Nagel EC Series
This model was not found in Nagel's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.
Key Specifications
Spindle Power
Accuracy
bore diameter range
stroke length max
spindle speed
stroke rate
How much does the Nagel EC Series cost?
Estimated price range
Our best estimate for a cnc grinding machine in this class — not a quote from Nagel. Configuration moves it a long way.
Overview
The Nagel EC Series is a honing machine built around force-controlled expansion: the CNC sets the stone pressure through the EC system to an accuracy of ±0.5 N. It covers bores of 8 - 200 mm (0.31 - 7.87 in) with a maximum stroke length of 500 mm (19.7 in). Nagel does not show it in its current lineup, and the listed figures have not been confirmed against a maker page.
Controlling force instead of feed position keeps the cutting pressure steady as the stones wear, and that is the route to the listed results: ±0.002 mm on bore diameter after honing, roundness of < 0.002 mm after honing and cylindricity of < 0.003 mm over bore length. The 8 mm lower limit is where it counts most, since small bores take slender tools that bend under excess pressure.
The workholding is a floating fixture that self-aligns to the bore axis. The tool therefore follows the existing bore and improves its form and size, and does not move its position. Spindle speed is 0 - 300 RPM and stroke rate 0 - 80 strokes/min, both variable and CNC controlled, on a 7.5 kW (10 hp) spindle. Air gauging is integrated, contact gauging is optional, and surface finish runs from Ra 0.10 - 1.6 µm depending on abrasive selection.
For installation the table gives 400 VAC 3-phase 50 Hz at 32 A and a weight of 4,500 kg (9,921 lb). Coolant is a honing oil flush with petroleum-based honing fluid, so plan for oil handling and mist extraction. The control is a Nagel CNC on Siemens hardware with Nagel honing software.
Full Specifications
| Parameter | Value |
|---|---|
| Bore Diameter Range | 8 - 200 mm (0.31 - 7.87 in) |
| Stroke Length Max | 500 mm (19.7 in) |
| Spindle Speed | 0 - 300 RPM (variable, CNC controlled) |
| Stroke Rate | 0 - 80 strokes/min (variable, CNC controlled) |
| Expansion Control | CNC force-controlled (EC system) — ±0.5 N accuracy |
| Positioning Accuracy | ±0.002 mm bore diameter after honing |
| Roundness Achievable | < 0.002 mm after honing |
| Cylindricity Achievable | < 0.003 mm over bore length |
| Surface Finish | Ra 0.10 - 1.6 µm (depending on abrasive selection) |
| In Process Gauging | Integrated air gauging (optional contact gauging) |
| Spindle Motor Power | 7.5 kW (10 hp) |
| Coolant System | Honing oil flush (petroleum-based honing fluid) |
| Machine Weight | 4,500 kg (9,921 lb) |
| CNC Control | Nagel CNC (Siemens hardware, Nagel honing software) |
| Workholding | Floating fixture (self-aligning to bore axis) |
| Electrical | 400 VAC 3-phase 50 Hz, 32 A |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- CNC force-controlled expansion (EC system) with ±0.5 N accuracy
- Bore range starts at 8 mm (0.31 in) and runs to 200 mm (7.87 in)
- Listed ±0.002 mm on bore diameter and roundness of < 0.002 mm after honing
- Integrated air gauging, with contact gauging as an option
- Floating fixture that self-aligns to the bore axis
Limitations
- Maximum stroke length is 500 mm (19.7 in), which rules out long bores
- Contact gauging is optional; the integrated gauging is air
- Runs on petroleum-based honing fluid, which needs its own filtration and extraction
- The electrical row is 400 VAC 3-phase 50 Hz, so other supplies need a transformer or a different build
Best For
Frequently Asked Questions
01
The expansion control row reads CNC force-controlled (EC system) with ±0.5 N accuracy. The control regulates how hard the stones press on the bore wall instead of only how far they are fed out, which keeps cutting pressure consistent from part to part.
02
Bore diameters of 8 - 200 mm (0.31 - 7.87 in), with a maximum stroke length of 500 mm (19.7 in). The table does not give a separate maximum bore length or a workpiece weight.
03
±0.002 mm on bore diameter after honing, roundness of < 0.002 mm after honing and cylindricity of < 0.003 mm over bore length. Surface finish is Ra 0.10 - 1.6 µm depending on abrasive selection. All are unconfirmed listed figures.
04
Integrated air gauging is listed as the in-process method, with contact gauging as an option. The part sits in a floating fixture that self-aligns to the bore axis.
05
The electrical row lists 400 VAC 3-phase 50 Hz at 32 A. The spindle is rated 7.5 kW (10 hp) and the machine weighs 4,500 kg (9,921 lb). It uses a honing oil flush with petroleum-based honing fluid.
Community Discussions
Options and configuration advice
Links to community discussions. Summaries are editorial — visit the original thread for full context.
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