The Bernardo BM 25 T / 400 V bench drill is the larger benchtop model in the BM range, featuring a three-phase motor and right/left rotation for threading, 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 drive and cast iron pulleys, integrated digital spindle travel display, LED work light, 305 × 305 mm cast iron table with 16 mm T-slots, inclinable 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 400V three-phase, spindle travel 80 mm, max spindle-table distance 415 mm, spindle-base distance 605 mm, weight 57 kg. Right/left spindle rotation for threading. Distributed in Italy by Krollit as an official Bernardo distributor since 2007.
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Drilling capacity in steel: Ø 25 mm
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Chuck: 1-16 mm / B 18
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Morse taper connection: MT 2
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Spindle speeds: 16 speeds 220-2,840 rpm
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Spindle travel: 80 mm
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Table: 305 × 305 mm with 16 mm T-slots, inclinable ±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 travel
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Right/left rotation: For threading
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Motor: 0.75 kW (S1) / 1.1 kW (S6) at 400V three-phase
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Weight: 57 kg
Who uses the BM 25 T / 400 V and for what
The Bernardo BM 25 T / 400 V is a professional bench drill with belt drive and cast iron pulleys, sized for artisan workshops, advanced hobbyists, and laboratories requiring precision drilling on steel up to Ø 25 mm. Key construction feature: the digital display for spindle travel 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, coupling holes). 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 400V three-phase provides the necessary power for continuous use. The inclinable table ±45° with diagonal T-slots allows angled drilling without the need for a precision vise. The right/left rotation allows threading with a tap (up to M16 in steel) without the need for manual spindle stop: the operator reverses the direction upon reaching the depth. Typical sectors of use: artisan 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 travel 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 greater 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 / 400 V is the BM model with step speeds (16 steps from 220-2,840 rpm) and a digital display for spindle travel. Compared to the corresponding TB: the BM has a digital travel display, a superior S1 motor, and a B18 chuck (vs B16 of the TBs). Compared to the BM Vario: the BM T has step speeds (belt changes for new speed) vs continuous on the Vario, does not have a centering laser, and is more 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 business 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, taper arbors, T-nuts) available from stock with 3-5 business day shipping. Customer support in Italian available.
Who the BM 25 T / 400 V is for
| Profile |
Compatibility |
Reason |
| Artisan workshop with daily professional use |
Recommended |
Digital spindle travel display, IP 54 motor, B18 keyless chuck, inclinable ±45° table with T-slots. Ø 25 mm capacity covers most standard applications. |
| Workshop with frequent M threading operations |
Recommended |
Right/left rotation for threading with a tap without manual spindle stop. |
| Advanced metal hobbyist |
Recommended |
Professional but compact machine for home workshops, manageable weight. |
| Workshop with frequent variable speed operations |
Suitable |
For frequent speed adjustment needs, 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 do not fit on the table (max workpiece height 440 mm with 285×285 table, depends on the model); applications requiring speeds below 220 rpm for maximum torque (the SB 30 Profi is correctly sized); massive continuous industrial use (a KBM fixed pillar drill is correctly sized).
Processing Capacity
| Specification |
Value |
| Drilling capacity in steel |
Ø 25 mm |
| Chuck |
1-16 mm / B 18 |
| Morse taper connection |
MT 2 |
Speed and Travel
| Specification |
Value |
| Spindle speeds |
16 speeds 220-2,840 rpm |
| Spindle travel |
80 mm |
Table and Working Dimensions
| Specification |
Value |
| Table dimensions |
305 × 305 mm |
| Table T-slots |
16 mm |
| Table inclination |
-45° to +45° |
| Spindle-column distance |
180 mm |
| Max spindle-table distance |
415 mm |
| Spindle-base distance |
605 mm |
| Column diameter |
72 mm |
| Base plate 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 |
400V three-phase / 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 2006/42/EC |
Standard Equipment
- Bernardo BM 25 T / 400 V Drill
- Keyless chuck 1-16 mm / B 18
- Taper arbor MT 2 / B 18
- Digital display: spindle travel
- Integrated LED work light
- Right/left spindle rotation function
- Set of T-nuts for workpiece clamping
- Height-adjustable protection with microswitch
- Separate emergency stop switch
- Set of keys and service tools
- User manual in Italian
Frequently Asked Questions
What is the difference between MT 2 and B16/B18 taper?
The Morse taper MT 2 (MT 2) is the machine-side spindle connection, sized for self-clamping during rotation. The B18 shank of the keyless chuck (included) is the holder for drill bits from Ø 1 to Ø 16 mm.
The Morse taper allows mounting of chucks with MT shanks (for interchangeable use), reduced taper sleeves (e.g., MT 2 → MT 1 for smaller tools), direct MT shank drill bits (for Ø above 13 mm). The B18 shank is specific for cylindrical grip keyless chucks. For changing the chuck or mounting special tools, coupling compatibility must be observed.
How does the digital spindle travel 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.
A crucial feature for: non-through holes of predefined depth (blind holes for threads, bearing housings, centering pin slots), 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 depth stop ring mounted on the spindle, which allows standard precision of 0.5-1 mm.
Does the belt drive require maintenance?
Yes, periodically. V-belts require tension checks every 200-500 hours of operation (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 transmission 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 available from stock with 3-5 business day 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 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 (more precise) values require high-quality bearings, precision shafts, spindle balancing, 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 drills are recommended.
What electrical power supply is needed?
400V three-phase voltage: 400V three-phase line with a dedicated 10A miniature circuit breaker. Standard cable cross-section 1.5 mm² up to 30 meters.
For workshops with a domestic 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 generated heat and a significantly longer lifespan (15-25 years vs 8-15 years for single-phase). For intensive continuous use, the 400V model is preferable.
