Onsrud 420G 5-Axis
Key Specifications
Max Spindle
Tool Capacity
Spindle Power
table size x
table size y
machine length
How much does the Onsrud 420G 5-Axis cost?
Price estimate
We do not have a price for the Onsrud 420G 5-Axis 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
At 428 in (10,872 mm) of table X, the Onsrud 420G 5-Axis is the longest five-foot-wide machine in Onsrud's G-Series 5-Axis table. Table Y is 61 in (1,550 mm), and the model is listed with 16 in (406 mm) and 18 in (457 mm) Z-strokes.
Very long, narrow, shallow: the envelope describes the parts. Wing and fuselage stringers, mast and spar sections, long extrusions, rail and bus panels. For these the alternative to a long 5-axis bed is moving the part between setups, and each move costs alignment. Here the part is clamped once along its full length.
Nine vacuum zones are standard. Onsrud's upgrade list for the series includes a dual gantry and a second tool changer, and the page mentions adding a second 12-position rotary ATC. With thirty-five feet between the ends of the table, a tool changer at each end saves real time.
The frame is 527 in (13,386 mm) long and 103 in (2,617 mm) high with the 16 in stroke, 523 in (13,285 mm) and 140 in (3,556 mm) with the 18 in stroke, and 136 in (3,455 mm) wide. Onsrud recommends laser compensation and linear scales where tolerances are tight. On a part as long as this table, thermal growth and axis straightness matter, so take that recommendation seriously.
Full Specifications
| Parameter | Value |
|---|---|
| Table Size X | 428 in (10,872 mm) |
| Table Size Y | 61 in (1,550 mm) |
| Machine Length | 527 in (13,386 mm) with 16 in Z; 523 in (13,285 mm) with 18 in Z |
| Machine Width | 136 in (3,455 mm) |
| Machine Height | 103 in (2,617 mm) with 16 in Z; 140 in (3,556 mm) with 18 in Z |
| Vacuum Zones Standard | 9 |
| Spindle Motor Power | 18 hp (13.4 kW) |
| Max Spindle Speed | 24,000 rpm |
| Tool Capacity | 12 (larger capacity tool changers optional) |
| Z Stroke | 16 in (406 mm); 18 in (457 mm) |
| Spindle Power Optional | 33 hp (24.6 kW) |
| Dual Gantry | Optional |
| Second Tool Changer | Optional |
Specifications sourced from cronsrud.com — verified 2026-10-05
Strengths & Limitations
Strengths
- Longest five-foot-wide 5-axis table in the series: 428 in (10,872 mm)
- 9 vacuum zones as standard
- Second 12-position rotary ATC and dual gantry offered
- Frame only 136 in (3,455 mm) wide
Limitations
- Machine length of 527 in (13,386 mm)
- Z-stroke of 16 in (406 mm) or 18 in (457 mm) only
- Accuracy over this length depends on options the maker recommends but does not list as standard
Best For
Frequently Asked Questions
01
The table is 428 in (10,872 mm) in X. A 5-axis head needs room to tilt at the ends of a part, so the longest part that can be fully machined is shorter than the table. Ask the maker for the travel figures, which its table does not give.
02
527 in (13,386 mm) long and 103 in (2,617 mm) high with the 16 in Z-stroke; 523 in (13,285 mm) long and 140 in (3,556 mm) high with the 18 in Z-stroke. Width is 136 in (3,455 mm) for both.
03
The standard capacity is 12 tools. Onsrud suggests a second 12-position rotary ATC for the series. On a 428 in (10,872 mm) table a second changer means the gantry does not have to return the full length of the bed for each tool.
04
Onsrud's page gives no accuracy figure. It does say that for applications requiring tight tolerances it recommends laser compensation and linear scales (encoders). Agree an acceptance test with the maker if accuracy over the full length matters.
