Bernardo KBM 80 Fixed Column Drill – drilling steel Ø 80 mm, thread...
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Description
The Bernardo KBM 80 fixed column drill is the top model in the KBM range, with drilling capabilities up to Ø 80 mm and an MT 6 taper, designed for heavy industrial production. It can drill steel up to Ø 80 mm and tap threads up to M56 with automatic reversal. Technical specifications include: MT 6 Morse taper, 9 spindle speeds from 40-570 rpm (in steps), automatic spindle feed with 6 ranges from 0.1-0.78 mm/rev, 5.5 kW motor with 800 Nm torque, and a feed force of 30,000 N. It features a 660 × 555 mm cast iron table with 22 mm T-slots, 300 mm table lift, 375 mm spindle-to-column distance, and a maximum 810 mm spindle-to-table distance. Constructed from cast iron, it weighs 2,500 kg and has machine dimensions of 900 × 1,300 × 2,850 mm. Distributed in Italy by Krollit as an official Bernardo distributor since 2007.
- Steel drilling capacity: Ø 80 mm
- Tapping capacity: M56 with automatic reversal
- Morse taper mount: MT 6
- Spindle speed: 9 speeds 40-570 rpm
- Spindle torque: 800 Nm
- Feed force: 30,000 N
- Spindle stroke: 250 mm
- Cast iron table: 660 × 555 mm with 22 mm T-slots
- Table lift: 300 mm
- Motor: 5.5 kW at 400V three-phase
- Weight: 2,500 kg
Who uses the KBM 80 and what for
The Bernardo KBM 80 is a heavy industrial fixed column drill for high-volume mechanical production and heavy engineering. With a drilling capacity of Ø 80 mm and tapping up to M56, it is the largest model in the KBM range, sized for significant industrial workpieces. Its 5.5 kW motor with 800 Nm of torque (5 times the torque of KBM 25/32 models) and 30,000 N feed force (3 times the force of light models) provides the power needed for large-diameter drilling in heavy steels, cast iron, and special materials where smaller machines would fail. It has a heavy cast iron structure, weighing 2,500 kg, with machine dimensions of 900 × 1,300 × 2,850 mm. The MT 6 taper supports large diameter tools (over 50 mm): for drilling diameters of Ø 50-63 mm, the KBM 63 model is correctly sized; for drilling diameters of Ø 63-80 mm, the KBM 80 with MT 6 taper is necessary. Typical application sectors include: heavy engineering (forgings, castings, thick plates), shipbuilding for construction and maintenance of large components, aerospace and railway industries for the production of precision mechanical components, and maintenance workshops for heavy industrial plants.
Its place in the Bernardo range
The Bernardo drill range is organized into 3 main categories: bench drills (DMT 20, BM, TB) for artisanal workshops with occasional use; fixed column drills (KBM 25/32/40/50/63/80) for industrial workshops with high-capacity mechanical production; gear drills (GB 30 TV) for precision workshops requiring superior concentricity. The KBM 63 and KBM 80 are the heavy-duty models in the KBM range, sharing a heavy frame (660×555 mm table, 2,500 kg weight), 5.5 kW motor, and 800 Nm torque. Differences: the KBM 63 has a drilling capacity of Ø 63 mm with an MT 5 taper and M48 tapping; the KBM 80 has a drilling capacity of Ø 80 mm with an MT 6 taper and M56 tapping. For workshops using typical tools from Ø 50-63 mm, the KBM 63 is the correct choice; for workshops using tools up to Ø 80 mm, the KBM 80 with MT 6 taper is necessary (MT 6 tools are significantly more expensive and less common). The heavy KBM models are the top of the Bernardo drill range: for higher capacities, industrial radial drills or dedicated CNC machining centers are required.
Krollit Logistics and Support
Bernardo shipping in 5-9 business days (7 days to Southern Italy). Due to its heavy weight, a crane or heavy-duty pallet truck is required for unloading from the transport vehicle and installation. Internal workshop handling with a forklift or manual pallet truck (at least 1,500 kg capacity). HSS drill bits in MT tapers, milling chucks, tapping devices, LED lamps, coolant pumps, original Bernardo spare parts (belts, gears, gaskets, motors) available from stock with 3-5 business day shipping. Customer support available in Italian.
Who is the KBM 80 for
| Profile | Compatibility | Reason |
|---|---|---|
| Hobbyist or workshop with occasional use | Not recommended | Industrial machine weighing 2,500 kg requiring a 400V three-phase line. For occasional use, DMT 20 bench drills or BM/TB column drills are correctly sized. |
| Heavy engineering (forgings, castings, thick plates) | Recommended | Capacity Ø 80 mm with 5.5 kW motor and 800 Nm torque: sized for heavy drilling on industrial steels. Feed force of 30,000 N. Table 660×555 mm. |
| Naval, railway, aerospace industry | Recommended | Stability of the heavy cast iron structure (2,500 kg) for precision drilling on large components. Spindle speed 40-570 rpm (low range) for maximum torque on large diameter tools. |
Not suitable for: workshops without an adequate industrial 400V three-phase line; environments without space for machine dimensions (900 × 1,300 × 2,850 mm); precision drilling with superior concentricity (for concentricity ≤ 0.02 mm, the GB 30 TV or CNC drills are correctly sized); occasional hobby use (the machine is oversized, consider DMT 20 or BM/TB drills from the bench range).
Machining capacity
| Specification | Value |
|---|---|
| Steel drilling capacity | Ø 80 mm |
| Max tapping capacity | M56 |
| Morse taper mount | MT 6 |
Speeds and feeds
| Specification | Value |
|---|---|
| Spindle speed | 9 speeds 40-570 rpm |
| Spindle torque | 800 Nm |
| Spindle stroke | 250 mm |
| Drill head travel | 260 mm |
| Spindle feed | 6 ranges 0.1-0.78 mm/rev |
| Feed force | 30,000 N |
Table and working dimensions
| Specification | Value |
|---|---|
| Table dimensions | 660 × 555 mm |
| T-slots | 22 mm |
| Table lift | 300 mm |
| Spindle-to-column distance | 375 mm |
| Max spindle-to-table distance | 810 mm |
Motor and power supply
| Specification | Value |
|---|---|
| Motor power | 5.5 kW |
| Voltage | 400V three-phase / 50 Hz |
Dimensions and weight
| Specification | Value |
|---|---|
| Machine dimensions (L × W × H) | 900 × 1,300 × 2,850 mm |
| Weight | 2,500 kg |
Compliance
| Specification | Value |
|---|---|
| Marking | CE |
| Directive | Machinery Directive 2006/42/EC |
Standard equipment
- Bernardo KBM 80 drill
- Integrated cooling device
- Tapping device with automatic reversal
- Right/left rotation (R/L)
- Integrated LED work light
- Morse taper sleeve
- Height-adjustable CE-compliant guard
- Service tool kit
- User manual in Italian
Frequently Asked Questions
What is the difference between MT 6 and other tapers?
The MT 6 Morse taper is dimensioned for tools with a diameter of up to Ø 80 mm. For tools with a larger diameter, a larger Morse taper is necessary (MT 4 for Ø 32-40 mm, MT 5 for Ø 40-63 mm, MT 6 for Ø 63-80 mm).
The Morse taper is an international standard that defines the conical mating between the spindle and the tool: the taper is designed for self-locking during rotation. HSS drill bits, milling cutters, reamers, and tapered reduction sleeves are available in all MT tapers. For B16 or B18 tools (cylindrical with screw clamping), a drill chuck with the machine's MT shank is required: professional keyless chucks are recommended for quick and safe tool changes.
How does the automatic spindle feed work?
The automatic feed lowers the spindle at a constant and adjustable speed depending on the material, eliminating the physical effort of the operator on the manual lever. The 9 feed ranges (0.056-1.8 mm/rev) cover different materials: 0.056-0.1 mm/rev for hard steels, 0.1-0.3 mm/rev for alloy steels, 0.3-0.7 mm/rev for mild steels, 0.7-1.8 mm/rev for aluminum and light alloys.
Correct feed is crucial for: drill bit life (excessive feed causes breakage), hole quality (reduced feed causes slow machining and high burr), machine productivity (optimal feed significantly reduces drilling times). For series production, automatic feed allows for the execution of multiple identical holes without manual intervention: a crucial feature for productivity.
Does M56 tapping require a specific device?
Yes, and it is included as standard equipment. The tapping device with automatic reversal allows for M56 tapping without the need for manual spindle stops: the direction of rotation automatically reverses when the set depth is reached.
Standard tapping procedure: mount the tap in the MT tap holder sleeve, adjust the depth stop, position the workpiece on the table with tapping lubricant. The operator starts the machine, the spindle rotates forward cutting the thread, and when the depth is reached, the direction automatically reverses, retracting the tap. Specific tapping oil for steel (e.g., CutCool, Tapping Fluid) is recommended for thread quality and tap life.
Can I perform precision drilling with this drill?
For standard precision (concentricity 0.05-0.1 mm), yes. For higher precision (concentricity ≤ 0.02 mm), gear drills (GB 30 TV) or CNC drills with precision spindles are correctly sized.
KBM fixed column drills have belt drive with typical industrial standard concentricity. For higher precision applications (precision reaming, drilling for H7 fits), the GB 30 TV with hardened and ground gear transmission offers concentricity ≤ 0.02 mm. For extremely precise industrial applications (concentricity below 0.01 mm), dedicated boring machines or CNC machining centers are required.
What electrical power supply does this machine require?
400V three-phase line with adequate cable cross-section for the 5.5 kW motor: typically 4 mm² up to 30 meters, 6 mm² beyond 30 meters. Dedicated 25A circuit breaker.
For workshops without a three-phase line, electrical upgrades are necessary (typical cost €500-€1,500 for a new three-phase meter + wiring + circuit breaker). For workshops with a three-phase line but undersized cables, the cost is limited to dedicated wiring (€200-€500). Pre-purchase verification recommended: contact a qualified electrician to check the availability of power on the existing meter and the current cable cross-sections.
