Jainnher JHD-3205IO
Image: jainnher.com, Jainnher
Key Specifications
grinding type
id grinding capacity
max grinding diameter
max grinding length
max swing
max workpiece weight
How much does the Jainnher JHD-3205IO cost?
Price estimate
We do not have a price for the Jainnher JHD-3205IO 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
The Jainnher JHD-3205IO is the external-and-internal model of the larger JHD double spindle grinder. It grinds outside diameters up to 320 mm (12.5 in) over a length of 200 mm (7.9 in), and bores from Ø 6 to Ø 200 up to 150 mm deep, without taking the part out of the 8 in chuck.
Compared with the JHD-1503IO the whole machine is a size up. Swing is 500 mm (20 in), job weight 130 kg (287 lb), and each axis has 500 mm of stroke with the same 10 m/min (32.8 ft/min) rapid. The work head is driven by a FANUC aiF 22, 3.5 kW motor and can be swung +15° to -15° by hand for tapers.
On the Y axis the O.D. wheel is 205 x 25 mm (8.1 x 1.0 in) at 3,100 rpm. That is a small, fast wheel, suited to short diameters and shoulders close to the chuck. The JHD-3205IU is the alternative when the outside diameter is the main job. Both wheel spindles have 3.75 kW (5 HP) motors.
What sets the JHD-3205 line apart is how far the axis count can be taken. As standard, X, Y and Z are servo axes with two moving together. Jainnher lists options for three, four or five simultaneous axes by adding a C axis and a B axis, and describes the B axis as a rotary table for heavy grinding and continuous work. It is offered for this series only. Net weight is 5,100 kg (11,243 lb).
Full Specifications
| Parameter | Value |
|---|---|
| Grinding Type | External & Internal |
| ID Grinding Capacity | Ø 6-Ø 200 (0.25"-8") x 150 mm |
| Max Grinding Diameter | 320 mm (12.5 in) |
| Max Grinding Length | 200 mm (7.9 in) |
| Max Swing | 500 mm (20 in) |
| Max Workpiece Weight | 130 kg (287 lb) |
| Wheel Head Type | OD, ID |
| Chuck Size | 8 in |
| Work Spindle Speed | 20-1000 rpm/min (variable speed) |
| X Axis Travel | 500 mm (19.6 in) |
| Work Head Swing Angle | +15° ~ -15° (Manual) |
| X Axis Rapid Traverse | 10 m/min (32.8 ft/min) |
| X Axis Min Setting Unit | 0.001 mm (0.00004 in) |
| OD Wheel Size | 205 x 25 mm (8.1 x 1.0 in) |
| OD Wheel Speed | 3,100 rpm |
| Y Axis Travel | 500 mm (19.6 in) |
| Y Axis Rapid Traverse | 10 m/min (32.8 ft/min) |
| Y Axis Min Setting Unit | 0.001 mm (0.00004 in) |
| Z Axis Travel | 500 mm (20 in) |
| Z Axis Rapid Traverse | 10 m/min (32.8 ft/min) |
| Z Axis Min Setting Unit | 0.001 mm (0.00004 in) |
| X Axis Motor | FANUC β12, 1.8 kW |
| Work Head Motor | FANUC aiF 22, 3.5 kW |
| Y Axis Motor | FANUC β12, 1.8 kW |
| Y Axis Spindle Motor | 3.75 kW (5 HP), 2P |
| Z Axis Motor | FANUC β12, 1.8 kW |
| Z Axis Spindle Motor | 3.75 kW (5 HP), 2P |
| Machine Weight | 5,100 kg (11,243 lb) |
| Gross Weight | 5,500 kg (12,125 lb) |
| Machine Dimensions | 3,100 x 2,150 x 2,270 mm (122.0 x 84.6 x 89.4 in) (L x W x H) |
Specifications sourced from jainnher.com — verified 2026-10-05
Strengths & Limitations
Strengths
- O.D. up to 320 mm (12.5 in) and bores from Ø 6 to Ø 200 ground in one chucking
- 500 mm (19.6 in) of X and Y stroke with a 0.001 mm (0.00004 in) setting unit
- Optional B and C axes, for up to 5 axes moving simultaneously
- Work head with a FANUC aiF 22, 3.5 kW motor and manual swing of +15° to -15°
- Roller linear guideways with forced lubrication on all three axes
Limitations
- O.D. grinding length is 200 mm (7.9 in), so it is a chucking machine, not a shaft grinder
- The O.D. wheel is only 205 x 25 mm (8.1 x 1.0 in); the JHD-3205IU carries 405 x 50 mm (15.9 x 2.0 in)
- Work head swing is manual unless the B axis option is ordered
- I.D. wheel size and speed are not published and depend on the spindle selected
Best For
Frequently Asked Questions
01
An outside diameter up to 320 mm (12.5 in) over a length of up to 200 mm (7.9 in), and a bore from Ø 6 to Ø 200 up to 150 mm deep. The wheel head type is OD, ID: one external and one internal wheel on separate slides.
02
In the external wheel. The JHD-3205IO has a 205 x 25 mm (8.1 x 1.0 in) O.D. wheel at 3,100 rpm and a grinding length of 200 mm (7.9 in). The JHD-3205IU has a 405 x 50 mm (15.9 x 2.0 in) wheel at 1,780 rpm and a grinding length of 100 mm (3.9 in).
03
Not as standard. The work head swings +15° to -15° manually. Jainnher offers an automatic rotating B axis as an option and says it is for the JHD-3205 series only, describing it as a rotary table suitable for heavy grinding and continuous processing.
04
The machine measures 3,100 x 2,150 x 2,270 mm (122.0 x 84.6 x 89.4 in), length by width by height. Net weight is 5,100 kg (11,243 lb) and gross weight 5,500 kg (12,125 lb).
