Sherline 6840 17″ Ball Screw Benchtop Lathe vs Sherline 8440C 17″ CNC Benchtop Lathe System Package C
Technical comparison · Turning (lathe)
6840 17″ Ball Screw Benchtop Lathe is the most capable in its class. 6840 17″ Ball Screw Benchtop Lathe leads on the available specs (starting with price); 8440C 17″ CNC Benchtop Lathe System Package C makes sense only for non-technical reasons (availability, support, ecosystem), or if the missing data matters in your case. On the category's overall technical index, 6840 17″ Ball Screw Benchtop Lathe scores 100/100 against 63/100 for 8440C 17″ CNC Benchtop Lathe System Package C.
| Parameter |
6840 17″ Ball Screw Benchtop Lathe
Sherline
F2 · Intermediate
|
8440C 17″ CNC Benchtop Lathe System Package C
Sherline
F2 · Intermediate
|
|---|---|---|
| Awards | — | |
| Identity | ||
| Launch year | 2020 | — |
| Use tier | F2 — Intermediate | F2 — Intermediate |
| Price | ||
| Price (€) | ~1400–2000 € | ~2600–2800 € |
| Universal specs | ||
| Dimensions (W×D×H) (cm) | 26.35 × – × 25.4 cm | 28.6 × – × 20.3 cm |
| Weight (kg) | 21.4 kg | 31.4 kg |
| Work area (mm) | 430 × 116 mm | 430 × 110 mm |
| Z-axis height (mm) | 367 mm | — |
| Voltage (V) | 240 V | 240 V |
| Maximum speed | 2800 rpm | 2800 rpm |
| Declared precision | 0.05 mm | 0.0127 mm |
| Category specs | ||
| Swing over bed (mm) | 151 mm | 90 mm |
| Distance between centers (mm) | 430 mm | 430 mm |
| Ecosystem | ||
| Cloud dependency | No | No |
| Software notes | The 6840 is a CNC-ready machine: no controller is included in the base configuration. Buyers may choose from a 4-axis Linux driver box (with LinuxCNC), the Sherline/Acorn controller (based on Centroid CNC12, which supports Intercon conversational CAM), or any third-party controller compatible with NEMA 23 stepper motors. The MASSO G3 Touch is not available as an option on this model and is exclusive to the Accu-Pro line. G-code programs can be generated on any operating system using third-party CAM software. | The system includes a PC running Ubuntu Linux with LinuxCNC pre-installed, along with a 4-axis driver board built into the computer chassis. A CD with complete instructions and utilities to convert CAD files and TrueType fonts into G-code is included. The operator must supply an external monitor; keyboard and mouse are provided. LinuxCNC is an open-source CNC control package running real-time on the Linux kernel and is compatible with standard G-code formats. |
MakerSpecs Awards
Most capable Intermediate
Highest technical score among the 46 Turning (lathe) between €350 and €900 printers: 100/100.
How we assign awards →Nessun riconoscimento in questa fascia.
The differences that matter
- Price: 6840 17″ Ball Screw Benchtop Lathe 1700 € vs 8440C 17″ CNC Benchtop Lathe System Package C 2700 € — 6840 17″ Ball Screw Benchtop Lathe wins (+59%)
- Swing over bed: 6840 17″ Ball Screw Benchtop Lathe 151 mm vs 8440C 17″ CNC Benchtop Lathe System Package C 90 mm — 6840 17″ Ball Screw Benchtop Lathe wins (+68%)
- Work area: 6840 17″ Ball Screw Benchtop Lathe 430×116 mm vs 8440C 17″ CNC Benchtop Lathe System Package C 430×110 mm — 6840 17″ Ball Screw Benchtop Lathe wins (+5%)
Which one to choose
Choose 6840 17″ Ball Screw Benchtop Lathe if…
you value price, swing over bed and work area. It is the most capable in its class.
MakerSpecs is an independent atlas. We don't sell products: this comparison links to both sheets, where you'll find complete data and official links.