Bernardo KNF 2 Double Dovetail Milling Machine - two grooves per cycle, 0.85 kW motor, 32,000 rpm
Bernardo KNF 2 Double Dovetail Milling Machine - two grooves per cycle, 0.85 kW motor, 32,000 rpm is backordered and will ship as soon as it is back in stock.
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Description
The Bernardo KNF 2 double dovetail milling machine cuts two grooves simultaneously in a single lever operation, with a 0.85 kW 230V single-phase motor, rotation speed of 32,000 rpm, cutter spacing of 28 mm, cutter holder diameter of 6 mm, milling depth of 0-55 mm, table dimensions of 380×220 mm, max profile width of 185 mm, and max clearance of 85 mm. Suitable for joints on wide elements (handrails, segmented arches, corner benches, curved windows, frames). Weight 16 kg. Manufactured in Austria, distributed in Italy by Krollit as an official Bernardo distributor since 2007.
- Grooves per cycle: 2 simultaneously
- Rotation speed: 32,000 rpm
- Motor: 0.85 kW – 230V single-phase
- Cutter spacing: 28 mm
- Milling depth: 0 – 55 mm
- Max profile width: 185 mm
- Weight: 16 kg
Who uses the KNF 2 and for what
The Bernardo KNF 2 is a double manual milling machine sized for series production of symmetrical dovetail joints. It cuts two parallel grooves at a fixed distance of 28 mm in a single lever operation: clamp workpiece, mill, release. The advantage over the KNF 1 is quantitative: it halves the time for operations where the joint requires two paired grooves, typical for handrails, segmented arches, corner benches, and curved windows. The motor with integrated automatic start/stop engages both cutters when the lever is pressed and stops them when released, reducing power consumption and cutter wear during pauses between cycles. The 2 W-2 cutters supplied cover the standard setup, and the fixed 28 mm distance geometry offers repeatability without setup. In Krollit customer workshops, it is chosen by carpentry shops with series production of wide elements, carpenters working on handrails and railings, and craft workshops with regular consumption of double joints.
Its place in the Bernardo range
The KNF 2 is the double version of Bernardo's KNF family. Below it is the KNF 1 (single cutter, 10 kg weight) for standard single-groove joints. The fixed 28 mm distance between the cutters is a design choice: it represents the standard for light carpentry joints. For different distances, there is no adjustment available; the KNF 2 is optimized for its specific setup. For workshops that frequently produce double 28 mm joints, the KNF 2 quickly repays the investment (times are halved compared to 2 passes on the KNF 1). For workshops with variable needs for groove spacing, the KNF 1 with two passes allows working on any spacing.
Krollit logistics and support
Bernardo shipping in 5-9 business days (7 days to Southern Italy). At 16 kg, it is shipped in protective packaging and handled by one person. Dovetail cutters W-2, side guides, and original Bernardo spare parts are available from stock with 3-5 business day shipping. Customer support available in Italian.
Who is the KNF 2 for?
| Profile | Suitability | Reason |
|---|---|---|
| Passionate hobbyist | Adequate | Oversized for occasional hobby use. For occasional use, the KNF 1 is simpler and more economical. |
| Carpentry workshop with series production of handrails/railings | Recommended | Fixed 28 mm distance between cutters is the standard for double joints typical of handrails. Cuts two grooves per cycle, halving the time. |
| Carpentry with wide panels and arches | Recommended | For symmetrical joints on wide elements (corner benches, segmented arches, curved windows), the double groove in a single operation significantly speeds up production. |
Not suitable for: operations with groove distances other than 28 mm (the distance is fixed, not adjustable); single-groove joints (the KNF 1 is the correct choice); pieces over 185 mm wide or over 85 mm clear height; occasional hobby production (oversizing).
Double milling capacity
| Specification | Value |
|---|---|
| Grooves per cycle | 2 simultaneously |
| Cutter spacing | 28 mm (fixed) |
| Cutter holder diameter | 6 mm |
| Milling depth | 0 – 55 mm |
| Max profile width | 185 mm |
| Max clearance | 85 mm |
| Guide length | 390 mm |
Table
| Specification | Value |
|---|---|
| Table dimensions | 380 × 220 mm |
Motor and speed
| Specification | Value |
|---|---|
| Rotation speed | 32,000 rpm |
| Motor power | 0.85 kW |
| Power supply | 230V – 50Hz – single-phase |
| Start/stop | Automatic via lever |
Dimensions and weight
| Specification | Value |
|---|---|
| Machine dimensions (L × W × H) | 400 × 500 × 730 mm |
| Weight | 16 kg |
Compliance
| Specification | Value |
|---|---|
| Marking | CE |
Standard equipment
- Bernardo KNF 2 double milling machine
- 2 W-2 type slot cutters
- 45° angle guide
- 2 side guides
- Manual presser
Frequently asked questions
When does it make sense to choose the KNF 2 instead of the KNF 1?
When the work regularly requires two parallel grooves at a distance of 28 mm. The KNF 2 halves the time compared to 2 passes on the KNF 1. For single-groove joints, the KNF 1 is correctly sized.
The analysis is quantitative: for workshops that regularly make standard double joints, the time saved (halving the cycle) repays the price difference in a few months of intensive use. For workshops with predominantly occasional or variable use, the KNF 1 with two passes is more flexible.
Can I vary the distance between the cutters?
No. The 28 mm distance is fixed, by design. For different distances, the KNF 1 is needed with two consecutive passes.
The fixed distance is a design choice that optimizes the machine for standard light carpentry joints (handrails, railings, panels). Applications with different distances are less frequent, and it is reasonable to manage them with the KNF 1. For production at different fixed distances, contact Krollit to check the availability of custom Bernardo versions.
Is the lever with automatic start/stop really convenient?
Yes. Pressing the lever starts both cutters and clamps the workpiece simultaneously; releasing it stops them. It reduces steps, sequence errors, electricity consumption, and wear.
On the KNF 1, the operator must manage the workpiece and cutter in two separate movements. The KNF 2 with an integrated lever simplifies the cycle: a single action activates the entire system. For high-volume series production, this ergonomics significantly reduces operator fatigue and cycle time.
Do the cutters wear out at the same rate?
Under suitable conditions, yes, but in practice, one may wear out slightly faster due to workpiece or operator asymmetries. It is recommended to replace both together to maintain symmetrical processing.
The 2 original Bernardo W-2 cutters work as a pair: replacing only one creates performance differences that can result in grooves of slightly different depths. For precision production, replace both when one shows wear. Original Bernardo spare cutters are available from stock with 3-5 business day shipping.
Is the KNF 2 suitable for construction site use or only in the workshop?
Suitable for occasional construction site use (16 kg weight manageable by one person). For predominant construction site use, the KNF 1 (10 kg) is more portable.
The KNF 2 is sized for predominant use in a workshop/laboratory where it remains fixed for regular production. The dimensions of 400×500×730 mm and 16 kg allow for occasional transport to a construction site but are not optimized for daily portability. For construction sites with repeated double joint requirements, consider setting up a fixed workstation with power or using the KNF 1 in double pass mode.
