Rated tonnage point
In codes such as JH21-110 the figure is nominal force in tonnes, available only near bottom dead centre. Ask for the tonnage curve.
No DramaBuyer guide · Metal & CNC
A mechanical stamping press gives rated tonnage only near the bottom of the stroke, so a quote that omits where, and the clutch, brake and frame behind it, prices a number, not a press.

01
In codes such as JH21-110 the figure is nominal force in tonnes, available only near bottom dead centre. Ask for the tonnage curve.
A C-frame opens slightly under load and tilts the die. An H-frame stays square and suits progressive dies.
Pneumatic friction clutch and brake, a double safety valve and a brake monitor, or less. The stop protects the operator.
A servo drive can slow the slide in the drawing zone. A flywheel press is simpler to repair.
Hydraulic overload protection saves frame and die on a double hit. Ask if shut height adjustment is motorised.
02
Send these with the enquiry. Without them, any number a factory gives you is a guess dressed as a quotation.
03
| Require this | A pass looks like |
|---|---|
| Measure the stopping time with a stop timer from the light curtain signal. | Measured time matches the value used in the safety distance calculation. |
| Run a test die continuously at your stroke rate for an hour after warm-up. | Shut height and parts repeat inside your tolerance; clutch and brake stay cool. |
| Trigger overload protection on a test block. | Slide stops and resets without damage to frame or die. |
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A hydraulic press machine, which gives full force over the whole stroke.
A CNC press brake.
06
We name the kind of source, how many and when, and never the factory. Listed prices are asking prices, not landed cost. Where we do not hold a fact we say so: that is a GAP, not an estimate.
07
Every machine we source in this area is on the Metal & CNC page. How a project runs, stage by stage, is on how it works, and what it costs is on pricing.
Straight answers
Clutch, brake and valve brands can match. Frame stiffness and service support differ.
The three tests above and the clutch, brake and safety valve nameplates against the invoice.
A Declaration of Conformity citing EN ISO 16092-2 and its conformity route: presses with manual loading are on the high-risk list.
If you import it yourself, you are: check the documents and put your name and address on it.
Contact
Send a machine, a quotation you want checked, or a question. We reply with what we would look at first.
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Not sent
Please email info@nodramachina.com directly and we will pick it up from there.