Stone Iran

Milling Stone machine

A stone milling machine is a specialized machine tool designed for cutting, slotting, and shaping natural stones such as granite and marble. Spindle motor power typically ranges from 5.5 to 22 kilowatts with rotational speeds between 600 and 6000 rpm. Diamond tool diameter is selected between 100 and 400 millimeters. Cutting depth per pass varies from 2 to 15 millimeters depending on stone hardness. Axis positioning accuracy reaches ±0.02 millimeter with repeatability of ±0.01 millimeter. Cooling systems provide flow rates between 20 and 80 liters per minute to control tool temperature and reduce dust.

The structure is commonly bridge type or gantry design with stress relieved steel frame and hardness above 200 Brinell. Heavy duty linear guideways with high dynamic load capacity and clearance below 0.02 millimeter are applied. Motion transmission is achieved through ball screws or precision rack and pinion systems. X axis travel may range from 2000 to 6000 millimeters and Y axis travel from 1000 to 3000 millimeters. Slab load capacity can reach up to 3000 kilograms. Quality inspection includes vibration testing below 3 millimeters per second and spindle perpendicularity verification.

Milling Stone machine

A stone milling machine is an industrial machine tool designed for cutting, engraving, and profiling hard stones such as granite, travertine, and marble. Spindle motor power typically ranges from 7.5 to 30 kilowatts with output torque up to 180 newton meters. Tool rotational speed is adjustable between 800 and 8000 rpm. Diamond cutter diameter is selected between 120 and 500 millimeters. Effective cutting depth per pass varies from 3 to 20 millimeters depending on stone density. Axis positioning accuracy reaches ±0.015 millimeter with repeatability below ±0.01 millimeter.

The structure is generally bridge type with stress relieved ST52 steel frame and hardness above 210 Brinell. Heavy duty H class linear guideways with high dynamic load capacity and clearance below 0.015 millimeter are applied. Power transmission is achieved through C5 class ball screws or precision ground rack and pinion systems. X axis travel ranges from 2500 to 7000 millimeters and Y axis travel from 1200 to 3500 millimeters. Slab load capacity can reach up to 4000 kilograms. Quality control includes vibration testing below 2.5 millimeters per second and spindle concentricity under 0.01 millimeter.

Frontage stone

Granite is a hard, dense igneous stone composed of quartz, feldspar, and mica crystals, with compressive strength between 100 and 250 MPa. Its bulk density ranges from 2.6 to 2.8 tons per cubic meter, and surface hardness is 6–7 on the Mohs scale, making it suitable for heavy construction and civil engineering projects. High abrasion resistance and low water absorption less than 0.5% ensure long-term durability in outdoor and harsh weather conditions.

The stone structure includes veins and crystals of various sizes that determine uniformity and density. Granite can be cut, polished, and honed for flooring, cladding, curbstones, and paving projects. High thermal and chemical resistance ensures stable performance in industrial and construction environments exposed to acids or heat. Block and slab thickness typically ranges from 2 to 10 cm, adhering to ISO and ASTM standards for cutting and quality control.

Sharpening Oilstones

Sharpening oilstones consist of abrasive particles like alumina or silicon carbide. Particle sizes range from 250 to 800 grit with a tolerance of ±15 grit. They feature 20% to 30% porosity for lubricant retention. Their bulk density is between 2.2 and 2.5 g/cm³. Their hardness is rated 7 to 9 on the Mohs scale. Standard block dimensions are typically 200 x 75 x 25 mm. Their edges are finished to a 0.5 mm precision.

These stones structure combines abrasive grains with ceramic or resin bonds. They use mineral or synthetic oil as lubricant and coolant. The oil flushes swarf particles from the pores. This process prevents surface glazing. The optimal sharpening angle is maintained between 15 and 25 degrees. Manual working speed is typically 0.5 to 1 meter per second. A quality stone can sharpen over 500 household knives.

Keystone Butterfly Valve

The Keystone butterfly valve is one of the most widely used types of butterfly valves in industries such as oil, gas, petrochemical, water and wastewater, HVAC, and pipeline systems. This valve, also known as the Keystone wafer butterfly valve and Keystone lug butterfly valve, features a durable design and precise sealing capability, helping you control fluid flow with minimal pressure drop and maximum efficiency.

For pricing details and technical specifications of various Keystone butterfly valves and to select the best model for your project needs, please contact our sales experts.