Simple 90 degree bevelled square rulers may be offered in any size, and are manufactured by the following specifications:
- Rectification and whetstone honing on stainless steel measuring surfaces;
- Honing of control edge.
Simple 90 degree square rulers may be offered in any size, and are manufactured by the following specifications:
- Rectification and damask treatment on standard steel measuring surfaces;
- Rectification and whetstone honing on stainless steel measuring surfaces;
Simple 120 e 135 degree square rulers are manufactured by the following specifications:
- Rectification and damask treatment on standard steel measuring surfaces;
- Rectification and whetstone honing on stainless steel measuring surfaces;
F.lli Rotondi’s Heel square rulers are manufactured by the following specifications:
- Rectification and damask treatment on standard steel measuring surfaces;
- Rectification and whetstone honing on stainless steel measuring surfaces;
They can be manufactured in 90, 120 e 135 degree models.
Absolute Black Granite square rulers are perfectly polished and honed on measuring surfaces and rectified on side surfaces.
Their main specifications are as follows:
- specific weight: 3 Kg/dm³
- thermal dilation ratio: 6×10^-6 / °C
- hardness: ≈ 90 Shore
- elasticity module: E = 8×10^3 Kg/mm²
- Complete rust resistance
- structural stability guaranteed by millennia of aging
Contact us for any inquiry
Cylinders for normality checking are made in laminate Aq.55 UNI663 Cem. e Tem., chromed to thickness on the surface for rust protection. Ringbolts are made of Aq.34 UNI 1755 burnished steel.
All cylinders are honed and rectified.