4.5mm Quick-Change Insert SES 3.4mm Square Shank DIN 371 M4, Adjustable Torque Limiter - TECWERK

Take advantage of an adjustable safety clutch and secure torque transfer via the square shank to protect taps and reduce downtime; order the quick-change insert directly via Metav Werkzeuge or consult our specialists for fitment advice.

SES Quick-change insert 4.5 mm x 3.4 mm (Size 1) – adjustable safety clutch | TECWERK

The SES Quick-change insert 4.5 mm x 3.4 mm (Size 1) is a compact torque-limiting insert designed for safe M4 tapping to DIN 371 standards.

• Adjustable safety clutch to limit torque
• Prevents tap breakage during tapping
• Torque transfer via 3.4 mm square shank

Engineered protection for reliable tapping

The insert combines an adjustable safety clutch with direct torque transmission over the square shank to prevent sudden tool failure during tapping. This torque-limiting function reduces the risk of tap breakage and the consequential rework, improving process reliability. By disengaging or slipping at preset torque levels, the mechanism protects both the tap and the workpiece, which translates into fewer interruptions and more consistent production runs.

Clear compatibility for workshop integration

Designed for DIN 371 M4 tapping, the compact unit fits shafts requiring a 3.4 mm square drive and is identified as Size 1, making it straightforward to match with corresponding holders. The specification that different shaft sizes need different inserts ensures correct pairing and predictable performance; selecting the correct insert prevents misfit and maintains the intended torque behaviour. This compatibility-focused design simplifies inventory and helps streamline tool change procedures in mixed-size operations.

Reduced downtime through simple interchange and robust design

Because torque is transmitted via the shaft square, the transfer path is mechanically direct and predictable, which helps maintain consistent results across repeated cycles. The quick-change concept speeds up replacement, while the clutch prevents costly tap breakage—together these factors lower maintenance needs and shorten mean time to repair. For production environments where thread quality and uptime matter, this approach supports continuous operation and a measurable reduction in scrap and repair work.

Practical applications and efficiency gains

Ideal for industrial workshops and maintenance tasks that involve M4 threads, this quick-change insert is suited to repetitive tapping where mechanical protection is essential. The adjustable limit allows tuning to specific materials and thread conditions, improving thread integrity and operator confidence. When integrated into a standard tapping workflow, it helps secure process stability and supports cost-effective operation by cutting the frequency of tool failure and intervention.

Contact Metav Werkzeuge today for personalised advice on fitment and availability of the TECWERK SES quick-change insert and to confirm the correct insert for a specific shaft size

Technical data

• Article number: 4000832661NW
• Product: Quick-change insert SES (Size 1)
• Designation: SES 4.5 mm x 3.4 mm for DIN 371 M4
• Manufacturer: TECWERK
• Packaging unit: 1

Dimensions

• Diameter: 4.5 mm
• Square shank: 3.4 mm
• Suitable for: DIN 371 M4
• L1: 18.5 mm
• L3: 24.5 mm
• L4: 21.5 mm
• L5: 25.5 mm
• D: 32 mm
• D1: 19 mm

Special features

• Adjustable safety clutch for torque limiting
• Designed to prevent tap breakage
• Torque transmission via shaft square
• Different inserts required for different shank sizes
• Type/size: Size 1

FAQ

How does the adjustable clutch protect taps during tapping?
The adjustable clutch slips or disengages at a preset torque level, so the SES quick-change insert absorbs overloads and prevents tap breakage by limiting the torque transmitted to the tap.

Is this insert suitable for standard M4 taps?
Yes, the insert is specified for DIN 371 M4 tapping and is manufactured to fit the corresponding tap and holder dimensions.

What shank size does the insert require?
This Size 1 insert uses a 3.4 mm square shank for torque transfer; different shaft measures require matching inserts.

Can the torque limit be adapted for different materials?
The adjustable safety clutch permits setting the torque threshold to suit different materials and cutting conditions, helping to protect both tool and workpiece.

Will using the insert reduce workshop downtime?
By preventing tap breakage and enabling quick changes, the insert supports shorter repair times and more consistent cycles, contributing to reduced downtime.

TECWERK: Manufacturer/Responsible: NORDWEST Handel AG, Robert-Schuman-Straße 17, 44263 Dortmund