Hilma SM-125 Hydraulic Machinist Vise | 5" Jaw | 7,700 lbs Force | Germany

Hilma Type SM-125 Heavy-Duty Hydraulic Machinist Vise

Manufacturer: Roemheld-Hilma (Germany) | Jaw Width: 5" (125mm) | Force: 7,700 lbs

Executive Summary

The Hilma SM-125 is a premium, German-engineered mechanical-hydraulic vise designed for high-precision production and heavy-duty toolroom applications. Renowned for its massive clamping force and "tenths" repeatability, this vise utilizes a self-contained hydraulic power intensifier that allows for incredible holding power with minimal manual effort. Unlike standard mechanical vises, the SM-125 ensures consistent, vibration-free clamping, making it ideal for aggressive milling on CNC vertical and horizontal machining centers.

Technical Specifications

• Jaw Width: 5.00" (125 mm)
• Max Clamping Force: 7,700 lbs (40 kN) – achieved with minimal handle torque
• Clamping Range: 0 – 8.85" (225 mm) standard; expandable with step jaws
• Repeatability: 0.01 mm (0.0004") for high-precision batch production
• Operation: Mechanical-hydraulic (no external pump or hoses required)
• Base Type: Heavy-duty fixed base with hardened and ground steel guideways

Key Performance Features

• Internal Hydraulic Intensifier: Features a "power assist" system where the first stage is mechanical for fast positioning, and the second stage automatically engages a hydraulic piston to apply full high-pressure clamping.
• Industrial Durability: The vise body is constructed from high-quality steel (not cast iron), featuring flame-hardened and ground ways that resist wear and maintain accuracy over decades of use.
• Versatile Workholding: The fixed and sliding jaws are ground to accept a wide variety of Hilma top-tooling, including stepped jaws, prismatic jaws for rounds, and soft jaws for complex geometries.
• Chip & Coolant Protection: The lead screw and hydraulic transmission are fully encapsulated within the carriage, preventing swarf from fouling the mechanism and reducing maintenance downtime.