Why slant‑bed design matters
For small to medium parts such as shafts, sleeves, pins, and small flanges, a slant‑bed CNC lathe offers clear advantages over traditional flat‑bed machines. The 45° inclined bed allows chips to fall away from the cutting zone, reducing the risk of re‑cutting and improving surface quality. Gravity also helps stabilise the moving components, increasing rigidity during heavy cuts. This is why slant‑bed designs have become the industry standard for precision turning applications.
The HAIDI Machine TCK6340 takes this concept further with a single‑piece cast iron bed that has been aged and stress‑relieved. The wider guide rail surfaces have been induction‑hardened and precision‑ground to provide a stable platform for high‑speed machining.
45° integrated bed and Taiwanese linear guideways
The TCK6340 features a 45° overall inclined bed structure – a design that combines high rigidity with efficient chip flow. The bed is cast as a single piece from high‑strength material, eliminating the alignment issues that can occur with bolted or fabricated structures.
The X and Z axes are equipped with pre‑loaded Taiwanese linear rolling guideways. These offer several practical benefits over box or sliding guides: no stick‑slip even at very low feed rates, higher positional accuracy, reduced friction, and longer service life with minimal maintenance. For shops that run high‑volume production, this translates directly into consistent part quality and less downtime.
Spindle and drive system
The TCK6340 is powered by a 5.5 kW AC spindle motor (optional 11 kW for heavier applications), providing a speed range from 0 to 3,500–4,000 r/min. The spindle unit is assembled in a temperature‑controlled environment, run in for 72 hours, and then test‑run for another 72 hours after installation – a process that ensures high‑speed performance and long‑term reliability.
The spindle nose is A2‑5 with a through‑bore of 56 mm, giving a bar capacity of approximately 45 mm. An optional 6‑inch hydraulic chuck or collet chuck can be fitted depending on the workpiece type and production volume.
For applications requiring higher torque at lower speeds, the optional 11 kW spindle motor provides additional cutting power for tougher materials like stainless steel or alloy steel.
Accuracy and real‑world performance
The TCK6340 delivers positioning accuracy of 0.016 mm on both X and Z axes, with repeatability of ±0.003 mm. In practical terms, this means that when machining a batch of 1,000 shafts or pins, the diameter variation from the first part to the last part will be well within common tolerance bands (typically IT6–IT7 grade).
Surface finishes down to Ra 1.6 µm are achievable with appropriate tooling and cutting parameters – sufficient for most automotive and general engineering components without requiring secondary finishing operations.
Guide screws and feed drives
Both X and Z axes use precision ground ball screws with a pre‑tensioned, double‑end fixed support structure. This design eliminates transmission backlash and compensates for thermal expansion that would otherwise affect positioning accuracy during long production runs.
The ball screws are directly coupled to AC servo motors via low‑inertia, high‑torque elastomeric couplings. The X‑axis motor includes an automatic brake to prevent the axis from dropping when power is off. Rapid traverse rates are 15–18 m/min on X and 15–20 m/min on Z, with cutting feed rates infinitely variable from 1 to 15,000 mm/min.
Tooling configuration
The TCK6340 is supplied with a gang tool post arrangement as standard. Gang tooling offers the fastest possible tool change times – typically under one second – because there is no turret indexing time. This makes the machine particularly well‑suited for high‑volume production of simple to medium‑complexity parts where cycle time reduction is critical.
Maximum tool shank size is 20×20 mm, and the standard configuration includes four tool stations. For applications requiring more tools or automated tool indexing, an optional 6‑station or 8‑station electric turret can be specified.
Practical features for daily operation
Automatic lubrication: Centralised, timed, and metered lubricant delivery to all guideways and ball screws ensures that critical moving surfaces are always properly lubricated. The system operates automatically, requiring only periodic refilling of the lubricant reservoir.
Chip management: The 45° bed slope directs chips directly into a chip tray or optional chip conveyor. Users can choose between side discharge and rear discharge configurations depending on workshop layout. The optional chip conveyor automates chip removal, reducing manual cleaning time.
Full enclosure: The machine is equipped with a fully enclosed splash guard with safety glass windows. This contains coolant mist and flying chips while providing excellent visibility of the cutting area. The design is ergonomic and easy to clean.
Coolant system: A 90‑litre coolant tank with a high‑flow pump provides external coolant to the cutting zone. Filtered coolant recirculates through the system, maintaining consistent cutting conditions.
Optional configurations
To adapt to specific production needs, the TCK6340 can be equipped with:
11 kW spindle motor for heavy‑duty cutting
6‑inch or 8‑inch hydraulic chuck
6‑station or 8‑station electric turret
Chip conveyor (side or rear discharge)
High‑pressure coolant system (through‑tool option)
Automatic bar feeder interface
Tailstock for longer workpiece support (on extended bed versions)
Siemens, Fanuc, GSK, or SYNTEC CNC controls
What makes the TCK6340 cost‑effective
The TCK6340 is priced significantly below comparable European or Japanese slant‑bed lathes, yet its specification – 45° integrated cast iron bed, Taiwanese linear guideways, precision ground ball screws, and 5.5 kW AC spindle – matches or exceeds many mid‑range offerings. By using proven, mature technology and well‑established supply chains, HAIDI Machine delivers a machine that small to medium job shops can afford and rely on for daily production of precision turned parts.
Who is the TCK6340 for?
This machine is a good fit for:
Shops producing shafts, pins, sleeves, and small flanges in batches
Automotive parts suppliers requiring high‑volume, consistent quality
Electronics and aerospace component manufacturers needing tight tolerances
General engineering workshops upgrading from manual or flat‑bed lathes
Factories with limited floor space (compact footprint of approximately 2.3×1.5 metres)
➡️ For complete specifications, optional configurations, or a budget quotation, click here to contact the HAIDI Machine sales engineering team.