in-stock items the same day.
• Orders placed after this time will be processed on the next working day.

Delivery Times

• UK Orders: 1–5 working days*
• European Orders: 3–10 working days*
• Rest of the World: 4–15 working days*

*Delivery times are estimates and may vary based on your location and courier performance.

Shipping Costs

• Shipping rates are calculated based on the total weight of your order.
• A small additional charge (around 10%) is added for packaging and handling.
• The most suitable delivery option will be automatically selected at checkout.
• If no option is shown, please contact us for assistance.

Special Delivery Options

• Time-specific and Saturday delivery options are available for added convenience.
• These can be selected during checkout, where available.

International Shipping

• We ship to most countries worldwide.
• Simply select your destination at checkout to view available options.
• Import taxes and customs duties are not included in our shipping fees and must be paid upon your goods’ arrival at customs.
  For more information, visit DHL.com or consult your local postal service.

Order Collection

Prefer to collect your order?

• Select Collection as your delivery option at checkout, and we’ll have your order ready for pickup.

Additional Information

• All delivery times are estimates and subject to factors beyond our control, such as customs delays or courier issues.
• For any questions or further assistance, please don’t hesitate to contact us.

Warranty Coverage

Standard Warranty: All products are guaranteed for one year from the date of purchase (unless otherwise specified).

During the warranty period, we will repair or replace any defective products at no charge (return-to-base warranty), excluding normal wear and tear.

Eligibility

To benefit from our warranty, please ensure that:

• The product has been installed and used according to the instructions or user manual provided.
• The product is used for its intended purpose as described in the manual.

Please note: Accidental damage, consequential losses, and misuse are not covered by this warranty.

Exclusions

The following consumable items are not covered:

• Batteries
• Solder tips
• Heating elements