Bernardo GB 30 TV Gear-Driven Drill Press with Automatic Feeds – Drilling Ø 32 mm, Threading M20, Concentricity ≤ 0.02 mm, 12 Speeds 125-3,030 rpm, Automatic Tool Ejector, 1.1 kW Three-Phase Motor, Weight 235 kg
Bernardo GB 30 TV Gear-Driven Drill Press with Automatic Feeds – Drilling Ø 32 mm, Threading M20, Concentricity ≤ 0.02 mm, 12 Speeds 125-3,030 rpm, Automatic Tool Ejector, 1.1 kW Three-Phase Motor, Weight 235 kg is backordered and will ship as soon as it is back in stock.
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Description
The Bernardo GB 30 TV gear drill is a professional machine with hardened and ground gear transmission, spindle concentricity ≤ 0.02 mm for precision drilling. Drilling capacity in steel up to Ø 32 mm, threading up to M20 with right/left reversal. Morse taper MT 3, precision chuck 1-13 mm with B16 shank. 12 spindle speeds 125-3,030 rpm with a 2-speed motor, 3 automatic spindle feeds (0.10 / 0.20 / 0.30 mm/rev), automatic tool ejection system included as standard, coolant pump integrated into the base with 14 mm T-slots. 1.1 kW (S1) / 1.5 kW (S6) 400V three-phase motor, weight approx. 235 kg, machine dimensions 500 × 750 × 1,620 mm (without base). Distributed in Italy by Krollit as official Bernardo distributor since 2007.
- Drilling capacity in steel: Ø 32 mm
- Threading capacity: M20 with automatic reversal
- Morse taper attachment: MT 3
- Spindle speed: 12 speeds 125-3,030 rpm
- Spindle travel: 140 mm
- Base table: 340 × 335 mm with 14 mm T-slots
- Automatic feeds: 0.10 / 0.20 / 0.30 mm/rev
- Automatic tool ejection: included as standard
- Motor: 1.1 kW (S1) / 1.5 kW (S6) at 400V three-phase
- Weight: 235 kg
Who uses the GB 30 TV and for what
The Bernardo GB 30 TV is a professional gear drill with hardened and ground gear transmission instead of the traditional belt transmission of standard drills. Key design feature: hardened and ground gears offer smooth and quiet transmission with spindle concentricity ≤ 0.02 mm, a value typical of professional industrial machines (for comparison: belt drills typically have a concentricity of 0.05-0.1 mm). The GB 30 TV is sized for professional workshops with higher precision requirements: drilling capacity Ø 32 mm and threading up to M20. The 12 speed ranges with a 2-speed motor (125-3030 rpm) allow optimal adaptation to different materials: mild steels 800-1,500 rpm for Ø 10 mm, stainless steels 400-800 rpm, hard materials 200-400 rpm, aluminum and alloys 1,500-3,000 rpm. Three automatic spindle feeds (0.10 / 0.20 / 0.30 mm/rev) allow automated execution. Automatic tool ejection system included as standard: a crucial feature for productions with frequent tool changes. Typical areas of use: precision mechanical workshops requiring high concentricity drilling, technical schools and professional training laboratories, prototyping and one-off production workshops, workshops for machining tough materials that require gear transmission.
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 GB 30 TV is the distinctive model in the Bernardo drill range: the only one with hardened and ground gear transmission instead of the belt transmission of the KBM and DMT models. Drilling capacity Ø 32 mm: comparable to the KBM 32 (industrial fixed-column range) but with superior concentricity (≤ 0.02 mm vs typical 0.05 mm) and precision features (automatic tool ejection, coolant integrated in the base). Weight 235 kg: significantly lighter than the KBM 32 (950 kg): the more compact structure is sized for workshops with limited space and non-daily intensive use. For daily intensive use, the KBM 32 with a more rigid structure is correctly sized; for precision use with frequent tool changes, the GB 30 TV is the correct choice.
Logistics and Krollit support
Bernardo shipping in 5-9 working days (7 days to the South). Weight manageable with a manual pallet truck or two people with care. HSS drill bits in MT cones, milling chucks, threading devices, LED lamps, coolant pumps, original Bernardo spare parts (belts, gears, gaskets, motors) available from stock with 3-5 working day shipping. Customer assistance available in Italian.
Who the GB 30 TV is for
| Profile | Compatibility | Reason |
|---|---|---|
| Precision workshop with high concentricity drilling | Recommended | Hardened and ground gear transmission: concentricity ≤ 0.02 mm. Automatic tool ejection system included as standard. 12 speed ranges (125-3,030 rpm) for optimal adaptation. |
| Prototyping and one-off parts workshop | Recommended | 3 automatic feeds (0.10/0.20/0.30 mm/rev), integrated coolant pump, precision chuck 1-13 mm/B16. Frequent tool changes managed by automatic ejection. |
| Workshop with intensive daily use | Adequate | For continuous intensive daily use, the KBM 32 (more rigid structure 950 kg vs 235 kg) is correctly sized. The GB 30 TV is excellent for frequent precision use but not massive. |
Not suitable for: workshops without a 400V three-phase line; massive continuous use (for heavy series production, the KBM 32 is correctly sized); loads above Ø 32 mm drilling (KBM 40+ models required); environments without 400V three-phase power supply.
Processing capacity
| Specification | Value |
|---|---|
| Drilling capacity in steel | Ø 32 mm |
| Max threading capacity | M20 |
| Morse taper attachment | MT 3 |
| Spindle concentricity | ≤ 0.02 mm |
Speeds and feeds
| Specification | Value |
|---|---|
| Spindle speed | 12 speeds 125-3,030 rpm |
| Spindle travel | 140 mm |
| Spindle feed | 3 ranges 0.10 / 0.20 / 0.30 mm/rev |
Table and working dimensions
| Specification | Value |
|---|---|
| Base table | 340 × 335 mm |
| T-slots | 14 mm |
| Spindle-column distance | 260 mm |
| Max spindle-base distance | 700 mm |
| Column diameter | 110 mm |
Motor and power supply
| Specification | Value |
|---|---|
| Motor power S1 100% | 1.1 kW |
| Motor power S6 40% | 1.5 kW |
| Voltage | 400V three-phase / 50 Hz |
Dimensions and weight
| Specification | Value |
|---|---|
| Machine dimensions (L × W × H) | 500 × 750 × 1,620 mm |
| Weight | 235 kg |
Compliance
| Specification | Value |
|---|---|
| Marking | CE |
| Directive | Machinery 2006/42/EC |
Standard equipment
- Bernardo GB 30 TV Drill
- Integrated cooling device
- Threading device with automatic reversal
- Right/left rotation (R/L)
- Integrated LED work light
- Morse taper sleeve
- Precision chuck 1-13 mm with B16 shank
- Spindle arbor MT 3 / B16
- Taper sleeves MT 3 / 2 and MT 3 / 1
- Automatic tool ejection device
- Coolant pump integrated in the base
- Height-adjustable CE compliant guard
- Service tool kit
- User manual in Italian
Frequently Asked Questions
What is the advantage of gear transmission over belts?
Superior concentricity (≤ 0.02 mm vs 0.05-0.1 mm typical of belt transmissions), smooth and quiet transmission, longer life (hardened and ground gears last significantly longer than belts), no slippage under load (belts can slip under high torque).
Disadvantages of gear transmission: higher cost (the machine costs 30-50% more than an equivalent belt drill), significantly higher weight (235 kg vs 60-150 kg for standard drills), more complex maintenance (gears require periodic lubrication). For precision use, the advantages outweigh the disadvantages; for occasional use, belt drills are economically preferable.
How does the automatic tool ejection system work?
The operator presses a button or actuates a lever to automatically eject the tool from the MT 3 taper of the spindle. The system replaces the traditional procedure that requires inserting a wedge into the spindle nose and hammering to eject the tool.
Main advantage: reduction of tool change time from 15-30 seconds (traditional procedure) to 2-5 seconds (automatic ejection). For productions with frequent tool changes (more than 30 changes/shift), the difference is significant. A crucial feature for prototyping and one-off parts workshops where tool changes are frequent.
Are the 12 speed ranges practically useful?
Yes. The extended range of 125-3,030 rpm covers all standard materials: hard steels 200-400 rpm, alloy steels 400-800 rpm, mild steels 800-1,500 rpm, brass 1,500-2,000 rpm, aluminum 2,000-3,000 rpm. For each tool and material, there is an optimal speed that maximizes tool life and hole quality.
For workshops with multi-material use (various steels + aluminum + brass), the 12 ranges allow optimal adaptation for each process. For workshops specialized in a single material (e.g., only steel), the 4-6 speed range is sufficient. The GB 30 TV is sized for workshops with a variety of operations that justify the flexibility of the 12 speeds.
Is the coolant pump integrated?
Yes, it is integrated into the machine base. The base has 14 mm T-slots and an integrated tank for the coolant: the pump activates the flow of coolant onto the tool during processing via an adjustable tube.
Coolant is essential for: drill bit life (heat reduction prevents decarburization of the cutting edge), hole quality (prevents work hardening of the material, especially for stainless steel and aluminum), chip evacuation (coolant flow removes chips from the work area). Emulsifiable oil in water (5-10% oil) is standard for most steels. For stainless steel, specific neat oil is recommended.
Can I thread M20 with the GB 30 TV?
Yes. The machine has dedicated right/left rotation for threading: the operator manually reverses the direction of rotation when the thread depth is reached. Maximum capacity M20.
For precision threading with rigid taps (HSS or high-speed steel), the GB 30 TV's concentricity of ≤ 0.02 mm is a crucial feature: threads made on less precise spindles may have uneven pitch or taper in the thread. For M22 and larger threads, KBM 32 (M22) or higher models with an integrated automatic reversing threading device are required.
