Boccassini Special Taps and Dies, 100 years experience

Oversized Taps

When components are plated, coated, or heat treated after machining, standard thread dimensions can drift out of tolerance. Boccassini oversized taps are engineered with a precisely increased pitch diameter so that, once finishing is complete, the thread lands exactly where it should—no rework, no surprises.

The range covers metric, UN and GAS forms, with controlled oversizes from +0.05 to +0.50 mm, and dedicated gas thread allowances, giving process engineers confidence when downstream treatments are part of the specification.

As a threading specialist with 100+ years of experience and short lead times for engineered tools, Boccassini offers three engagement models to fit your need: ready on stock special tolerances, make to order variants compliant with existing norms, and full engineering to order development based on drawings or samples. This combination ensures speed without compromising precision.

Trapezoidal Taps

For linear motion systems that demand strength, smoothness, and repeatability, Boccassini trapezoidal taps cut the classic metric trapezoid profile (30°) used on lead screws, vises, presses, and CNC positioning screws.

The program includes straight fluted designs tuned for short chipping materials such as brass and cast iron, and spiral fluted designs—including interrupted thread options—for soft steels, aluminum, and bronze where chip control is critical. Recommended threading depth is ≤2×D, ensuring reliable performance and consistent geometry in production.

To further stabilize torque and surface finish, Boccassini offers a portfolio of advanced coatings (e.g., TiN, TiCN, ZHL) applied by leading partners—selected to reduce friction, improve wear resistance, and extend life in abrasive materials or marginal cooling conditions.

ACME Taps

Where imperial standards prevail, Boccassini ACME taps deliver the robust 29° profile trusted in screw jacks, actuators, vises, and machine tool lead screws. The geometry is optimized for load carrying efficiency and smooth, low friction engagement over long duty cycles.

Boccassini’s portfolio spans both straight fluted and spiral fluted options to match chip behavior and material class, supporting consistent thread form and repeatability across batch production. (ACME and trapezium threads are part of the brand’s core standard thread families.)

Performance can be tailored with proven surface treatments—TiN, TiCN, ZHL—to resist wear, mitigate adhesive tendencies, and stabilize cutting forces in demanding alloys or high temperature conditions.

Coolant Through Taps

Deep holes, abrasive alloys, and tight cycle times demand stable cutting conditions. Boccassini coolant through taps route fluid directly to the cutting zone via internal channels—both axial (IK) and radial (IKR) configurations are available—so chips evacuate cleanly, heat is controlled, and torque stays predictable. The result is a cleaner thread and longer, more consistent tool life at elevated speeds.

For extra margin in tough materials, coatings such as ZHL or TiN can be specified to further reduce friction and protect the edges. These solutions are widely applied in aerospace, medical, and automotive environments, where process capability and traceable quality are non-negotiable—and where Boccassini’s specialization in threading tools makes a measurable difference in uptime and finish.

Special Dies

When a standard die won’t solve the problem, Boccassini special dies do. The company runs a three path model to match urgency and complexity: ready on stock special tolerances for standard threads (including metric classes like 6G/6E/7H/8G and oversizes up to +0.50 mm, plus gas thread allowances), make to order profiles compliant with norms (DIN round, SGF/SGS asymmetric, Diwidag, Spiralock, and more), and full engineering to order development around your drawing, sample, or performance target.

Boccassini supplies round and bell dies, dies with mounting holes for automatic machines, and adjustable designs—solutions trusted in oil & gas and shipbuilding/marine supply chains, as well as heavy maintenance and precision engineering. Short delivery times for custom tools and global application expertise complete the package.