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Pneumatic Valve Grinder RV-2 Chinelatto - Double Grinding Wheel
RV-2
Valve Grinder Machine RV-2 Chinelatto - Double Grinding Wheel
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General Line Catalog · 4.3 MB
Frequently Asked Questions
MANUFACTURER
Manufacturer
🇧🇷 CHINELATTO
Model
RV-2
Category
Valve Grinder Machine
Video
▶ YouTube
Catalog
PT · ES · EN
Description
Grinds valves, stems, tappets and rocker arms from Ø0.2-0.49IN (Ø5-12.5MM) with dual wheels at 5,150RPM. High-precision pneumatic cabinet for professional shops with 4 collets included
Technical Specifications
CAPACITY
| Grinding wheel diameter to rectify valve | 127 mm (Ø 5") |
| Grinding wheel diameter to rectify the toe of the valve | 101,6 mm (Ø 4") |
| Valve grinding capacity: Ø minimum ~ maximum | Ø 5,0 - Ø 12,5 mm (Ø 3/16" - Ø 1/2") |
ELETRIC MOTORS
| Grinding wheel rotation | 5.150 rpm |
| Grinding wheel electric motor | 0,5 cv (0.373 kw) |
| Axis door-tong rotation | 267 rpm |
| Electric Motor - Axis door-tong | 1/4 cv (0.246 kw) |
ELECTRIC POWER
| Normal electric power | 220 volts - 60hz - 3 ph |
| Motor power | 0,75 cv |
DIMENSIONS - WEIGHT
| Machine Dimensions (Length x Width x Height) | 0,9 x 0,75 x 1,28 m |
| Running Machine Dimensions (Lenght x Width x Height) | 0,9 x 0,75 x 1,28 m |
| Maritime packing (Length x Width x Height) | 1,0 x 0,86 x 1,4 m |
| Net - Gross Approx. weight | 145 kg / 200 kg |
STANDARD ACCESSORIES
- 01 Grinding wheel Ø 5" x 9/16" and 01 Ø 4" x 1"
- 03 Flat belt installed in machine
- 04 Hardened and ground nozzles
DIAMETER / CAPACITY
- Ø 7 mm / 5 ~ 6,5 mm
- Ø 9 mm / 6,5 ~ 8,5 mm
- Ø 11 mm / 8,5 ~ 10,5 mm
- Ø 13 mm / 10,5 ~ 12,5 mm
- 01 Device for grinding stone rays without diamond
- 03 Hubs nozzle support
- 01 Device with micrometer ring to rectify valve tip with 2 guides
- 02 Measures transferors
- 02 Guidelines for regulating device
- 02 Devices for securing balanceros
- 01 Device to rectify and tridges rays balanceros
OPTIONAL ACCESSORIES
- Diamond
- Hardened and ground nozzles
- Grinding wheel with other diameter
- Technicals specifications subjected to change.
Specifications subject to change without notice. Some capacities listed may require optional accessories. Confirm exact dimensions during quotation.
Demonstration Video
RV-2
Valve Grinder Machine RV-2 Chinelatto - Double Grinding Wheel
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Frequently Asked Questions
▸ What is a pneumatic valve grinding machine used for?
The valve grinding machine is used to correct defects in engine intake and exhaust valves, such as scratches, warping and wear. The RV-2 Chinelatto works with components from 0.197" to 0.492" diameter (Ø5 to 12.5mm), grinding valves, stems, lifters and rocker arms. The pneumatic cabinet ensures high precision in the process, essential for perfect combustion chamber sealing. Widely used in shops that perform cylinder head reconditioning.
▸ What is the maximum capacity of the RV-2 valve grinder?
The RV-2 Chinelatto grinder works with parts from 0.197" minimum to 0.492" maximum diameter (5.0mm to 12.5mm). It comes with 4 included collets covering this entire range: 0.276" (0.197"-0.256" parts), 0.354" (0.256"-0.335" parts), 0.433" (0.335"-0.413" parts) and 0.512" (0.413"-0.492" parts). Grinding wheels spin at 5,150rpm - one 5" (127mm) for valves and another 4" (101.6mm) for stems, lifters and rocker arms. Total 1hp motor at 220V three-phase.
▸ What types of parts can I grind on this machine?
On the RV-2 you grind intake and exhaust valves, valve stems, hydraulic and mechanical lifters, plus rocker arms. It works for car, truck, motorcycle and agricultural machinery engines - as long as parts are between 0.197" and 0.492" diameter (5.0 to 12.5mm). The machine has specific fixtures for each part type, including micrometric adjustment for 30 to 45 degree angles on valve stems.
▸ Difference between pneumatic and manual valve grinder?
Pneumatic grinders like the RV-2 offer much more precision and repeatability than manual machines. The pneumatic cabinet eliminates manual pressure variations, ensuring uniform finish on all parts. The micrometric adjustment system allows fine settings that on manual units depend only on operator skill. For shops doing volume work, pneumatic is more productive and delivers consistent quality, essential when working with tight tolerances.
▸ How does the valve grinding process work?
The valve is secured in the appropriate collet that spins at 267rpm while the 5" grinding wheel (127mm) rotates at 5,150rpm, making the cut. For valve stems the smaller 4" wheel (101.6mm) is used with micrometric fixture. The operator positions the part, adjusts the required angle (30-45°) and activates the pneumatic cabinet for controlled approach. The dual grinding wheel setup allows different operations without changing tools, speeding up production.
▸ What maintenance does the RV-2 valve grinder need?
Basic maintenance includes periodic replacement of the 3 flat belts, bearing lubrication and pneumatic system cleaning. Grinding wheels need dressing with the included device (diamond optional). Collets should be cleaned after use to prevent binding. Regularly check collet spindle alignment and calibrate micrometric adjustment. With proper care, the RV-2 Chinelatto provides years of reliable operation in professional shops.
