SHARS 1″ Shank LH TNSL 16-3D Notch Threading and Grooving Tool Holder

Description

Product Overview

The SHARS 1″ Shank LH TNSL 16-3D Notch Threading and Grooving Tool Holder is engineered for high‑precision machining environments where reliability and repeatability are paramount. Constructed from hardened steel, the holder weighs just 1 pound, offering a balance of robustness and ease of handling. Its 1‑inch shank provides a secure fit in standard collet chucks, while the left‑hand orientation aligns with specific CNC setups that require reverse rotation. The tool holder accommodates NG‑L and NT‑L insert styles, delivering flexibility for a range of threading and grooving applications. With a maximum depth of cut of 0.21 inches and an edge‑to‑insert tip length of 1.25 inches, it enables fine control over material removal, ensuring tight tolerances and smooth surface finishes.

Manufactured by Shars, a trusted name in industrial cutting tools, this holder is part of the 404‑0081 series, recognized for its durability and consistent performance across demanding production runs. The design incorporates a 16‑3D notch geometry that optimizes chip evacuation and reduces heat buildup during high‑speed operations. This geometry, combined with the left‑hand configuration, makes the holder especially suitable for applications such as aerospace component machining, automotive part production, and precision gear manufacturing where intricate thread profiles are required.

Usage

In a CNC machining center, the SHARS tool holder is typically mounted on a rotary spindle that supports left‑hand rotation, allowing the operator to execute threading cycles on the opposite side of the workpiece without re‑orienting the part. This capability streamlines workflow, reduces setup time, and minimizes the risk of misalignment. The holder excels in machining hardened steels, stainless alloys, and exotic materials such as titanium and Inconel, thanks to its rigid construction and precise geometry.

Beyond traditional CNC environments, the holder is also well‑suited for manual indexing machines where the operator manually advances the workpiece for each thread pass. Its ergonomic design facilitates quick insert changes, enabling rapid tool swaps and minimizing downtime. Whether used in high‑volume production lines or in a small‑batch prototyping shop, the SHARS 1″ left‑hand holder delivers consistent thread quality and reduces tool wear, extending the service life of both the holder and the inserts.

Why Choose Us

Choosing the SHARS 1″ LH TNSL 16‑3D holder means selecting a product backed by decades of engineering expertise and a commitment to quality assurance. Each holder undergoes rigorous testing for dimensional accuracy, hardness, and balance to ensure it meets the exacting standards required by modern manufacturing. The use of premium steel alloys and heat‑treatment processes guarantees resistance to deformation and wear, even under continuous high‑speed operation.

Our after‑sales support includes technical assistance from experienced engineers who can help with installation, optimization of cutting parameters, and troubleshooting. We also provide a comprehensive warranty that covers material defects, giving customers confidence in the long‑term reliability of their investment. By integrating this holder into your machining toolkit, you benefit from reduced tool changeover times, improved thread consistency, and lower overall production costs.

Key Features

• Left‑hand orientation enables efficient reverse‑rotation threading, cutting setup time in half.
• 16‑3D notch geometry enhances chip evacuation, reducing heat and extending insert life.
• Robust 1‑lb steel construction provides stability while remaining easy to handle.
• Versatile compatibility with NG‑L and NT‑L inserts allows flexibility across multiple machining tasks.
• Dedicated customer support and warranty ensure peace of mind and reliable performance.

FAQ

What types of inserts are compatible with this holder?

The holder is designed for NG‑L and NT‑L insert styles, which cover a broad range of carbide geometries used for threading, grooving, and profiling operations. This compatibility gives users the freedom to select the optimal insert for the material and thread profile they are machining.

Can this holder be used on a right‑hand spindle?

While the holder is optimized for left‑hand rotation, it can be mounted on a right‑hand spindle if the machine controller supports reverse rotation. However, for best performance and to take full advantage of the 16‑3D notch design, a left‑hand spindle configuration is recommended.

What is the recommended maximum spindle speed?

For most steel alloys, a spindle speed up to 12,000 RPM is suitable. When machining harder materials such as titanium or Inconel, it is advisable to reduce the speed to 8,000 RPM or lower to maintain insert integrity and achieve optimal surface finish.

How do I change the insert safely?

First, disengage the spindle and allow the holder to come to a complete stop. Using a suitable wrench, loosen the holder’s clamping screw, remove the old insert, and place the new insert with the cutting edge oriented correctly. Tighten the screw to the manufacturer‑specified torque (typically 8‑10 Nm) to ensure a secure fit without over‑tightening.

Is there a recommended coolant type for this holder?

Coolant selection depends on the material being machined. For steel and stainless steel, a water‑based coolant with appropriate corrosion inhibitors works well. For harder alloys like titanium, a high‑pressure mist coolant or oil‑based coolant can improve chip evacuation and reduce thermal buildup.