Bernardo USM 500 Universal Grinding Machine with Extraction
The Bernardo USM 500 Universal Grinding Machine with Extraction combines external cylindrical, surface, and tool grinding functions in a single machine. Thanks to its robust cast iron structure, it ensures stable and vibration-free processing, producing precise results. Used in mechanical workshops, production departments, and technical schools, it improves productivity due to its versatility. It features special spindle bearings for accurate grinding, centralized lubrication, and integrated extraction and cooling system. The inclinable workpiece spindle (-90°/+90°) and grinding head (-100°/+100°) allow for extensive machining possibilities. The worktable can be adjusted manually or hydraulically with a longitudinal travel up to 480 mm. With a total power of 2.5 kW and complete standard accessories (grinding wheels, dividing head, self-centering chuck, internal grinding device), it is a comprehensive machine for universal grinding.
Main Features:
Universal grinding: external cylindrical, surface, and tool in a single machine
Cast iron structure for stable and vibration-free machining
Inclinable workpiece spindle -90° / +90°
Inclinable grinding head -100° / +100°
Table with longitudinal travel up to 480 mm (manual or hydraulic)
External grinding wheel speed 2500 rpm – internal grinding wheel 13,500 rpm
Total installed power 2.5 kW
Complete with extractor, cooling device, and centralized lubrication
Extensive range of standard accessories included
Technical Specifications
| Specification |
Value |
| Brand |
Bernardo |
| Model |
USM 500 with extraction |
| Max. workpiece diameter |
200 mm |
| Distance between centers |
500 mm |
| Surface grinding |
200 x 50 mm |
| External grinding |
Ø 5 – 50 x 400 mm |
| Internal grinding |
Ø 10 – 50 x 75 mm |
| Max. workpiece weight |
10 kg |
| Tailstock (taper) |
MT 2 |
| Tailstock quill travel |
15 mm |
| Workpiece spindle inclination |
-90° / +90° |
| Workpiece spindle speed |
110 / 200 / 300 rpm |
| Self-centering chuck |
Ø 100 mm |
| Grinding head inclination |
-100° / +100° |
| Cross travel |
230 mm |
| Vertical travel |
210 mm |
| Hydraulic longitudinal feed |
0.01 – 6 m/min |
| Max. table travel |
480 mm |
| Table inclination |
-45° / +45° |
| External grinding wheel speed |
2500 rpm |
| External grinding wheel |
Ø 200 x 20 x 75 mm |
| Internal grinding wheel speed |
13,500 rpm |
| Internal grinding wheels |
Ø 26 x 20 x 6 mm / Ø 10 x 10 x 3 mm |
| Grinding wheel motor power |
1.1 kW |
| Total installed power |
2.5 kW |
| Power supply |
400 V |
| Machine dimensions (L x W x H)* |
1500 x 1150 x 1400 mm |
| Weight |
approx. 1300 kg |
| Note |
*without extractor and cooling device |
Standard Equipment
Cooling device
Integrated extractor
Protective guard
Dividing head
4 grinding wheels
3-jaw self-centering chuck Ø 100 mm
Right and left tailstock
Revolving and semi-revolving tailstock
Balancing support
Spindle extensions
Vice for surface grinding
5 pushers
Wheel dresser
Centralized lubrication
Internal grinding device with 2 grinding wheels
Logistics
Bernardo Shipping: 5–9 working days (7 days in Southern Italy). Original spare parts available with 3–5 working day shipping. Customer support available in Italian.
Frequently Asked Questions
Does the USM 500 combine cylindrical, surface, and internal grinding in one machine?
Yes. The Bernardo USM 500 is a complete universal grinding machine: it performs external cylindrical grinding (Ø 5–50 mm, up to 400 mm in length), internal cylindrical grinding (Ø 10–50 mm), surface grinding (200 × 50 mm), and tool grinding. The workpiece spindle is inclinable ±90° and the grinding head ±100°, covering practically any geometry in a single 1,300 kg machine.
What is included in the standard equipment of the USM 500?
The USM 500 includes as standard: cooling device, integrated extractor, dividing head, 4 grinding wheels, 3-jaw self-centering chuck Ø 100 mm, right/left tailstocks, balancing support, vice for surface grinding, wheel dresser, centralized lubrication, and internal grinding device with 2 grinding wheels.
What is the difference between the USM 500 and the URS N grinding machines in the Bernardo range?
The URS N (800, 1000, 1500, 2000, 3000 N) have hydrodynamic spindles for high cylindrical precision and larger distances between centers — suitable for long workpieces and high-precision production. The USM 500 is more versatile (cylindrical + surface + internal in one machine) but with a 500 mm distance between centers and a standard spindle. The USM 500 is the choice for workshops that need to cover different types of grinding on small to medium-sized workpieces.
Does the table have hydraulic feed?
Yes. The table of the USM 500 has a hydraulic longitudinal feed adjustable from 0.01 to 6 m/min with a maximum travel of 480 mm — allowing repeatable automatic cycles without manual intervention for surface and cylindrical grinding in series.
Are spare parts and grinding wheels available?
Original spare parts available with 3–5 working day shipping. Customer support available in Italian.
