Johnford SLM-120A+B+C+Y
Image: johnford.com.tw, Johnford
Key Specifications
Max Spindle
Tool Capacity
Rapid Traverse
Spindle Power
control
swing over bed
How much does the Johnford SLM-120A+B+C+Y cost?
Price estimate
We do not have a price for the Johnford SLM-120A+B+C+Y that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
With ±475 mm (±18.7 in) of Y travel, the Johnford SLM-120A+B+C+Y gives its milling spindle a long reach across the part. It is a single-spindle multitasking machine with Ø1,150 mm (45.3 in) of turning diameter, 3,000 mm (118.1 in) of Z travel and a tailstock.
That Y stroke changes what can be milled without rotating the part. Flats, pockets and bolt patterns well away from the center line of a large-diameter workpiece are reached by moving the tool rather than by indexing C, and the X axis adds -50 / +960 mm. The milling spindle is a CAPTO C6 unit at 15,000 rpm, rated 18.5 kW (S1) / 23.1 kW (peak) and 61.6 / 78 Nm (45 / 58 lb-ft), swivelling from -30° to +190° on B.
A mismatch is worth seeing clearly. The machine swings Ø1,320 mm (52 in) over the bed, yet the main spindle is an A2-8 unit with a 12 in chuck, a Ø115 mm (4.5 in) bore and Ø91 mm (3.6 in) bar capacity, belt-driven at 22 / 32 kW (29.5 / 42.9 hp) and 457 / 664 Nm (337 / 490 lb-ft). The page says stronger spindles are available; as listed, this is a machine for large but light parts, or for parts where milling dominates.
The tailstock travels 2,750 mm (108.3 in) and has a Ø250 mm (9.8 in) quill with MT#7 taper. Rapids are 20 m/min. Weight is 30,000 kg (66,138 lb).
Full Specifications
| Parameter | Value |
|---|---|
| CNC Control | Siemens SINUMERIK 840D SL |
| Swing Over Bed | Ø1,320 mm (Ø52 in) |
| Max Turning Diameter | Ø1,150 mm (Ø45.3 in) |
| Distance Between Centers | 3,346 mm (131.7 in) |
| Chuck Size | 3-jaw hydraulic 12 in |
| Bar Capacity | Ø91 mm (Ø3.6 in) |
| Spindle Nose | A2-8 |
| Spindle Bore | Ø115 mm (Ø4.5 in) |
| Spindle Transmission | One Step |
| Max Spindle Speed | 3,000 rpm |
| Spindle Motor Power | 22 / 32 kW (29.5 / 42.9 hp) (Belt type) |
| Spindle Torque | 457 / 664 Nm (337 / 490 lb-ft) |
| Milling Spindle Taper | CAPTO C6 |
| Milling Spindle Power | 18.5 kW (S1) / 23.1 kW (peak) (24.8 / 31.0 hp) |
| Milling Spindle Torque | 61.6 / 78 Nm (45 / 58 lb-ft) |
| Milling Spindle Speed | 15,000 rpm |
| B Axis Range | -30°~+190° |
| B Axis Indexing | Every 5° (Std.) / 2.5° (Opt.) |
| B Axis Positioning Hydraulic Brake | Free Angle 0.001° |
| C Axis Resolution | 0.001° |
| Tool Capacity | 40 |
| Max Tool Diameter (full magazine) | Ø75 mm (Ø3 in) |
| Max Tool Diameter Without Adjacent Tools | Ø100 mm (Ø3.9 in) |
| Max Tool Weight | 10 kg (22 lb) |
| Max Tool Length | 320 mm (12.6 in) |
| X Axis Travel | -50 / +960 mm (-2 / +37.8 in) |
| Y Axis Travel | ±475 mm (±18.7 in) |
| Z Axis Travel | 3,000 mm (118.1 in) |
| Rapid Traverse Rate | X: 20 m/min (787 ipm); Y: 20 m/min (787 ipm); Z: 20 m/min (787 ipm) |
| Tailstock Travel | 2,750 mm (108.3 in) |
| Tailstock Quill Travel | 150 mm (5.9 in) |
| Tailstock Quill Diameter | Ø250 mm (Ø9.8 in) |
| Tailstock Taper | MT#7 |
| Tailstock Quill Type | A2-8 |
| Servo Motor X | 8.2 kW |
| Servo Motor Y | 4.4 kW |
| Servo Motor Z | 6.28 kW |
| Servo Motor W | 6.28 kW |
| Servo Motor B | 2.3 kW |
| Machine Weight | 30,000 kg (66,138 lb) |
| Machine Dimensions | 11,255 x 5,830 x 4,195 mm (443.1 x 229.5 x 165.2 in) |
Specifications sourced from johnford.com.tw — verified 2026-10-04
Strengths & Limitations
Strengths
- Y travel of ±475 mm (±18.7 in)
- Ø1,150 mm (45.3 in) maximum turning diameter and 3,000 mm (118.1 in) of Z travel
- CAPTO C6 milling/turning spindle at 15,000 rpm with 40 tools
- Linear scales on X, Y and Z as standard
- Tailstock with Ø250 mm (9.8 in) quill, MT#7, 2,750 mm (108.3 in) of travel
Limitations
- 12 in chuck and A2-8 nose on a machine with Ø1,320 mm (52 in) of swing
- Bar capacity of Ø91 mm (3.6 in)
- Milling spindle torque of 61.6 / 78 Nm (45 / 58 lb-ft)
- 30,000 kg (66,138 lb) and 11,255 x 5,830 mm (443.1 x 229.5 in) of floor
Best For
Frequently Asked Questions
01
±475 mm (±18.7 in) lets the milling spindle work off-center across most of a large part without re-indexing the C axis. By comparison the SLM-65-2S+B+C+Y has ±130 mm (±5.1 in).
02
An A2-8 nose with a Ø115 mm (4.5 in) bore, a 3-jaw hydraulic 12 in chuck and a one-step, belt-type drive: 22 / 32 kW (29.5 / 42.9 hp), 457 / 664 Nm (337 / 490 lb-ft) and 3,000 rpm. The page states that a stronger main spindle is available.
03
Yes, as an option. The standard machine has a programmable hydraulic tailstock with a rotary MT#7 quill; a sub-spindle system instead of the tailstock is on the optional accessory list.
04
Coolant through the milling spindle at 20 bar with a cartridge type filtration system, an external coolant supply at the spindle nozzles of 6 ~ 7 bar, and linear scales on X, Y and Z. CTS at 70 bar and a paper filtration system are optional.
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