The Bernardo KBR 100 x 2000 Duo belt grinder is designed for sanding metal pipes and profiles, featuring an integrated device for pipes Ø 20-76 mm. It offers a 100 × 2,000 mm abrasive belt, belt speed of 15 / 30 m/s (2 speeds), integrated Ø 75 mm dust extraction, and a 2.5 kW (S1) and 3.3 kW (S6 40%) 400V three-phase motor. Machine dimensions are 750 × 1,400 × 1,200 mm, and it weighs 148 kg. Suitable for mechanical workshops, metal fabrication shops, blacksmiths, woodworking shops, and metalworking laboratories. Distributed in Italy by Krollit as the official Bernardo distributor since 2007.
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Abrasive belt: 100 × 2,000 mm
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Belt speed: 15 / 30 m/s (2 speeds)
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Pipe device: Ø 20-76 mm included
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Dust extraction: Ø 75 mm
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Motor (S1 / S6): 2.5 kW / 3.3 kW
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Voltage: 400V three-phase
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Weight: 148 kg
Who uses the KBR 100 x 2000 Duo and for what
The Bernardo KBR 100 × 2000 Duo is a specialized belt grinder for working with metal pipes and profiles. Key design feature: an integrated device for round pipes Ø 20-76 mm with trolley angle adjustment from 30° to 90°, allowing for uniform grinding of the pipe's circular surface. A 100 × 2,000 mm abrasive belt (the longest in the Bernardo range) provides an extended contact surface: the workpiece is ground in a single pass without the need for overlaps that would create visible lines. Dual speed (15 / 30 m/s) for stainless steel, aluminum, and non-ferrous metals. Quick belt and roller change without tools to minimize machine downtime. Automatic spring tensioning for constant belt stability during prolonged operations. Dual 2 × Ø 75 mm extraction for abrasive and metallic dust management. In Krollit customers' workshops, the KBR 100 × 2000 Duo is chosen by specialized tubular fabrication workshops, manufacturers of balustrades, railings, furniture frames, and industrial shelving workshops.
Its place in the range
The Bernardo belt grinder range is organized into 4 models by application: BDS 75 (combined belt 75 + disc 150, 1 speed) and BDS 75-2 (same configuration, 2 speeds) for general workshops with mixed processing; BS 100 × 1220 S-2 (belt only 100 × 1,220, 2 speeds, base) for metal fabrication shops with long welds to finish; KBR 100 × 2000 Duo (belt 100 × 2,000 + pipe device Ø 20-76 mm) for workshops specializing in tubular fabrication.
The KBR 100 × 2000 Duo is the specialized top-of-the-range machine: 2,000 mm long belt, dedicated pipe device, superior dual speed (15/30 m/s vs 9.5/19 for the BS or 11/22 for the BDS), more powerful motor (2.5/3.3 kW). The investment is justified for workshops with regular production of tubular fabrication. For general workshops without pipes, the BDS or BS are significantly more economical.
Krollit logistics and support
Bernardo shipping in 5-9 working days (7 days to the South). With a weight of 148 kg, it requires a pallet jack or two careful people for unloading. Dimensions 750 × 1,400 × 1,200: check the workshop ceiling height. 100 × 2,000 mm abrasive belts, abrasive discs, rollers, accessories, and original Bernardo spare parts available from stock with 3-5 working day shipping. Customer support available in Italian.
Who the KBR 100 x 2000 Duo is for
| Profile |
Compatibility |
Reason |
| Metal hobbyist |
Not recommended |
Professional specialized machine for tubular fabrication: it is excessively sized for hobby use. Consider general-purpose BDS 75 or BDS 75-2. |
| Workshop specializing in tubular fabrication |
Recommended |
Device for pipes Ø 20-76 mm, 2,000 mm belt for continuous surface without overlap lines. Specialized for professional production. |
| Manufacturers of balustrades / railings / furniture frames |
Recommended |
Dual speed (15/30 m/s) for stainless steel, aluminum, non-ferrous metals. Quick belt and roller change without tools minimizes downtime. |
Not recommended for: standard flat surface processing (the general-purpose BDS 75/75-2 are significantly more economical); occasional hobby use (oversized; consider BDS 75); single-phase 230V power supply (all Bernardo grinders require industrial three-phase 400V); use in dusty environments without connected extraction (abrasive metal dust is dangerous for operator health).
Abrasives
| Specification |
Value |
| Abrasive belt |
100 × 2,000 mm |
| Belt speed |
15 / 30 m/s (2 speeds) |
Table inclination
| Specification |
Value |
| Trolley angle adjustment |
30° - 90° |
| Workable pipe diameter |
Ø 20 - 76 mm |
Extraction
| Specification |
Value |
| Extraction diameter |
Ø 75 mm × 2 |
Motor and power supply
| Specification |
Value |
| Motor power S1 100% |
2.5 kW |
| Motor power S6 40% |
3.3 kW |
| Voltage |
400V three-phase / 50 Hz |
Dimensions and weight
| Specification |
Value |
| Machine dimensions (L × D × H) |
750 × 1,400 × 1,200 mm |
| Weight |
148 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
| Directive |
Machinery 2006/42/EC |
Standard equipment
- Bernardo KBR 100 x 2000 Duo belt grinder
- Grinding belt grit 80
- Grinding wheel for pipes 1 1/4'' (42/44 mm)
- Rubber-coated roller
- 2 foldable guards
- 2 dust collection drawers
- Grinding table and support
- Graphite coating for belt smoothness
- Extraction connection Ø 75 mm × 2
- User manual in Italian
Frequently Asked Questions
Why 400V three-phase and not 230V single-phase?
The grinder's 1.1-3.3 kW motor (depending on the model) requires power that a single-phase 230V domestic line cannot stably supply. Industrial three-phase 400V is mandatory for professional use.
For workshops without an industrial three-phase 400V line, it is necessary to request a connection from the electricity provider (typical cost €500-€2,000) or use a single-phase to three-phase converter (cost €200-€800, only suitable for occasional use due to limited duration). For workshops with anticipated continuous use, a dedicated industrial three-phase meter is recommended. Krollit does not sell grinders with single-phase motors: the required power does not allow it.
How to choose the abrasive belt grit?
Low grits (40-60) for aggressive roughing (fast material removal, deburring of raw pieces); medium grits (80-120) for standard workshop finishing; high grits (180-400) for fine pre-polishing finishing. Changing grit requires replacing the abrasive belt or disc.
Abrasive belts are consumables: typical lifespan 2-10 hours of actual work depending on grit and material. For professional use, it is recommended to keep a stock of belts of various grits. Original Bernardo abrasive belts (grit 36, 60, 80, 120, 180, 240) available from stock with 3-5 working day shipping.
What is the graphite coating for?
The graphite coating on the front surface of the belt (the area where the workpiece contacts the belt) significantly reduces friction between the belt and the support, lowering the working temperature and extending the lifespan of the abrasive belt (typically +30-50% compared to belts without coating).
The graphite coating is a design feature on professional Bernardo grinders: it also reduces noise and heat generation on the workpiece, a crucial characteristic for stainless steel processing where excessive heat causes difficult-to-remove overheating stains. For intensive professional use, the coating is a consumable component: replaceable by an authorized Bernardo service center.
Is the machine safe for use by unskilled personnel?
The grinder is an industrial machine that requires basic training on safe use: adherence to guards, use of PPE (glasses, gloves, dust masks), emergency procedures. The machine has standard guards (belt cover, workpiece support, safety switch), but use by untrained personnel carries a risk of serious injury.
For professional environments, staff training is mandatory according to workplace safety regulations (Legislative Decree 81/2008). For vocational schools and educational workshops, the presence of an experienced operator is recommended during student use. The machine is CE marked in accordance with Machinery Directive 2006/42/EC.
How much noise does it generate during operation?
The typical sound level of belt grinders is 80-90 dB during operation under load. For prolonged use in enclosed spaces, the use of ear protection (PPE compliant with EN 352) is mandatory.
The sound level varies based on: belt speed (higher speeds generate more noise), workpiece material (steel makes more noise than wood), abrasive belt condition (worn belts vibrate and make more noise). For shared environments, it is recommended to position the machine in a dedicated room or with acoustic barriers. For professional workshops, a noise risk assessment is mandatory according to Legislative Decree 81/2008.
