Irwin 1/4"-20 NC HCS Fractional Tap - Bulk (1320ZR)

The Irwin 1/4"-20 NC HCS Fractional Tap - Bulk (1320ZR) is a high-quality tool engineered for precision and reliability in creating internal threads. This specific model, 1320ZR, is a taper tap, which means it features a gradual cutting action over the first several threads. This design makes it the perfect choice for starting threads in a new hole, especially in through-hole applications where the tap can pass completely through the material. Constructed from high carbon steel (HCS), this tap provides the necessary strength and durability for hand-threading a variety of materials, including brass, aluminum, and mild steel. The 1/4"-20 NC size is a standard and common thread type, making this a versatile and essential addition to any toolbox for general-purpose threading tasks. Whether you're re-threading a stripped hole, repairing a machine, or fabricating a new component, the Irwin 1320ZR delivers consistent and clean results. Its straight flutes are designed to efficiently channel chips away from the cutting action, ensuring a smooth and uninterrupted thread-cutting process.

KEY FEATURES AND BENEFITS:

• Thread Cutting: Designed to cut 1/4"-20 NC (National Coarse) threads with a right-hand cut direction, this tap is ideal for creating new threads or cleaning out old, damaged ones. The 2B thread class of fit ensures a medium-loose fit, which is suitable for most general-purpose fastening applications and helps prevent seizing during assembly.
• High Carbon Steel (HCS) Construction: Crafted from High Carbon Steel, the tap offers a balance of hardness and toughness. This material provides the necessary cutting edge to form threads in a variety of materials, from soft metals like aluminum to harder materials like mild steel, while resisting premature wear.
• Taper Chamfer: The tap features an 8 to 10 thread taper chamfer at the tip. This gradual taper reduces the initial cutting force required, making it easier to start the threading process accurately and preventing the tap from wobbling. It's particularly effective for starting threads in new, unthreaded holes.
• Four Straight Flutes: The four straight flutes are strategically designed to guide the tap and allow for efficient chip removal. As you turn the tap, the flutes channel the cut material chips out of the hole, which helps prevent clogging and ensures a cleaner, more consistent thread with less effort.

SPECIFICATIONS:

• Tap Type: Taper Tap
• Thread Size: 1/4"-20 NC
• Material: High Carbon Steel (HCS)
• Thread Class of Fit: 2B
• Cutting Direction: Right-Hand Cut
• Flutes: 4
• Chamfer: 8-10 Thread Taper

HOW TO USE:

1. Preparation: Drill a hole in the material using the correct tap drill size for a 1/4"-20 NC thread. Ensure the hole is straight and perpendicular to the surface.
2. Lubrication: Apply a suitable cutting fluid or lubricant to the tap and the hole. This will reduce friction, extend the life of the tap, and produce a cleaner thread.
3. Start Threading: Insert the tap into a tap wrench and align it with the drilled hole. Apply light, even pressure downward and slowly turn the tap clockwise (for a right-hand cut). The taper tip will guide the tap and begin the threading process.
4. Cut and Clear: Turn the tap clockwise for about half a turn, then back it up a quarter turn counter-clockwise. This "2 steps forward, 1 step back" motion helps to break the chips and clear them from the cutting flutes, preventing the tap from binding or breaking.
5. Complete the Thread: Continue this process until the tap has passed through the material (for a through-hole) or reached the desired depth (for a blind hole). Keep the pressure even and the tap straight throughout the process.
6. Final Touches: Once the threading is complete, carefully remove the tap and clean any remaining chips from the new threads.

BENEFITS OF USING IRWIN 1/4"-20 NC HCS FRACTIONAL TAP - BULK (1320ZR):

• Reliable Performance: The high carbon steel construction ensures the tap provides consistent and reliable performance for numerous threading projects.
• Ease of Use: The taper chamfer design simplifies the initial threading process, allowing you to start threads accurately with minimal effort, reducing the risk of tap breakage or misthreading.
• Versatility: Ideal for a wide range of materials and applications, from automotive repair to home maintenance, making it a valuable tool for any professional or hobbyist.
• Efficient Chip Removal: The four straight flutes are designed to efficiently channel chips away from the cutting action, preventing build-up and ensuring a smooth cutting experience.
• Standardized Fit: The 2B thread class of fit guarantees compatibility with a wide variety of standard bolts and fasteners, ensuring a functional and secure connection.

FEATURES:

• Fractional size for common threading applications.
• Designed for hand-threading with a standard tap wrench.
• Right-hand cutting direction for standard screw-in motions.
• Bright finish to resist corrosion and wear.
• Standard square shank for secure mounting in a tap handle.
• Designed to produce a class 2B thread for a medium fit.