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
Barnaul manufactured heavy knuckle joint presses at its plant in Barnaul, Altai Krai, western Siberia. The KB8336, K8340 and KB8342 series covers 400 to 1600 tons of nominal force and found wide application in hot die forging 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 makes them efficient for hot die forging, where maximum force is needed only at die closure, and draws less energy per stroke than an equivalent-tonnage crank press.
The K-series (K8336, K8340, K8342) and KB-series designations refer to the same underlying press families; the prefix difference reflects production batch or minor design revision rather than a fundamental change in the machine. K8340 and KB8340 are frequently listed interchangeably in the market. Key specifications to verify during inspection: nominal force (ton), stroke (mm), 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. As those plants modernise or close, well-maintained machines become available. TRIGA inspects each unit at the source location, documents condition, and handles dismantling, loading and export.
Model Series
| Model | Nominal Force | Type | Application | Availability |
|---|---|---|---|---|
| KB8336 | 400 t | Knuckle joint press | Small forgings, calibration, coining | ● Available |
| K8340 / KB8340 | 1000 t | Knuckle joint press | Medium automotive and agricultural forgings | ● Available |
| KB8342 | 1600 t | Knuckle joint press | Heavy die forgings, railway 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 — 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
The two designations refer to the same press series. 'KB' indicates a later production batch or minor engineering revision; the fundamental design, nominal force (1000 ton) and dimensions are identical. Both designations are used interchangeably in the used equipment market.
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.
Primarily hot die forging of medium to large cross-section parts: automotive components (crankshafts, connecting rods, steering knuckles), agricultural machine parts, railway components and hand tools. The sharp force characteristic near BDC also makes them suitable for calibration and coining of forgings.
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 — Europe, Asia, India, 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
Looking for a specific machine?
Send us your specifications and we will advise on availability, inspection options and delivery.
Email
info@trigapl.com
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+39 331 780 4001
WhatsApp
+48 570 337 352
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