Proth 10" x 20" PSGS-2550AH Hydraulic Surface Grinder - 1986 - Serial 620030

Proth 10" x 20" PSGS-2550AH Hydraulic Surface Grinder

Precision Hydraulic Performance | Industrial Toolroom Grade

The Proth PSGS-2550AH is a high-precision, horizontal-spindle surface grinder engineered for exceptional accuracy and surface finish. Built with a T-shaped base and heavily ribbed cast iron construction, this machine is designed to absorb vibration and eliminate internal stresses, making it a staple for precision toolrooms and production facilities.

Key Features

• Precision Spindle Design: Features a cartridge-type spindle supported by P4 high-precision angular contact bearings. This ensures absolute minimal run-out (under 0.002 mm) and simplifies long-term maintenance.
• Dual-Axis Automation: Equipped with hydraulic longitudinal travel (X-axis) and automatic incremental cross-feed (Z-axis). The longitudinal speeds are steplessly variable for tailored material removal.
• Independent Hydraulic Station: The hydraulic pump and tank are isolated from the main casting to prevent thermal expansion and vibration from affecting the accuracy of the workpiece.
• Advanced Guideways: Utilizes a double-V track design for both the table and saddle, providing maximum support and smooth movement throughout the full travel range.

Technical Specifications

• Working Table Size: 10" x 20" (250 x 500 mm)
• Max. Table Travel: ~21.4" (Longitudinal) x 10.4" (Cross)
• Spindle Motor: 2 HP - 3 HP (Varies by vintage/market)
• Spindle Speed: 3,480 RPM (60Hz) / 2,900 RPM (50Hz)
• Standard Wheel Size: 7" x 1/2" x 1-1/4" (Up to 8" diameter)
• Machine Weight: ~3,000 lbs (Heavy-duty vibration dampening)

Advantages

• Meehanite Castings: All major components are cast from high-grade Meehanite iron, annealed twice to remove metallurgical stress, ensuring the machine stays "true" for decades.
• Centralized Lubrication: Features a centralized automatic lubrication system for all slideways and lead screws, reducing wear and preventing the need for manual oiling.
• Surface Finish Quality: The combination of a precision-balanced spindle and massive structural rigidity allows for mirror-like finishes on hardened tool steels and exotic alloys.
• Operator Control: Ergonomically grouped controls include a fine-feed handwheel for the vertical axis, allowing for precise down-feed adjustments in increments as small as 0.0001".