1000 ton Knuckle Joint Press Barnaul K8340 #434
TypeKnuckle Joint Press
Nominal force1000 ton
LocationEurope
StatusHot offer
Soviet-Built Forging Equipment · Barnaul, Russia
Used Barnaul Knuckle Joint Presses
The Barnaul plant manufactured heavy knuckle joint presses in Altai Krai, southwestern Siberia. The KB8336, K8340 and KB8342 model range covers 400 to 1600 tons of nominal force and was used for cold forging, coining and sizing (calibration) of automotive, agricultural and railway components across the Soviet bloc and Eastern Europe. TRIGA sources these machines directly from Polish and Central European forging plants, with full documentation, on-site inspection and worldwide export logistics.
400 ton Knuckle Joint Coining Press Barnaul KB8336
TypeKnuckle Joint Press
Nominal force400 ton
LocationEurope
StatusAvailable
1600 ton Knuckle Joint Press Barnaul K8342
TypeKnuckle Joint Press
Nominal force1600 ton
LocationEurope
StatusSold
Knuckle Joint Press BARNAUL KB8336 – 400 tons
TypeKnuckle Joint Press
Nominal force400 t
LocationEurope
StatusSold
About Barnaul Knuckle Joint Presses
Barnaul's press range is built around the knuckle-joint (toggle) drive mechanism. Unlike a straight crank press, the knuckle joint delivers full rated tonnage only in the final few millimetres of slide travel, typically 1–3 mm before bottom dead centre. This force characteristic suits cold forging, coining and sizing, and draws less energy per stroke than an equivalent-tonnage crank press.
In used listings and legacy documentation, Barnaul presses appear with both K and KB prefixes for the same tonnage class: K8340 / KB8340 for 1000-ton machines and K8342 / KB8342 for 1600-ton machines. Treat the prefix as a listing and documentation detail, then verify the actual machine by nominal force, stroke, shut height, table dimensions and main motor power.
Mechanically, Barnaul presses use robust cast-iron C-frame or arch-frame construction with straightforward pneumatic clutch-brake systems. The drive components (flywheel, clutch, eccentric shaft and connecting rod) are heavy-duty Soviet-spec parts available through Eastern European machine tool suppliers. A competent millwright familiar with Soviet press design can overhaul a Barnaul machine without specialist manufacturer support.
Barnaul knuckle joint presses operated in state forging enterprises throughout Poland, the Czech Republic, Hungary, Romania and the Baltic states. When those plants replace old forging lines or stop production, Barnaul presses enter the used market. TRIGA confirms condition at the source location and handles dismantling, loading and export.
Model Series
| Model | Nominal Force | Type | Application | Availability |
|---|---|---|---|---|
| KB8336 | 400 t | Knuckle joint press | Cold forging, coining and calibration for small components | ● Available |
| K8340 / KB8340 | 1000 t | Knuckle joint press | Cold forging, coining and calibration for automotive and agricultural components | ● Available |
| K8342 / KB8342 | 1600 t | Knuckle joint press | Cold forging, sizing and calibration for railway and engineering components | — Sold |
What to Check When Buying a Used Barnaul Press
Knuckle mechanism and pins
Inspect the knuckle pins and bushings for wear. Excessive play in the toggle joint causes stroke variation at bottom dead centre and reduces forging accuracy. Pin replacement is straightforward but requires the press to be stripped down.
Clutch and brake
Check friction linings, pressure springs and the pneumatic supply valve. A worn clutch increases the stopping angle, creating a safety risk on any press. Pneumatic components are standard and widely available.
Frame and tie rods
Look for cracks at the crown corners and verify tie rod nut torque. Tie rod elongation is the most common structural defect on high-tonnage Soviet presses and requires specialist repair.
Guides and gibs
Measure slide clearance. Knuckle joint presses are less sensitive to guide wear than trimming presses, but excessive clearance causes lateral force at die closure and accelerates tooling wear.
Electrical and safety systems
Original Soviet electrical panels (380 V, 50 Hz) may require adaptation for local supply standards. Verify all safety interlocks, two-hand control and overload protection are present and functional before shipment.
FAQ
Frequently Asked Questions
Both designations are used for Barnaul 1000-ton knuckle-joint presses in used equipment listings and legacy documentation. Treat K8340 / KB8340 as the same press family, then confirm the exact variant by nameplate, nominal force, stroke, table size and machine documentation.
TRIGA sells machines as found. We do not supply spare parts. Parts sourcing is the buyer's responsibility. Standard bearings and pneumatic components are available off-the-shelf; major drive components may require sourcing through specialist machine tool suppliers.
Barnaul knuckle joint presses are used for cold forging, coining and sizing (calibration) of automotive and agricultural components, railway parts and hand tools. Force concentration near bottom dead centre gives dimensional accuracy and stroke-to-stroke repeatability on precision work.
Yes. TRIGA can organise dismantling and loading at the source location. If the buyer prefers to arrange their own crew, we coordinate access and timing with the seller.
Yes. We arrange shipping to any destination, including Europe, Asia, India and the Middle East. Road transport goes with CMR documentation; for intercontinental shipments we handle Bill of Lading and export paperwork. All logistics are covered under the sale contract.
Contact Us
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