Eifco E-skive Power Skiving Machines
Power skiving cuts internal and external gears and splines with a continuous generating motion, several times faster than shaping and without the through-hole a broach needs. The Eifco E-skive 250/320 handles workpieces to 320 mm (12.6 in) and module 4; the E-skive 500 handles 500 mm (19.7 in) and module 6. Both are 6-axis CNC machines with HSK cutter spindles, precision roller linear guides and an electronic gearbox. CTI-USA is the North American distributor and service contact for Eifco and supplies the CTI power skiving cutters that the machines run.
Where power skiving fits
Power skiving generates the tooth by rolling a gear-shaped cutter against the blank at a crossed-axis angle while both rotate in time, so material is removed continuously rather than stroke by stroke. Compared with shaping, cycle times for internal gears and splines drop sharply. Compared with broaching, there is no dedicated broach per part and no through-hole requirement, so blind and stepped internal gears are within reach. It calls for a rigid machine, accurate spindle synchronization and a purpose-designed cutter, which is why machine and tool should come from the same conversation. See our guide to hobbing, shaping and broaching for where each process fits.
E-skive technical data
| Technical data | E-skive 250/320 | E-skive 500 |
|---|---|---|
| Max. workpiece diameter, mm (in) | 250 / 320 (9.8 / 12.6) | 500 (19.7) |
| Max. module in steel | 4 | 6 |
| Spindle nose to table surface, min–max, mm | 100–600 | 180–830 |
| Cutter spindle interface | HSK-C100 | HSK-C160 |
| Work table diameter, mm (in) | 400 (15.7) | 500 (19.7) |
| Max. work table speed, rpm | 2,900 | 1,000 |
| Max. cutter spindle speed, rpm | 3,000 | 2,200 |
| Head rotation angle | 25° | 25° |
| X-axis stroke, mm (in) | 350 (13.8) | 500 (19.7) |
| Y-axis stroke, mm (in) | 400 (15.7) | 400 (15.7) |
| Z-axis stroke, mm (in) | 500 (19.7) | 650 (25.6) |
| Machine weight, approx. metric tons (lb) | 12 (26,500) | 16 (35,300) |
Axes and construction
- Precision roller-type linear guides on the Z and X axes.
- Axial (Z), radial (X) and tangential (Y) feeds infinitely variable through precision ball screws driven by AC servo motors.
- Cutter helix compensation (A axis), servo driven and infinitely variable.
- Precision cutter spindle (B axis) and work spindle (C axis).
Standard features
- 6-axis CNC system with electronic gearbox.
- Remote manual pulse generator and built-in power-failure module.
- Cuts spur, helical and spline gears, internal and external.
- Automatic pressurized lubrication.
- Software modules: lead correction, measurement-over-pins (MOP) and span correction, lead crowning and taper skiving.
- Automatic thermal compensation on the X axis.
- Spindle load monitoring.
Cutters for the machine
Power skiving cutters are designed for the part, the machine's crossed-axis angle and the cutter spindle interface. Capital Tool Industries manufactures power skiving cutters alongside its hobs and shaper cutters, in powder-metallurgy high-speed steels with coatings matched to the workpiece. CTI-USA specifies the cutters from your prints and delivers them with the machine.
Request a quote or an application review
Send us the part print, material, hardness and annual volume. We will confirm that skiving is the right process, recommend the model, and quote the machine with its cutters. Email sales@cti-usa.co, call 330-962-8160, or use the request form.
Frequently asked questions
What is power skiving?
A continuous generating process in which a gear-shaped cutter and the workpiece rotate in time at a crossed-axis angle, so the cutter slices along the tooth space. It cuts internal and external gears and splines much faster than shaping and without a dedicated broach.
What parts suit power skiving?
Internal gears and splines in volume, blind or stepped internal gears a broach cannot reach, and external gears close to shoulders. Workpieces up to 320 mm and module 4 on the E-skive 250/320, or 500 mm and module 6 on the E-skive 500.
Who makes the cutters?
Capital Tool Industries manufactures power skiving cutters in PM-HSS with matched coatings. CTI-USA specifies them from your prints and supplies them with the machine.
Who supports the machine in North America?
CTI-USA in Hudson, Ohio: application review, quotation, installation and training coordination, spare parts and escalation to Eifco engineering. Call 330-962-8160.
Related pages and guides
Send us your part list and we will recommend a machine.
We quote the Eifco model, the CTI tooling for your first parts and the support plan together, and arrange a demonstration.