CN-FD91S Heavy Duty CNC Turning and Milling Lathe for Shaft and Disc Parts
The CN-FD91S heavy duty CNC lathe machine is designed for manufacturers that need stronger cutting rigidity, higher machining flexibility, and more stable performance when processing shaft-type and disc-type metal parts. With a maximum swing diameter of 750mm over the lathe, a maximum shaft-type processing diameter of 520mm, and a maximum disc diameter of 380mm, this machine is suitable for demanding industrial turning applications where ordinary CNC lathes may not provide enough rigidity or process capacity.
For many B2B machining projects, parts are no longer limited to simple external turning. A single workpiece may require turning, drilling, milling, boring, end-face machining, side-feature machining, and tailstock support. If these operations are completed on multiple machines, production time increases, clamping accuracy becomes harder to control, and delivery stability may be affected.
The CN-FD91S solves this problem by combining heavy-duty turning capacity with a CNC turning and milling lathe structure. It uses a Y-axis power turret and tailstock layout, helping improve machining flexibility for shaft parts, disc parts, and components with compound processing requirements.
As a Y axis CNC lathe, the CN-FD91S is especially suitable for high-hardness materials, heavy cutting allowance, heavier workpieces, and parts requiring both cutting efficiency and dimensional stability. Its 12-station power turret, A2-11 spindle nose, Ø105mm spindle through-hole, integrated 45° casting bed, and 55/45 heavy-duty roller guide rails provide a strong foundation for industrial production.
Key Features
Large-Torque Output for Heavy Cutting
The CN-FD91S adopts a main transmission structure focused on large torque output. This makes the machine suitable for hard cutting, heavy cutting, and machining of workpieces with larger cutting allowance.
For manufacturers processing forged parts, heavy shafts, flanges, sleeves, discs, or high-hardness materials, torque stability is essential. A strong transmission system helps reduce cutting interruption and supports more reliable material removal.
A2-11 Spindle Nose and Ø105mm Spindle Through-Hole
The machine uses an A2-11 spindle nose end type and a Ø105mm spindle through-hole. When equipped with a hollow chuck plate, the maximum bar diameter can reach Ø90mm.
This configuration makes the CN-FD91S suitable for large shaft parts, pipe-type parts, sleeve components, and heavy-duty bar machining applications.
Independent Spindle and Automatic Gear Change Options
The CN-FD91S is available with two spindle configuration directions:
- Independent spindle version: infinite variable speed 23–2000r/min
- Automatic gear change version: automatic three-gear spindle structure with low, medium, and high speed ranges listed in the document
This allows buyers to choose the spindle configuration based on their production habits, material types, cutting load, and preferred speed control method.
Y-Axis Power Turret for Compound Machining
The CN-FD91S adopts a Y-axis power knife tower + tailstock structure, greatly improving machining flexibility for shaft parts. The power shaft output can be selected up to 7.5kW, supporting stronger milling and drilling capability.
For parts requiring side holes, face holes, slots, keyway-like features, or compound machining, this Y axis CNC lathe provides more process options than a standard turning lathe.
12-Station Power Turret
The machine uses a 12-station power turret. This gives operators more tool arrangement flexibility for external turning, boring, drilling, milling, grooving, threading, and powered-tool operations.
For high-mix B2B production, more turret stations help reduce tool change limitations and support complex part programs.
45° Integrated Casting Bed
The bed body uses an integrated casting 45° structure. This helps improve machine rigidity, chip evacuation, operator access, and machining stability.
The machine base is also optimized by finite element analysis, improving rigidity for heavy-duty cutting applications.
Heavy-Duty Roller Guide Rails
The X/Z axes adopt 55/45 heavy-duty roller guide rails. The document emphasizes strong rigidity, making the machine suitable for heavier cutting conditions.
For a heavy duty CNC lathe machine, guide rail rigidity directly affects vibration control, surface finish, and dimensional consistency during heavy cutting.
Pre-Stretched X/Z Axis Structure
The X and Z axes use a pre-stretched structure. This helps reduce the influence of thermal deformation on machining accuracy and improves axis rigidity.
For long production cycles, thermal stability is important because temperature changes can gradually affect positioning accuracy and part consistency.
Benefits for B2B Manufacturing Buyers
Suitable for High-Hardness and Heavy Workpieces
The CN-FD91S is especially suitable for processing materials with high hardness, large machining allowance, heavy weight, and compound process requirements. This makes it valuable for heavy machinery parts, hydraulic components, automotive parts, industrial shafts, and large disc components.
Better Process Integration
With a Y-axis power turret and turning-milling capability, this CNC turning and milling lathe can complete more processes in one setup. This helps reduce secondary machining, shorten production flow, and improve workpiece consistency.
For B2B manufacturers, fewer setups usually mean lower labor dependency, better repeatability, and more stable delivery.
Higher Machining Accuracy
The document lists working accuracy of IT5–IT6, processing roughness of ≤Ra1.25μm, X/Z repeat accuracy of ±0.0025mm / ±0.005mm, and X/Z positioning accuracy of ±0.005mm / ±0.009mm.
These specifications make the CN-FD91S suitable for customers that require both heavy cutting capacity and precision machining stability.
Stronger Shaft and Disc Machining Flexibility
The maximum shaft-type processing diameter reaches 520mm, while the maximum disc diameter reaches 380mm. The machine supports different machining lengths depending on tool and clamping conditions, making it suitable for both shaft-type and disc-type industrial parts.
Practical for Heavy-Duty Production Lines
With a 5000kg machine weight, 45° integrated casting bed, A2-11 spindle nose, and heavy-duty roller guide rails, the CN-FD91S is built for industrial production environments that require stable long-term operation.
Technical Specifications
| Item | Specification |
|---|---|
| Product Model | CN-FD91S |
| Machine Type | Heavy Duty CNC Lathe Machine / CNC Turning and Milling Lathe |
| Spindle Configuration | Independent Spindle / Automatic Gear Change |
| Max. Swing Diameter Over Lathe | 750 mm |
| Man-Machine Loading and Unloading Height | 1085 mm |
| Max. Processing Diameter, Shaft Type | 520 mm |
| Max. Diameter, Disc Type | 380 mm |
| Max. Processing Workpiece Length | Claw-round knife: 750 mm |
| Max. Processing Workpiece Length | Claw-end face of boring cutter holder: 720 mm |
| Max. Processing Workpiece Length | Claw-90° power head end: 500 mm |
| Max. Bar Diameter with Hollow Chuck Plate | Ø90 mm |
| X-Axis Effective Travel | 370 mm |
| Z-Axis Effective Travel | 820 mm |
| X/Z Axis Fast Speed | 16 m/min, 20 m/min |
| X-Axis Servo Motor | 22 N·m |
| Z-Axis Servo Motor | 22 N·m |
| Spindle Nose End Type | A2-11 |
| Spindle Through-Hole Diameter | Ø105 mm |
| Independent Spindle Speed | Infinite variable speed 23–2000 r/min |
| Automatic Gear Change Speed | Automatic three-gear structure |
| Automatic Gear High Range | H: 128–2200 r/min |
| Automatic Gear Medium Range | M: 45–419 r/min |
| Automatic Gear Low Range | L: 20–191 r/min |
| Spindle Motor Power, Independent Spindle | 18.5 / 15 kW |
| Spindle Motor Power, Automatic Gear Change | 15 / 11 kW |
| Chuck Plate Specification | Hydraulic 15 inch |
| Working Accuracy | IT5–IT6 |
| Processing Roughness | ≤Ra1.25μm |
| X/Z Axis Repeat Accuracy | ±0.0025 / ±0.005 mm |
| X/Z Axis Positioning Accuracy | ±0.005 / ±0.009 mm |
| Tailstock Sleeve Specification | MT5 |
| Tailstock Sleeve Travel | 120 mm, fluid drive |
| Max. Tail Sleeve Diameter | 90 mm |
| Tailstock Moving Method | Saddle seat drive |
| Turret Form | 12-station power turret |
| External Turning Tool Size | 25 × 25 mm |
| Boring Cutter Diameter | Ø40 mm |
| Power Tool Holder | ET32, 2–20 |
| Bed Body Structure | Integrated casting 45° |
| Lubrication Form | Automatic |
| Overall Dimensions | 3736 × 1915 × 2003 mm |
| Machine Weight | 5000 kg |
Application Scenarios
Heavy Shaft Machining
The CN-FD91S is suitable for heavy shafts, drive shafts, hydraulic shafts, transmission parts, and industrial cylindrical components. Its strong spindle structure, Ø105mm spindle through-hole, and tailstock support make it suitable for larger shaft machining.
Disc and Flange Components
For disc-type parts, flanges, collars, wheel-like components, and large round parts, this heavy duty CNC lathe machine provides stable turning and boring capability.
Hydraulic and Heavy Machinery Parts
The machine is suitable for hydraulic sleeves, valve bodies, industrial connectors, equipment components, and parts that require both heavy cutting and precision finishing.
Automotive and Industrial Parts
For automotive components, mechanical shafts, hubs, bushings, sleeves, and precision machined metal parts, the CN-FD91S provides turning and milling process flexibility in one platform.
Compound Turning-Milling Parts
As a CNC turning and milling lathe, the CN-FD91S is suitable for parts requiring external turning, boring, side drilling, face machining, milling, and powered-tool processing.
Custom CNC Machining Services
For CNC job shops and B2B machining suppliers, this machine is suitable for high-mix parts, larger cutting allowance, complex drawings, and industrial workpieces requiring stronger machine rigidity.
Independent Spindle vs Automatic Gear Change
Independent Spindle Version
The independent spindle version is suitable for buyers who need wider speed flexibility and stronger spindle motor output. With infinite variable speed from 23–2000r/min and 18.5/15kW spindle motor power, it is suitable for varied cutting conditions and complex machining tasks.
Automatic Gear Change Version
The automatic gear change version is suitable for buyers who need strong gear transmission and stable torque output across low, medium, and high speed ranges. This configuration is practical for hard cutting, heavy cutting, and larger workpieces.
How to Choose
Choose the independent spindle version when your production requires wider speed adjustment and flexible part changes. Choose the automatic gear change version when your workpieces require stronger low-speed torque and more stable heavy cutting performance.
Why Choose the CN-FD91S Heavy Duty CNC Turning and Milling Lathe?
Built for Heavy Cutting
The CN-FD91S is designed for hard cutting, heavy cutting, large-margin workpieces, and heavy industrial parts.
Y-Axis Power Turret for Flexible Machining
The Y-axis power turret improves compound machining capability, helping complete turning, drilling, and milling operations in one machine platform.
High Accuracy with Strong Rigidity
With IT5–IT6 working accuracy, ≤Ra1.25μm surface roughness, and heavy-duty roller guide rails, the machine supports both precision and cutting strength.
Stable 45° Integrated Casting Bed
The integrated casting 45° bed structure improves rigidity and supports stable machining under heavy load.
Suitable for B2B Industrial Production
This Y axis CNC lathe is suitable for manufacturers producing shafts, discs, hydraulic parts, heavy machinery components, automotive parts, and custom CNC turned-milled components.
FAQ
Q1: What is the CN-FD91S mainly used for?
The CN-FD91S is mainly used for heavy shafts, disc parts, flanges, hydraulic parts, automotive components, heavy machinery parts, and workpieces requiring turning, drilling, milling, and boring.
Q2: Is the CN-FD91S a CNC turning and milling lathe?
Yes. The CN-FD91S is a CNC turning and milling lathe equipped with a Y-axis power turret and tailstock structure for compound machining.
Q3: What is the maximum swing diameter?
The maximum swing diameter over the lathe is 750mm.
Q4: What is the maximum shaft-type processing diameter?
The maximum processing diameter for shaft-type parts is 520mm.
Q5: What is the spindle through-hole diameter?
The spindle through-hole diameter is Ø105mm, and the maximum bar diameter is Ø90mm when equipped with a hollow chuck plate.
Q6: What accuracy can the CN-FD91S reach?
The machine can reach IT5–IT6 working accuracy, with processing roughness ≤Ra1.25μm.
Q7: What is the turret configuration?
The CN-FD91S uses a 12-station power turret with ET32 power tool holder support.
Q8: Which buyers is this machine suitable for?
It is suitable for B2B buyers such as heavy machinery parts manufacturers, hydraulic component suppliers, automotive parts manufacturers, shaft machining factories, industrial repair workshops, and custom CNC machining service providers.
