Heavy Duty Slant Bed CNC Lathe for Large Diameter Parts TCK4550–TCK4563

The TCK45 series combines heavy-duty slant bed rigidity, a 10-inch hydraulic chuck, and a Φ87mm spindle bore for large-diameter shaft, flange, and cylinder machining.

Heavy Duty Slant Bed CNC Lathe Key Features

Guideway width and Z-axis screw diameter scale with machining length. Matching a model to the job depends on part length and diameter, not just price.

• The Φ87mm spindle bore passes bar stock up to Φ72mm through the headstock, removing the need for secondary loading steps on long shaft and pipe-connector work.
• The TCK4558 and TCK4563 step up to a Φ50mm Z-axis screw and 55mm linear guideway (up from Φ40mm and 45mm on the TCK4550), improving structural stability across the full 1000mm machining length.
• The 10-inch hollow hydraulic chuck grips large-diameter forgings securely while clearing the tool turret, providing secure workholding for large-diameter parts within the machine’s machining envelope.
• The series is rated with 0.008mm positioning accuracy and 0.005mm repeat accuracy per ISO 13041-1:2020, supporting dimensional consistency across long production runs on flange and shaft work.

Heavy Duty CNC Lathe with C-Axis Turn-Mill Capability

With optional C-axis control and live tooling, the TCK45 series can perform turning, drilling, and milling operations in a single setup.

Optional Configurations

Optional turn-mill upgrades add C-axis milling, drilling, and automation capabilities beyond standard single-operation turning.

• A 12-station power turret with C-axis function adds indexed milling and drilling to the turning cycle, allowing flange faces and cross-holes to be finished in the same setup as the outside diameter.
• Face and radial power heads allow the turret to drive rotating tools directly against the part, supporting keyway milling and flat-forming on shaft sections without a separate machine.
• A Y-axis power turret may be available for selected configurations, subject to machine configuration, adding off-center milling capability for parts with eccentric features that a standard X/Z turret cannot reach.
• A bar feeder pairs with the Φ72mm through-bore capacity to feed batch runs of shaft or bushing blanks without operator reloading.
• An optional tool probe automates in-process measurement, reducing the manual gauging time required for repeat flange or shaft batches.
• A part catcher automates unloading for unattended runs, while a cabinet air conditioner keeps servo drives within rated temperatures in hot shop environments.
• An oil skimmer and oil mist filter extend coolant life and improve air quality around the machine during long production runs.

Engineering Insights

This series targets large-diameter or turn-mill work. Parts under Φ300mm requiring fast, high-cycle turning fit the standard TCK50 series slant bed lathe better, as that frame is built for quicker indexing rather than heavy-section rigidity.

Note: The TCK4550 is optimized for short parts (up to 580mm length) with Φ32/Φ40mm screws. For machining lengths exceeding 600mm, the TCK4558 or TCK4563 is strongly recommended, as they upgrade to 55mm guideways and a Φ50mm Z-axis screw to help reduce deflection during heavy cutting on long shafts.

Machining large hydraulic cylinder barrels or guide columns can cause saddle deflection under heavy interrupted cuts on a standard-guideway lathe. The 55mm guideway and Φ50mm Z-axis screw on this heavy duty slant bed CNC lathe for large diameter parts are sized to solve this constraint. Alternatively, shops facing flanged gear shafts that need drilling, keyway milling, or face work in one setup can avoid repeat-setup errors by using the optional 12-station power turret with C-axis and power heads, keeping turning and milling in one fixture.

For workpieces requiring more than the N series’ Φ650mm swing capacity, our Flat Bed CNC Lathe series extends the range to Φ1000mm. X/Z positioning on this N series maintains 0.008mm accuracy and 0.005mm repeat accuracy per ISO 13041-1:2020 test methods.

Engineer’s note: confirm the required power head and C-axis combination before ordering, as face milling and radial drilling use different power head orientations that are not interchangeable after installation.

Why Choose the N Series (TCK45xx) Over M or O Series?

Selecting the right lathe depends on your specific workpiece demands. This comparison highlights why the N Series is a specialized solution for large-diameter, heavy-duty turning compared to standard slant bed or ultra-heavy flat bed alternatives.

Comparison Criteria	M Series (TCK50xx) Standard Slant Bed	N Series (TCK45xx) Heavy-Duty Slant Bed	O Series (CK Series) Ultra-Heavy Flat Bed
Core Application Focus	High-efficiency batch production of medium-sized parts	High-rigidity heavy cutting of large-diameter, medium-length shafts	Rough/finish machining of extra-large, extra-heavy, and ultra-long workpieces
Max. Machining Diameter	Φ500 mm	Φ480 – Φ630 mm	Φ500 – Φ1000 mm
Spindle Through-Hole	Φ66 mm	Φ87 mm (passes Φ72mm bar)	Φ82 – Φ130 mm
Guideway & Ballscrew	45mm guideway / Z-axis Φ40mm screw	55mm guideway / Z-axis Φ50mm screw (improved vibration damping under heavy cutting loads)	400-755mm box ways / Φ40-Φ80mm Z-axis screws
Typical Applications	Automotive drive shafts, small-to-medium hydraulic rods	Large-diameter hydraulic cylinders, complex flange shafts, thick-wall pipes	Oil drill pipes, extra-long mill rolls, marine main shafts
Bed Structure	Slant bed (excellent chip evacuation, good dynamic rigidity)	Heavy-duty slant bed (optimized for heavy cutting thrust and large diameters)	Flat bed (optimized for ultra-heavy load capacity and stability)

Technical Specifications

The table below compares swing diameter, spindle bore, screw sizing, and travel across all three models in this series.

Parameter	Unit	TCK4550	TCK4558	TCK4563
Max. swing over bed	mm	Φ500	Φ580	Φ650
Max. machining diameter	mm	Φ480	Φ560	Φ630
Max. machining dia. on tool holder	mm	Φ320	Φ360	Φ400
Max. processing length	mm	580	1000	1000
Spindle nose	–	A2-8	A2-8	A2-8
Chuck size	inch	10″	10″	10″
Spindle motor power	kW	11 / 15 (continuous/peak)	11 / 15 (continuous/peak)	11 / 15 (continuous/peak)
Max. spindle speed	rpm	2600	2600	2600
Spindle bore	mm	Φ87	Φ87	Φ87
Max. bar through hole diameter	mm	Φ72	Φ72	Φ72
X/Z axis leadscrew	mm	Φ32 / Φ40	Φ40 / Φ50	Φ40 / Φ50
X/Z axis linear guideway	mm	45 / 45	55 / 55	55 / 55
X axis travel	mm	250	350	350
Z axis travel	mm	620	1120	1120
X/Z axis accuracy	mm	0.008	0.008	0.008
X/Z axis repeat accuracy	mm	0.005	0.005	0.005
Tailstock quill diameter	mm	Φ100	Φ100	Φ100
Tailstock quill travel	mm	120	120	120
Tailstock travel	mm	670	1250	1250
Tailstock taper	–	MT5	MT5	MT5
Machine dimension (LxWxH)	mm	4800 x 1500 x 1700	5500 x 1600 x 1950	5500 x 1600 x 1950
Weight	kg	4300	5600	5800

Standard Configuration

Standard equipment on this heavy duty slant bed CNC lathe includes control, drive, turret, and tailstock hardware shared across all three models.

• FANUC 0i-TF Plus control system
• X/Z axis FANUC servo drive motors and drivers
• Taiwan-brand hollow hydraulic 3-jaw chuck (10-inch)
• Taiwan-brand precision ballscrews (X/Z axis)
• Taiwan-brand X/Z axis precision linear guideways
• 12-station servo hydraulic turret
• Hydraulic tailstock (MT5 taper)
• Chain-type chip conveyor
• Cutting coolant system
• Central auto-lubricating system
• Fully enclosed guard
• Manual pulse generator (MPG)
• Work lamp and three-color warning light
• Cabinet heat exchanger
• Schneider electrical components
• Leveling bolts and blocks
• Standard tools and tool box

Typical Application Cases

The scenarios below describe typical machining applications for this series based on its published parameters, rather than specific customer projects.

Hydraulic cylinder barrels and guide columns: heavy roughing without chatter

Large hydraulic cylinder barrels, guide columns, and drive shafts in the Φ300-600mm range at 600-1000mm length exert high cutting forces on the saddle during roughing. A mid-size slant bed lathe with a 45mm guideway tends to mark the surface with chatter under these conditions. As a slant bed CNC lathe for large diameter parts, the TCK4558/4563 pairs a 55mm guideway with a Φ50mm Z-axis screw, while the Φ100mm tailstock quill supports the far end to maintain stability through the cut.

• The 55mm guideway and Φ50mm Z-axis screw help control chatter risks on heavy roughing passes
• A Φ100mm tailstock quill supports heavy center pressure on long, heavy blanks
• The inclined bed clears heavy chip volume away from the finished surface during roughing

Flanged gear shafts: one-setup turning, drilling, and milling

Gear shafts with flange faces, cross-drilled holes, or keyway features normally require a second setup on a mill after turning, adding handling time and risking coaxiality errors between operations. Fitted with the optional 12-station power turret, C-axis, and face/radial power heads, this CNC lathe with C-axis function can complete outside-diameter turning, flange drilling, and radial milling in a single 10-inch chuck setup.

• A 12-station power turret with C-axis combines turning and milling in one fixture
• A 10-inch chuck holds large flange diameters through both turning and milling passes
• Completing operations in one setup helps minimize coaxiality errors between turned and milled features

FAQ

How does the slant bed design improve rigidity for heavy-duty turning?

The inclined bed directs cutting force downward through the base rather than sideways against the guideways, allowing the saddle to manage deflection under heavy roughing loads. It also allows chips to fall clear of the work zone by gravity, reducing the risk of chip marking on large-diameter parts during interrupted cuts.

Can slant bed lathes be equipped with C-axis and live tooling for turn-mill work?

Yes, this series can be fitted with an optional 12-station power turret, C-axis function, and face or radial power heads. This combination allows flange drilling, keyway milling, and face work to be completed in the same setup as outside-diameter turning, without moving the part to a separate mill.

What is the difference between a heavy duty slant bed and a flat bed CNC lathe?

The N series supports machining diameters up to Φ630mm, with maximum swing over bed reaching Φ650mm, offering superior chip evacuation and dynamic rigidity, often featuring advanced turn-mill capabilities. A flat bed CNC lathe is designed for extra-large, ultra-heavy workpieces (beyond Φ650mm swing) where maximum load capacity and stability are the primary concerns, typically sacrificing rapid traverse speeds for massive box-way rigidity.

What chuck and tailstock configurations are available on this model?

The standard configuration includes a 10-inch hollow hydraulic chuck with a Φ100mm tailstock quill and MT5 taper. Tailstock quill travel is 120mm across all three models, while tailstock travel scales from 670mm on the TCK4550 up to 1250mm on the TCK4558 and TCK4563 to match their longer beds.

What types of flange and housing parts suit slant bed lathes best?

Flange plates, gear shaft flanges, and housing parts with a face or cross-hole feature suit this series well, particularly when the part diameter is in the Φ300-600mm range. The Φ87mm spindle bore and 10-inch chuck combination is sized for this diameter range rather than small precision components.

GREBO Machine Tool has been specializing in CNC machine tool manufacturing since 2005 in Tengzhou, Shandong, China. With ISO9001:2008 and CE certifications, our machines are exported to more than 50 countries worldwide.