Valve Seat and Guide Milling Machine FSG-1500

It's used to machine valve seats on diesel and gasoline cylinder heads, cutting the correct seating angle so the valve seals properly. The FSG-1500 mills seats with 3 cutting angles, in diameters from 0.75 to 2.36 inches (Ø19 to 60 mm). It also comes with a vacuum gauge to check right away whether the valve actually seated, without needing any other equipment. It can also be used as a drill press when needed.

The FSG-1500 mills seats from 0.75 to 2.36 inches (Ø19 to 60 mm), with variable spindle speed from 0 to 350 rpm and a quill feed of 7.87 inches (200 mm). The table holds heads up to 47.2 inches (1,200 mm), with a table-to-spindle distance of 8.98 inches (228 mm). Maximum spindle tilt: 15°. Motor: 1.0 hp / 0.74 kW, 220 V – 60 Hz – 3-phase. ISO 30 taper. Net weight: 2,161 lb (980 kg). Dimensions: 7.0 x 3.0 x 7.5 ft (2.13 x 0.90 x 2.30 m).

Yes, it works for both. The FSG-1500 handles diesel and gasoline heads — from trucks, buses, tractors, passenger cars, and light commercial vehicles. The 47.2-inch (1,200 mm) table accommodates large heavy-duty engine heads. The set of 18 pilot guide shafts covers valve guide diameters from 0.256 to 0.500 inches (Ø6.5 to Ø12.7 mm), and the tool holder capsules cover seats from 0.71 to 2.36 inches (Ø18 to Ø60 mm) — covering the vast majority of engines in the market.

With a manual bench kit, the operator turns the tool by hand with a wrench — the result depends heavily on each person's strength and technique, and it is hard to keep a uniform angle across all seats. With the FSG-1500, the spindle runs at a controlled speed from 0 to 350 rpm with a mechanical feed of 7.87 inches (200 mm), ensuring repeatability and consistent finish on every seat in the head. The included vacuum gauge confirms seating right after machining.

The head is clamped on the table with the special vise and leveled using the included bubble level. The correct pilot guide shaft is inserted into the valve guide to center the tool. The tool holder capsule is selected to match the seat diameter, along with cutting tools at the desired angle (30°, 45°, or 90°). The FSG-1500 spins the spindle between 0 and 350 rpm while the operator feeds 7.87 inches (200 mm) to machine the seat. Afterward, the vacuum gauge checks the valve seating.

The main care points are: regularly lubricating the spindle and movement guides, keeping cutting tools sharp — the FSG-1500 comes with a 0.5 hp tool grinder with a diamond wheel — and checking the pilot guide shafts for play, replacing any that are worn loose. The vacuum gauge should be inspected periodically. Cleaning the ISO 30 tapers before every tool change prevents concentricity errors. A well-maintained machine holds its precision and delivers long service life in valve seat milling.

The FSG-1500 is quoted on demand, and pricing varies with each customer's needs, including accessories, tooling and optional features. With in-house technology developed by Chinelatto in Brazil since 1962, you can count on responsive support from our technical team. Spare parts: many are kept in stock and the others are manufactured within a reasonable lead time. Request a quote at chinelatto.com.br/contact — our sales team will contact you very soon.