You Ji YH21
Image: image.youji.com, You Ji
Key Specifications
Max Spindle
Spindle Power
chuck size
max swing diameter
max turning diameter
bar capacity
How much does the You Ji YH21 cost?
Price estimate
We do not have a price for the You Ji YH21 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
An 8 in (203 mm) chuck, an A2-6 spindle nose and Ø52 mm (2.0 in) of bar capacity put the You Ji YH21 in the most common size class of CNC horizontal turning lathes. Maximum turning diameter is Ø416 mm (16.4 in) under a Ø560 mm (22.0 in) swing.
The spindle is fast for the class: 1-4,000 rpm, the same top speed as the much smaller YH15, on a 9/11 kW (12.1/14.8 hp) motor. That is a light motor for a Ø416 mm (16.4 in) turning diameter. The machine is at its best on bar and small chuck work in steel and on larger diameters in aluminium, and less suited to deep roughing of big forgings; the YH28 with 18.5/22 kW (24.8/29.5 hp) covers that.
The turret has ten stations (listed as 10-st.). This is also the first YH model for which the maker lists a C-axis function, so cross drilling and simple milling can be added to the turning cycle if the machine is ordered that way. The catalogue table does not give live tool speed or power.
A note on length. The catalogue and the maker's website print different maximum turning lengths for the YH21, so that row is left out of the table here; ask You Ji for the current figure. The machine itself is 3,525 mm (138.8 in) long, 1,680 mm (66.1 in) wide and 1,800 mm (70.9 in) high.
Full Specifications
| Parameter | Value |
|---|---|
| Chuck Size | 8 in (203 mm) |
| Max Swing Diameter | Ø560 mm (22.0 in) |
| Max Turning Diameter | Ø416 mm (16.4 in) |
| Bar Capacity | Ø52 mm (2.0 in) |
| Spindle Motor Power | 9/11 kW (12.1/14.8 hp) |
| Turret Type | 10-st. |
| Spindle Nose | A2-6 |
| Max Spindle Speed | 1-4,000 rpm |
| Machine Length | 3,525 mm (138.8 in) |
| Machine Width | 1,680 mm (66.1 in) |
| Machine Height | 1,800 mm (70.9 in) |
Specifications sourced from image.youji.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 1-4,000 rpm spindle on an A2-6 nose with Ø52 mm (2.0 in) bar capacity
- Ø416 mm (16.4 in) turning diameter within a Ø560 mm (22.0 in) swing
- 10-st. turret, and the first YH size listed with a C-axis function
- Compact: 3,525 mm (138.8 in) long and 1,680 mm (66.1 in) wide
Limitations
- 9/11 kW (12.1/14.8 hp) motor is light for the turning diameter
- The maker's two published turning lengths disagree, so the figure must be confirmed
- No live tool speed or power is printed for the C-axis version
Best For
Frequently Asked Questions
01
Ø52 mm (2.0 in), through an A2-6 spindle nose. The chuck size is 8 in (203 mm) and the spindle speed range 1-4,000 rpm.
02
Maximum turning diameter is Ø416 mm (16.4 in) and maximum swing Ø560 mm (22.0 in). The maximum turning length is not shown on this page because the maker's catalogue and website give different values.
03
Yes. The YH key reads C: C-axis function (YH21 and upward). The standard turret is listed as 10-st. The catalogue gives no driven-tool figures, so request them with the quotation.
04
The YH28 has a 10 in (254 mm) chuck, Ø74 mm (2.9 in) bar capacity, an A2-8 nose and an 18.5/22 kW (24.8/29.5 hp) motor at 1-3,000 rpm. The YH21 is faster at 1-4,000 rpm but has a 9/11 kW (12.1/14.8 hp) motor and Ø52 mm (2.0 in) bar capacity.
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