The Bernardo BM 25 T / 230 V bench drill is the larger bench model in the BM range with a 305×305 table and a Ø 25 mm capacity, with a drilling capacity in steel up to Ø 25 mm and a Morse taper MT 2 connection. Technical specifications: 16 spindle speeds 220-2,840 rpm with belt and cast iron pulley drive, integrated digital spindle stroke display, LED work light, 305 × 305 mm cast iron table with 16 mm T-slots, tiltable from -45° to +45° and height-adjustable with rack and pinion, cast iron base with T-slots, 1-16 mm keyless chuck with B18 shank included. IP 54 compliant aluminum motor: 0.75 kW (S1) / 1.1 kW (S6) at 230V, spindle stroke 80 mm, max spindle-table distance 415 mm, spindle-base distance 605 mm, weight 57 kg. Distributed in Italy by Krollit as official Bernardo distributor since 2007.
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Drilling capacity steel: Ø 25 mm
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Chuck: 1-16 mm / B 18
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Morse Taper: MT 2
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Spindle speed: 16 speeds 220-2,840 rpm
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Spindle stroke: 80 mm
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Table: 305 × 305 mm with 16 mm T-slots, tiltable ±45°
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Max spindle-table distance: 415 mm
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Spindle-base distance: 605 mm
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Column diameter: 72 mm
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Digital display: spindle stroke
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Motor: 0.75 kW (S1) / 1.1 kW (S6) at 230V
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Weight: 57 kg
Who uses the BM 25 T / 230 V and for what purpose
The Bernardo BM 25 T / 230 V is a professional bench drill with belt and cast iron pulley drive, sized for artisanal workshops, advanced hobbyists, and laboratories that require precision drilling on steel up to Ø 25 mm. Key construction feature: the digital display for the spindle stroke shows the drilling depth during operation, a crucial feature for applications requiring non-through holes of predefined depth (e.g., blind holes for threads, bearing seats, holes for couplings). The 16 step speeds from 220-2,840 rpm allow adaptation to standard materials: hard steels 220-500 rpm for Ø 15-20 mm, mild steels 1,000-1,500 rpm, aluminum and brass 1,500-2,840 rpm. The IP 54 compliant aluminum motor (0.75 kW S1 / 1.1 kW S6) at 230V provides the necessary power for continuous use. The ±45° tiltable table with diagonal T-slots allows for angled drilling without the need for a precision vise. Typical fields of use: artisanal workshops, repair and maintenance of mechanical components, educational laboratories for technical schools, advanced modeling and prototyping, metal hobbyists with higher precision requirements.
Its place in the Bernardo range
The Bernardo bench and pillar drill range is organized into 6 main sub-families: TB (TB 14/16/20 T) entry level with fixed B16 or MT 2 taper and step speeds; BM T (BM 20/25 T) intermediate with digital spindle stroke display and step speeds; BM Vario (BM 16/20 Vario) intermediate with continuously variable speed + centering laser; SBM Vario (SBM 16/20 Vario) pillar drill with higher height than BM Vario; B 430 Vario medium-heavy pillar drill with 360° swiveling table and MT 3 spindle; SB 30 Profi heavy pillar drill with 2-stage power motor, Ø 32 mm capacity. The BM 25 T / 230 V is the BM model with step speeds (16 steps from 220-2,840 rpm) and digital display for the spindle stroke. Compared to the corresponding TB: the BM has a digital stroke display, a superior S1 motor, and a B18 chuck (vs B16 for TB). Compared to the BM Vario: the BM T has step speeds (belt changes for new speed) vs continuous for the Vario, does not have a centering laser, and is economically preferable for use without frequent speed adjustment requirements. For drilling up to Ø 25 mm: the BM 25 T is correctly sized with a 0.75 kW motor and 305×305 mm table superior to the BM 20 T.
Logistics and Krollit support
Bernardo shipping in 5-9 working days (7 days to the South). Manageable weight for two people with care. HSS drill bits, milling chucks, threading devices, LED lamps, original Bernardo spare parts (belts, motors, keyless chucks, conical shafts, T-nuts) available from stock with 3-5 working days shipping. Customer support available in Italian.
Who the BM 25 T / 230 V is for
| Profile |
Compatibility |
Reason |
| Artisanal workshop with daily professional use |
Recommended |
Digital spindle stroke display, IP 54 motor, B18 keyless chuck, ±45° tiltable table with T-slots. Ø 25 mm capacity covers most standard applications. |
| Advanced metal hobbyist |
Recommended |
Professional yet compact machine for home workshop, manageable weight. |
| Workshop with frequent variable speed operations |
Adequate |
For frequent speed adjustment requirements, the corresponding BM Vario with continuous adjustment + centering laser is correctly sized. |
Not suitable for: drilling diameters larger than Ø 25 mm; tall workpieces that cannot be placed on the table (max workpiece height 440 mm with 285×285 table, depends on model); applications requiring speeds below 220 rpm for maximum torque (the SB 30 Profi is correctly sized); massive continuous industrial use (a fixed column drill KBM is correctly sized).
Working capacity
| Specification |
Value |
| Drilling capacity steel |
Ø 25 mm |
| Chuck |
1-16 mm / B 18 |
| Morse taper connection |
MT 2 |
Speed and stroke
| Specification |
Value |
| Spindle speed |
16 speeds 220-2,840 rpm |
| Spindle stroke |
80 mm |
Table and working dimensions
| Specification |
Value |
| Table dimensions |
305 × 305 mm |
| Table T-slots |
16 mm |
| Table tilt |
-45° to +45° |
| Spindle-column distance |
180 mm |
| Max spindle-table distance |
415 mm |
| Spindle-base distance |
605 mm |
| Column diameter |
72 mm |
| Base surface |
205 × 205 mm |
Motor and power supply
| Specification |
Value |
| Motor power S1 100% |
0.75 kW |
| Motor power S6 40% |
1.1 kW |
| Voltage |
230V / 50 Hz |
| Protection standard |
IP 54 |
Dimensions and weight
| Specification |
Value |
| Machine dimensions (L × W × H) |
400 × 630 × 990 mm |
| Weight |
57 kg |
Compliance
| Specification |
Value |
| Marking |
CE |
| Directive |
Machinery Directive 2006/42/EC |
Standard equipment
- Bernardo BM 25 T / 230 V drill
- 1-16 mm / B 18 keyless chuck
- MT 2 / B 18 tapered arbor
- Digital display: spindle stroke
- Integrated LED work light
- T-nut set for workpiece clamping
- Height-adjustable guard with microswitch
- Separate emergency stop switch
- Set of wrenches and service tools
- User manual in Italian
Frequently asked questions
What is the difference between MT 2 taper and B16/B18?
The MT 2 Morse taper (MT 2) is the machine-side spindle connection, sized for self-clamping during rotation. The B18 shank of the keyless chuck (included) is the receptacle for drill bits from Ø 1 to Ø 16 mm.
The Morse taper allows for mounting chucks with MT shanks (for interchangeable use), reduced tapered sleeves (e.g., MT 2 → MT 1 for smaller tools), and drill bits with direct MT shanks (for Ø above 13 mm). The B18 shank is specific for cylindrical-grip keyless chucks. For changing chucks or mounting special tools, compatibility requirements must be observed.
How does the digital spindle stroke display work?
It shows the real-time penetration depth of the drill bit into the workpiece, in millimeters (with 0.1 mm resolution). The operator presses a button to zero the depth at the start of drilling, then monitors the display during operation to stop at the desired depth.
Crucial feature for: non-through holes of predefined depth (blind holes for threads, bearing housings, centering pin recesses), series production with identical depth on multiple workpieces, applications requiring depth precision (e.g., H7 coupling holes with tolerance less than 0.1 mm). Without a digital display, the operator must use a stop collar mounted on the spindle, which provides a standard precision of 0.5-1 mm.
Does the belt drive require maintenance?
Yes, periodic maintenance. V-belts require tension checks every 200-500 operating hours (intensive use) or every 6 months (occasional use). Typical replacement every 3-5 years in normal use, every 1-2 years in intensive use.
Tensioning procedure: open the drive cover, loosen the motor fixing bolt, move the motor to tension the belt (the belt should flex 5-10 mm under manual pressure), tighten the bolt, close the cover. Belt replacement: same procedure but with complete belt replacement. Original Bernardo replacement belts are available from stock with 3-5 working days shipping.
What is the concentricity of the spindle?
For BM bench drills, spindle concentricity is typically 0.03-0.05 mm: a standard value for standard professional applications. For higher precision applications (≤ 0.02 mm), gear-driven drills (GB 30 TV) or CNC drills are correctly sized.
Concentricity is the maximum deviation of the spindle axis from its theoretical axis during rotation. Lower values (more precise) require high-quality bearings, precision shafts, spindle balancing, and careful construction. BM bench drills with 0.03-0.05 mm concentricity are suitable for most professional applications. For precision applications (reaming for H7 couplings, precision bearing holes), gear-driven drills are recommended.
What electrical power supply is needed?
230V voltage: 230V Schuko household/workshop line without three-phase line, standard 16A circuit breaker. Standard cable cross-section 1.5 mm² up to 30 meters.
For workshops with a household line (230V), the 230V model is the correct choice without additional electrical adaptation costs. For workshops with a three-phase line (400V), the 400V model is sized with a higher quality motor and extended lifespan: the three-phase motor has higher efficiency (90% vs 70% for single-phase) with less heat generated and significantly longer lifespan (15-25 years vs 8-15 years for single-phase). For intensive continuous use, the 400V model is preferable.
