kN, tonnes and US tons on press brake specifications
One metric tonne of force is exactly 9.80665 kN and one US ton of force is 8.896443 kN (NIST). This catalog lists pressing force in tonnes; where a maker publishes kilonewtons, it divides by 10, which gives about 2% fewer tonnes than the exact conversion (1,000 kN is 102 tonnes-force).
The conversions
The NIST Guide to the SI gives 1 kilogram-force = 9.806 65 N exactly, so a tonne-force (1,000 kgf) is 9.806 65 kN, and 1 ton-force (2,000 lbf, the US ton) = 8.896 443 kN. One tonne-force is therefore about 1.102 US tons.
Tonnes to kN and US tons
| Rating | kN at 10 kN per tonne | Exact kN | Exact US tons |
|---|---|---|---|
| 40 t | 400 kN | 392.27 kN | 44.1 US tons |
| 63 t | 630 kN | 617.82 kN | 69.4 US tons |
| 100 t | 1,000 kN | 980.67 kN | 110.2 US tons |
| 135 t | 1,350 kN | 1,323.9 kN | 148.8 US tons |
| 160 t | 1,600 kN | 1,569.06 kN | 176.4 US tons |
| 200 t | 2,000 kN | 1,961.33 kN | 220.5 US tons |
| 250 t | 2,500 kN | 2,451.66 kN | 275.6 US tons |
| 320 t | 3,200 kN | 3,138.13 kN | 352.7 US tons |
| 400 t | 4,000 kN | 3,922.66 kN | 440.9 US tons |
| 500 t | 5,000 kN | 4,903.33 kN | 551.2 US tons |
| 630 t | 6,300 kN | 6,178.19 kN | 694.5 US tons |
| 800 t | 8,000 kN | 7,845.32 kN | 881.8 US tons |
| 1,000 t | 10,000 kN | 9,806.65 kN | 1,102.3 US tons |
kN to tonnes and US tons
| Rating | Tonnes at 10 kN per tonne | Exact tonnes | Exact US tons |
|---|---|---|---|
| 400 kN | 40 t | 40.8 t | 45 US tons |
| 630 kN | 63 t | 64.2 t | 70.8 US tons |
| 1,000 kN | 100 t | 102 t | 112.4 US tons |
| 1,600 kN | 160 t | 163.2 t | 179.8 US tons |
| 2,200 kN | 220 t | 224.3 t | 247.3 US tons |
| 3,000 kN | 300 t | 305.9 t | 337.2 US tons |
| 4,000 kN | 400 t | 407.9 t | 449.6 US tons |
In this catalog
Pressing force is shown in tonnes for all 1,274 press brakes that publish it (5–3,000 t). A maker’s kN value divided by 10 is shown as tonnes, so a 1,000 kN machine appears as 100 t. To compare with a rating in US tons, multiply the catalog figure by about 1.12 where the maker published kN, or 1.10 where it published tonnes.
How this guide was made
- Figures about machines are computed from this catalog each time the page is built, so they follow the catalog (newest reading: 28 October 2026). They cover the machines whose makers publish each figure.
- Facts from outside the catalog name their source, and makers are quoted only with sentences read on their own websites.
- The text was drafted with an AI model (Claude, from Anthropic) and checked against the catalog and the sources below by Claude (AI) on 30 October 2026.