The Knuckle Joint Press in This Range: GT Series
A knuckle joint press drives its slide through a toggle linkage instead of a crank. This manufacturer's knuckle joint series is the GT, published at 150-1,500 kN, built as a high-speed precision press — strokes per minute from 100 to 1,800 across the range, and 2,000 SPM on the GT-15H.
| Series | Drive | Nominal force | SPM |
|---|---|---|---|
| GT | Knuckle joint (toggle) high-speed | 150-1,500 kN | 100-1,800 (2,000 on the GT-15H) |
Selected per-model specifications for the GT are published on the high-speed press page, alongside the other four high-speed families.
What the GT Documentation Publishes
The manufacturer's GT documentation puts a number on the die side of the design — a die regrinding interval more than 25% longer than a conventional crank press — and documents thermal compensation of the bottom dead centre position, the drift that otherwise moves tolerances as a high-speed press warms up. The documented applications are lead frames and EV motor laminations — thin precision electronic parts.
The GT Beside the High-Speed Crank Series
- The GT knuckle joint: the GT page documents bottom dead centre thermal compensation against the drift that heat brings, and its documented applications are lead frames and EV motor laminations.
- The high-speed crank series, documented per series: the GHD for small precision parts in thin material; the GS for metal buttons, eyelets, terminals, and stator and rotor plates; the GP for motor lamination — the stacked rotors and stators; and the GPH for the same lamination work in sheet thinner than 0.5 mm.
- Force check: the GT range tops out at 1,500 kN (150 tons). The catalogue also lists straight side crank and servo series; which series a given die is quoted on is confirmed per die in the quotation.
The GT sits inside the high-speed family: the overview and all five families' tables are on the high-speed press page, and the lamination branch of that family has its own page at lamination presses. The drive comparison in depth — crank, eccentric, knuckle joint, servo, hydraulic — is in the types of power presses guide.
Frequently Asked Questions
What is a knuckle joint press used for?
High-speed precision work. In this catalogue the GT series is documented for lead frames and EV motor laminations.
How fast is the GT series?
100 to 1,800 strokes per minute across the published range, and 2,000 SPM on the GT-15H — high-speed figures for a toggle press, because the GT is built as a high-speed precision series.
What force range does the knuckle joint series cover?
150 to 1,500 kN nominal force across the GT models (GT-15H to GT-150). Per-model figures are tabled on the high-speed press page.
Does the knuckle joint design really extend die life?
The manufacturer's GT page documents a die regrinding interval more than 25% longer than a conventional crank press, and separately documents thermal compensation of the bottom dead centre position.
Send an Enquiry
Tell us the machine, your material and thickness, and the part you are forming. Tonnage, configuration and price are confirmed in the written quotation.