Bernardo Surface Grinding Machine BSG 40100 PLC

Bernardo BSG 40100 PLC Surface Grinder

The Bernardo BSG 40100 PLC is an industrial-grade surface grinder, designed for grinding large surfaces with high precision and stability. Equipped with a Siemens PLC control with touchscreen, it allows for automated programming of grinding cycles, with adjustable feed rates and automatic return at the end of the program. The 405 x 1020 mm table, with a longitudinal travel of up to 1130 mm and a transverse travel of 450 mm, supports workpieces up to 600 kg thanks to the 400 x 1000 mm magnetic chuck. The servo-assisted vertical feed allows digital adjustments from 0.005 to 0.05 mm, while the Ø 350 mm grinding wheel and 4.0 kW motor ensure consistent power and precision. The reinforced cast iron structure, with a total weight of 3700 kg, guarantees rigidity and absence of vibrations. An ideal machine for production departments and mechanical workshops that require heavy-duty and highly accurate machining.

---

Main features:
CNC tangential grinding machine with Siemens PLC touch
Table 405 x 1020 mm, longitudinal travel 1130 mm, transverse travel 450 mm
Capacity up to 600 kg with 400 x 1000 mm magnetic chuck
Servo-assisted automatic vertical feed (0.005 – 0.05 mm)
Grinding wheel Ø 350 mm, motor 4.0 kW, 1450 rpm
Hydraulic system with separate unit and heat exchanger
Massive cast iron structure, weight 3700 kg for maximum stability
Supplied complete with 2-axis DRO, cooling, demagnetization and accessories

---

Technical specifications

Specification	Value
Brand	Bernardo
Model	BSG 40100 PLC
Table dimensions	405 x 1020 mm
No. / T-slot width	3 / 14 mm
Magnetic chuck	400 x 1000 mm
Max. longitudinal travel	1130 mm
Max. transverse travel	450 mm
Max. distance spindle / table	580 mm
Max. workpiece weight (with plate)	600 kg
Grinding wheel	Ø 350 x 40 x 127 mm
Hydraulic table speed	5 – 25 m/min
Automatic transverse feed	0.5 – 8 mm/stroke
Rapid transverse feed	990 mm/min
Automatic vertical feed	0.005 – 0.05 mm
Rapid vertical feed	480 mm/min
Grinding wheel motor power	4.0 kW
Spindle speed	1450 rpm
Hydraulic pump power	2.2 kW
Vertical feed power	0.5 kW
Machine dimensions (L x W x H)	3100 x 2200 x 1900 mm
Weight	approx. 3700 kg

---

Standard equipment

2-axis digital display ES-12 H with LCD
Siemens SMART-panel IE V3 with touchscreen
Electronic handwheel
Electric magnetic chuck 400 x 1000 mm
Grinding wheel Ø 350 mm with flange
Balancing stand and arbor
Parallel dresser
Diamond dressing tool
Coolant system
Centralized lubrication system
Machine feet
LED work light
Protective covers
Demagnetizing device
Safety splash guards
Tool set

Logistics

Bernardo shipping: 5–9 business days (7 days to Southern Italy). Original spare parts available with 3–5 business day shipping. Customer support in Italian available.

Frequently asked questions

What grinding precision can be achieved with the Bernardo BSG 4 Surface Grinder?

Bernardo surface grinders achieve dimensional tolerances of IT5–IT6 and roughness Ra 0.4–0.8 µm under optimal conditions. Actual precision depends on the condition of the grinding wheel (periodic dressing), workpiece material, coolant, and operator experience.

What does the "PLC" suffix mean in the Bernardo BSG 4 Surface Grinder model?

The PLC suffix indicates that the grinder is equipped with programmable PLC control—it allows setting automatic grinding cycles (number of passes, depth per pass, feed) without manual intervention during the cycle. Compared to the manual version, it reduces cycle times and produces more repeatable results for identical batches of workpieces.

What abrasive wheel to use for steel vs cast iron vs aluminum?

Steel: aluminum oxide (Al₂O₃) A46K–A60K wheel. Cast iron: silicon carbide (SiC) C46K–C60K wheel. Aluminum: silicon carbide C46J–C60J wheel with abundant lubrication. Do not mix different materials on the same wheel—metal residues contaminate the ground surface.

Does the Bernardo BSG 4 Surface Grinder require an integrated coolant?

BSG and FSM surface grinders are equipped with an integrated cooling system—essential for precision grinding on hardened steel to avoid surface burns that alter the material's structure. Always use the appropriate type of coolant for the material being processed.

Are spare parts and grinding wheels available?

Original spare parts available with 3–5 business day shipping. Customer support in Italian available.