The Bernardo DMT 25 PFV is a bench drilling machine for professional use, with 25 mm drilling capacity, tapping up to M 20, stepless speed adjustment from 100 to 3,300 rpm and automatic spindle feed as standard. Bernardo is an Austrian machine tool brand, distributed by Krollit, official Bernardo distributor since 2007.
- Max drilling capacity: 25 mm
- Max tapping: M 20 with automatic reverse rotation
- Spindle taper: MT 3
- Stepless spindle speed: 100–620 / 620–3,300 rpm
- Automatic spindle feed: 0–100 mm/min
- Spindle stroke: 135 mm
- Concentricity at spindle: ≤ 0.02 mm
- Motor power: 1.1 kW (S1 100%) / 400 V three-phase
- 252 x 252 mm table with 14 mm T-slots
- Weight: 206 kg
Who uses the DMT 25 PFV and what for
The DMT 25 PFV is designed for machine shops and maintenance departments carrying out repetitive drilling and tapping on steel, cast iron and light alloys. The automatic spindle feed, adjustable from 0 to 100 mm/min, frees the operator during deep batch drilling and keeps cutting pressure constant, extending drill bit life. The tapping device with automatic reverse rotation allows threading up to M 20 directly on the machine, with no subsequent manual tapping. Stepless speed adjustment matches cutting speed to material and diameter without moving belts, a concrete advantage for anyone alternating small diameters at high speed with 20–25 mm holes at low speed.
Krollit logistics and support
Shipping in 5-9 working days. For machines over 200 kg, ground-floor delivery with tail lift included. Technical support available for the entire life of the product. Original Bernardo spare parts available from the Krollit warehouse, Monteforte Irpino (AV), Italy, tel. +39 0825-1494022.
Who the DMT 25 PFV is for
| Profile | Suitability | Reason |
|---|
| Machine shop with batch drilling | Suitable | Automatic feed 0–100 mm/min and adjustable depth stop for repetitive cycles |
| Industrial maintenance department | Suitable | M 20 tapping with automatic reverse and 1.1 kW motor in continuous S1 duty |
| Light steel fabrication | Suitable | 25 mm capacity in steel and table with 14 mm T-slots for workpiece clamping |
| Hobbyist with home workshop | Not suitable | 400 V three-phase supply and 206 kg weight exceed the needs and typical installations of hobby use |
Not suitable for: workshops with single-phase 230 V supply only, as the motor requires a 400 V three-phase network, and for milling operations, since the spindle is not designed for radial loads.
Working capacity
| Max drilling capacity | 25 mm |
| Max tapping | M 20 |
| Spindle stroke | 135 mm |
| Spindle feed | 0–100 mm/min |
| Drill depth stop | Adjustable |
Spindle and speed
| Spindle taper | MT 3 |
| Spindle speed, stepless | 100–620 / 620–3,300 rpm |
| Concentricity measured at spindle | ≤ 0.02 mm |
| Digital speed indication | Standard |
Table and dimensions
| Distance spindle to column | 240 mm |
| Max distance spindle to table | 355 mm |
| Distance spindle to base | 670 mm |
| Column diameter | 85 mm |
| Table size / T-slots | 252 x 252 mm / 14 mm |
| Working surface of base | 365 x 305 mm |
| Machine dimensions (W x D x H) | 600 x 840 x 1,280 mm |
| Weight approx. | 206 kg |
Motor and power supply
| Motor power output S1 100% | 1.1 kW / 400 V |
| Motor power input S6 40% | 1.5 kW / 400 V |
Standard equipment
- Drill chuck 5-20 mm / B 22
- Drill chuck arbor MT 3 / B 22
- Digital speed indication
- Automatic spindle feed
- Morse taper reduction sleeve MT 3 / MT 2
- Thread cutting device
- LED machine light
- Height-adjustable protective cover in accordance with CE standards
Frequently asked questions
Does the Bernardo DMT 25 PFV run on single-phase 230 V power?
No, the motor requires a 400 V three-phase supply. Power output is 1.1 kW in continuous S1 100% duty and 1.5 kW input in S6 40% duty. Before purchasing, check the availability of a three-phase line in the workshop; for single-phase needs, contact Krollit to evaluate alternative models in the Bernardo range.
How does tapping work on the DMT 25 PFV?
The tapping device is included as standard and allows threading up to M 20. Automatic reverse rotation withdraws the tap from the hole at the end of the stroke, with no manual intervention. Combined with the adjustable depth stop, the system delivers repeatable tapping even in blind holes.
What is the automatic spindle feed for?
The automatic feed, adjustable from 0 to 100 mm/min, drives the spindle into the workpiece at constant speed without manual action on the levers. The result is uniform cutting pressure, useful for deep 20-25 mm holes and batch work, with less drill bit wear and greater repeatability of hole finish.
What precision does the DMT 25 PFV spindle offer?
Concentricity measured at the spindle is 0.02 mm or less. This value allows precision drilling and tapping without hole ovalization, a decisive requirement in machining with tight tolerances and when using small-diameter bits at high speed.
How is the rotation speed adjusted?
Speed is steplessly variable over two ranges, 100–620 rpm and 620–3,300 rpm, with digital indication as standard. There is no need to move belts between pulleys: adjustment is continuous, matching cutting speed to bit diameter and material, from small holes in aluminium to 25 mm holes in steel.
Which bits and accessories fit the DMT 25 PFV?
The machine has an MT 3 Morse taper spindle and is supplied with a 5-20 mm drill chuck with B 22 mount, MT 3 / B 22 chuck arbor and MT 3 / MT 2 reduction sleeve. You can therefore use both straight-shank bits in the chuck and MT 3 or MT 2 Morse taper bits and tools mounted directly in the spindle nose.
How is a 206 kg machine delivered?
Krollit ships from the Monteforte Irpino (AV) warehouse, Italy, in 5-9 working days. Above 200 kg, delivery is to ground floor with tail lift included. For installation, provide a bench or stand adequate for the weight and a 400 V three-phase line; technical support is available at +39 0825-1494022.
