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TK6926J CNC Floor Type Boring and Milling Machine
TK6926J CNC Floor Type Boring and Milling Machine Spindle diameter: Φ260mm; Column travel (X): 4000+n*1000mm; Spindle box vertical travel (Y): 5000-7000mm; Spindle axial travel (Z): 1600mm; Ram travel (W): 1800mm;
- TK6926J CNC Floor Type Boring and Milling MachineDownload
Brief Parameters
Spindle diameter: Φ260mm;
Column travel (X): 4000+n*1000mm;
Spindle box vertical travel (Y): 5000-7000mm;
Spindle axial travel (Z): 1600mm;
Ram travel (W): 1800mm;
Machine specifications
Equipments
Optionals
Features
Machine layout
This machine is of single column, spindle head hang aside, column fixed on saddle, and saddle moves along machine bed guideway, spindle head moves along column guideway, main motion is the spindle rotation.(See below drawing)
Four liner axes are:
1. Column cross travel X
2. Vertical travel of spindle head Y
3. Axial travel of ram W
4. Axial travel of boring spindle Z
Basic parts
Bed, column, ram, and ram saddle are all adopt high quality ageing treated cast iron, and ram is aging treated nodular cast iron. Adopt the FEM to get the highest rigidity. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is with four sides double-layer wall structure.
Guideways
The guideway of the three linear motion coordinates of X, Y and Z all adopt a constant-flow, one-cavity, one-pump closed hydrostatic guide rail support structure. It has the advantages of high bearing capacity, good contact stiffness, small and close dynamic and static friction coefficients, good dynamic response performance, good acceleration performance, no wear, good vibration absorption, low high-frequency vibration, high positioning accuracy, and strong anti-subversion ability.
Spindle system
Spindle consist of hollow spindle (milling spindle) and boring spindle. The bearing spindle adopts the imported bearing, and spindle pull method is disk spring clamping and hydraulic loose; Material of the spindle is 38CrMoAlA electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
Main driven system
Spindle rotation (SP axis) uses 3 steps shift gear box with SIEMENS AC servo motor drive, through gear couple to hollow milling spindle, and realize the rotation of boring spindle. High/middle/low hydraulic auto shift realized by hydraulic controlled oil cylinder dial, and approach switch inspects the dial position. The structure is of large speed area, low power loss, and big output torque. Meanwhile internal the ram constanting oil cycle cooling method adopted to guarantee the rotation accuracy of spindle, reduce the heat thermal deformation (power torque figure below).
Feed mechanism
X axis adopt the double servo driven structure which consist of double servo motor+ high torque planet decelerator +double pinion+ high accuracy rack. The double servo motor controlled by CNC system and through the electrical automatic adjustment method to eliminate transmission gap between pinion and rack, this structure has the transmission accuracy, high efficiency and reliable performance characteristics.
For Y, Z and W axis use SIEMENS 1FT6 AC motor through deceleration device to driven the high rigid preloading roll ball screw rod nut pair to realized each axes’s feed. This kind of structure is compact and reasonable with characteristic of high precision and high transmission efficiency. At the same time, servo motor for Y axis with brake function can prevent the accident of spindle sudden fall when power blankout.
Lubrication
Gears and bearings in gear box are lubricated by mechanical oil, ballscrew couples are lubricated by pouring oil, spindle bearings are lubricated by imported oil air.
Guideway covers
X axis: stainless extendable cover, Y axis: metal loricae type, three sides covered.
Balancing and accuracy compensation mechanism
1. The balance for spindle head is realized by a counter weight which is in column and move together with spindle head.
2. Ram balancing compensation: ram adopts servo following balancing compensation mechanism which consist of servo motor + worm gear and worm reducer+ ball screw pair + wire rope and pulley to form a closed servo balancing system. The basic theory of this system is when ram move to generate gravity change the compensation system will automatically compensate as per setting compensation program to realized nonlinear ram servo balancing compensation.
3. Accessories compensation: Accessories compensation is for different accessories fixed with the machine. It is realized by an oil cavity through an approach switch which inspects and identifies accessories and controls electric hydraulic proportion valve by system.
Hydraulic systems
Independent hydraulic tank to provide the oil its main function is for tool clamp and loose, spindle speed change and machine lubrication. The hydraulic oil and constant temperature oil are separated by each pump. Adopting the oil coolant also enhance the hydraulic unit and hydraulic system reliability. The dimension of hydraulic unit is international standard.
CNC system
Equipped with SINUMERIK 840D SL system, Sinamics servo drive system and SIMATICS7-300 PLC.
Operation cabinet
Machine equipped with operation cabinet which can not only move along with spindle head but also can perform horizontal movement.
Spindle diameter: Φ260mm;
Column travel (X): 4000+n*1000mm;
Spindle box vertical travel (Y): 5000-7000mm;
Spindle axial travel (Z): 1600mm;
Ram travel (W): 1800mm;
Machine specifications
| Items | TK6926J |
| Boring spindle diameter | Ф260mm |
| Spindle taper | ISO 60 |
| Main motor power- servo motor | 105kW |
| Spindle speed | 2-1000rpm |
| Max. Torque of boring head | 22000Nm |
| Size of ram section | 600X725mm |
| Travel | |
| Longitudinal travel of column ( X axis) | 4000+n*1000mm (4-30m) |
| Vertical travel of boring head (Y axis) | 5000-7000mm |
| Boring spindle travel (Z axis) | 1600mm |
| Ram travel (W axis) | 1800mm |
| Feeding speed | |
| Feeding speed of column longitudinal ( X axis) | 1~3000mm/min |
| Feeding speed of boring head (Y axis) | 1~3000mm/min |
| Feeding speed of boring spindle (Z axis) | 1~2000mm/min |
| Feeding speed of ram（W axis） | 1~2000mm/min |
| Rapid travel speed (X axis) | 10000mm/min |
| Rapid travel speed (Y axis) | 8000mm/min |
| Rapid travel speed (Z/W axis) | 6000mm/min |
| Accuracy and Repetitive positioning accuracy | |
| X, Y axis positioning accuracy | ±0.02/1000mm |
| Z, W positioning accuracy | ±0.02/1000mm |
| X, Y repetitive positioning accuracy | ±0.015/1000mm |
| Z, W repetitive positioning accuracy | ±0.015/1000mm |
| Item 01 | Descriptions | |
| 01.01 | SIEMENS840Dsl | |
| 01.02 | Manual pulse generator | |
| 01.03 | Automatic lubrication system | |
| 01.04 | Automatic hydraulic clamping system | |
| 01.05 | X axis guide-way cover | |
| 01.06 | Y axis guide-way cover | |
| 01.07 | Balancing and accuracy compensation mechanism | |
| 01.08 | X/Y/Z liner axis | |
| 01.09 | Tri-color light | |
| 01.10 | Work lamp | |
| 01.11 | Foundation bolts and pads |
| Item 02 | Descriptions | |
| 02.01 | Rotary table | |
| 02.02 | Face plate | |
| 02.03 | Right angle milling head | |
| 02.04 | Universal milling head | |
| 02.05 | Floor bed | |
| 02.06 | 40 or 60 stations ATC |
Machine layout
This machine is of single column, spindle head hang aside, column fixed on saddle, and saddle moves along machine bed guideway, spindle head moves along column guideway, main motion is the spindle rotation.(See below drawing)
Four liner axes are:
1. Column cross travel X
2. Vertical travel of spindle head Y
3. Axial travel of ram W
4. Axial travel of boring spindle Z
Basic parts
Bed, column, ram, and ram saddle are all adopt high quality ageing treated cast iron, and ram is aging treated nodular cast iron. Adopt the FEM to get the highest rigidity. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is with four sides double-layer wall structure.
Guideways
The guideway of the three linear motion coordinates of X, Y and Z all adopt a constant-flow, one-cavity, one-pump closed hydrostatic guide rail support structure. It has the advantages of high bearing capacity, good contact stiffness, small and close dynamic and static friction coefficients, good dynamic response performance, good acceleration performance, no wear, good vibration absorption, low high-frequency vibration, high positioning accuracy, and strong anti-subversion ability.
Spindle system
Spindle consist of hollow spindle (milling spindle) and boring spindle. The bearing spindle adopts the imported bearing, and spindle pull method is disk spring clamping and hydraulic loose; Material of the spindle is 38CrMoAlA electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
Main driven system
Spindle rotation (SP axis) uses 3 steps shift gear box with SIEMENS AC servo motor drive, through gear couple to hollow milling spindle, and realize the rotation of boring spindle. High/middle/low hydraulic auto shift realized by hydraulic controlled oil cylinder dial, and approach switch inspects the dial position. The structure is of large speed area, low power loss, and big output torque. Meanwhile internal the ram constanting oil cycle cooling method adopted to guarantee the rotation accuracy of spindle, reduce the heat thermal deformation (power torque figure below).
Feed mechanism
X axis adopt the double servo driven structure which consist of double servo motor+ high torque planet decelerator +double pinion+ high accuracy rack. The double servo motor controlled by CNC system and through the electrical automatic adjustment method to eliminate transmission gap between pinion and rack, this structure has the transmission accuracy, high efficiency and reliable performance characteristics.
For Y, Z and W axis use SIEMENS 1FT6 AC motor through deceleration device to driven the high rigid preloading roll ball screw rod nut pair to realized each axes’s feed. This kind of structure is compact and reasonable with characteristic of high precision and high transmission efficiency. At the same time, servo motor for Y axis with brake function can prevent the accident of spindle sudden fall when power blankout.
Lubrication
Gears and bearings in gear box are lubricated by mechanical oil, ballscrew couples are lubricated by pouring oil, spindle bearings are lubricated by imported oil air.
Guideway covers
X axis: stainless extendable cover, Y axis: metal loricae type, three sides covered.
Balancing and accuracy compensation mechanism
1. The balance for spindle head is realized by a counter weight which is in column and move together with spindle head.
2. Ram balancing compensation: ram adopts servo following balancing compensation mechanism which consist of servo motor + worm gear and worm reducer+ ball screw pair + wire rope and pulley to form a closed servo balancing system. The basic theory of this system is when ram move to generate gravity change the compensation system will automatically compensate as per setting compensation program to realized nonlinear ram servo balancing compensation.
3. Accessories compensation: Accessories compensation is for different accessories fixed with the machine. It is realized by an oil cavity through an approach switch which inspects and identifies accessories and controls electric hydraulic proportion valve by system.
Hydraulic systems
Independent hydraulic tank to provide the oil its main function is for tool clamp and loose, spindle speed change and machine lubrication. The hydraulic oil and constant temperature oil are separated by each pump. Adopting the oil coolant also enhance the hydraulic unit and hydraulic system reliability. The dimension of hydraulic unit is international standard.
CNC system
Equipped with SINUMERIK 840D SL system, Sinamics servo drive system and SIMATICS7-300 PLC.
Operation cabinet
Machine equipped with operation cabinet which can not only move along with spindle head but also can perform horizontal movement.
Brief Parameters
Spindle diameter: Φ260mm;
Column travel (X): 4000+n*1000mm;
Spindle box vertical travel (Y): 5000-7000mm;
Spindle axial travel (Z): 1600mm;
Ram travel (W): 1800mm;
Spindle diameter: Φ260mm;
Column travel (X): 4000+n*1000mm;
Spindle box vertical travel (Y): 5000-7000mm;
Spindle axial travel (Z): 1600mm;
Ram travel (W): 1800mm;
Machine layout
This machine is of single column, spindle head hang aside, column fixed on saddle, and saddle moves along machine bed guideway, spindle head moves along column guideway, main motion is the spindle rotation.(See below drawing)
Four liner axes are:
1. Column cross travel X
2. Vertical travel of spindle head Y
3. Axial travel of ram W
4. Axial travel of boring spindle Z
Basic parts
Bed, column, ram, and ram saddle are all adopt high quality ageing treated cast iron, and ram is aging treated nodular cast iron. Adopt the FEM to get the highest rigidity. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is with four sides double-layer wall structure.
Guideways
The guideway of the three linear motion coordinates of X, Y and Z all adopt a constant-flow, one-cavity, one-pump closed hydrostatic guide rail support structure. It has the advantages of high bearing capacity, good contact stiffness, small and close dynamic and static friction coefficients, good dynamic response performance, good acceleration performance, no wear, good vibration absorption, low high-frequency vibration, high positioning accuracy, and strong anti-subversion ability.
Spindle system
Spindle consist of hollow spindle (milling spindle) and boring spindle. The bearing spindle adopts the imported bearing, and spindle pull method is disk spring clamping and hydraulic loose; Material of the spindle is 38CrMoAlA electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
Main driven system
Spindle rotation (SP axis) uses 3 steps shift gear box with SIEMENS AC servo motor drive, through gear couple to hollow milling spindle, and realize the rotation of boring spindle. High/middle/low hydraulic auto shift realized by hydraulic controlled oil cylinder dial, and approach switch inspects the dial position. The structure is of large speed area, low power loss, and big output torque. Meanwhile internal the ram constanting oil cycle cooling method adopted to guarantee the rotation accuracy of spindle, reduce the heat thermal deformation (power torque figure below).
Feed mechanism
X axis adopt the double servo driven structure which consist of double servo motor+ high torque planet decelerator +double pinion+ high accuracy rack. The double servo motor controlled by CNC system and through the electrical automatic adjustment method to eliminate transmission gap between pinion and rack, this structure has the transmission accuracy, high efficiency and reliable performance characteristics.
For Y, Z and W axis use SIEMENS 1FT6 AC motor through deceleration device to driven the high rigid preloading roll ball screw rod nut pair to realized each axes’s feed. This kind of structure is compact and reasonable with characteristic of high precision and high transmission efficiency. At the same time, servo motor for Y axis with brake function can prevent the accident of spindle sudden fall when power blankout.
Lubrication
Gears and bearings in gear box are lubricated by mechanical oil, ballscrew couples are lubricated by pouring oil, spindle bearings are lubricated by imported oil air.
Guideway covers
X axis: stainless extendable cover, Y axis: metal loricae type, three sides covered.
Balancing and accuracy compensation mechanism
1. The balance for spindle head is realized by a counter weight which is in column and move together with spindle head.
2. Ram balancing compensation: ram adopts servo following balancing compensation mechanism which consist of servo motor + worm gear and worm reducer+ ball screw pair + wire rope and pulley to form a closed servo balancing system. The basic theory of this system is when ram move to generate gravity change the compensation system will automatically compensate as per setting compensation program to realized nonlinear ram servo balancing compensation.
3. Accessories compensation: Accessories compensation is for different accessories fixed with the machine. It is realized by an oil cavity through an approach switch which inspects and identifies accessories and controls electric hydraulic proportion valve by system.
Hydraulic systems
Independent hydraulic tank to provide the oil its main function is for tool clamp and loose, spindle speed change and machine lubrication. The hydraulic oil and constant temperature oil are separated by each pump. Adopting the oil coolant also enhance the hydraulic unit and hydraulic system reliability. The dimension of hydraulic unit is international standard.
CNC system
Equipped with SINUMERIK 840D SL system, Sinamics servo drive system and SIMATICS7-300 PLC.
Operation cabinet
Machine equipped with operation cabinet which can not only move along with spindle head but also can perform horizontal movement.
This machine is of single column, spindle head hang aside, column fixed on saddle, and saddle moves along machine bed guideway, spindle head moves along column guideway, main motion is the spindle rotation.(See below drawing)
Four liner axes are:
1. Column cross travel X
2. Vertical travel of spindle head Y
3. Axial travel of ram W
4. Axial travel of boring spindle Z
Basic parts
Bed, column, ram, and ram saddle are all adopt high quality ageing treated cast iron, and ram is aging treated nodular cast iron. Adopt the FEM to get the highest rigidity. The bed is closed boxy shape with reinforce rod and reasonable multi supporting points. The column is with four sides double-layer wall structure.
Guideways
The guideway of the three linear motion coordinates of X, Y and Z all adopt a constant-flow, one-cavity, one-pump closed hydrostatic guide rail support structure. It has the advantages of high bearing capacity, good contact stiffness, small and close dynamic and static friction coefficients, good dynamic response performance, good acceleration performance, no wear, good vibration absorption, low high-frequency vibration, high positioning accuracy, and strong anti-subversion ability.
Spindle system
Spindle consist of hollow spindle (milling spindle) and boring spindle. The bearing spindle adopts the imported bearing, and spindle pull method is disk spring clamping and hydraulic loose; Material of the spindle is 38CrMoAlA electroslag-refined, nitrated steel. Over 30 operations are required for processing the spindle and its mirror surface has ground and lapped.
Main driven system
Spindle rotation (SP axis) uses 3 steps shift gear box with SIEMENS AC servo motor drive, through gear couple to hollow milling spindle, and realize the rotation of boring spindle. High/middle/low hydraulic auto shift realized by hydraulic controlled oil cylinder dial, and approach switch inspects the dial position. The structure is of large speed area, low power loss, and big output torque. Meanwhile internal the ram constanting oil cycle cooling method adopted to guarantee the rotation accuracy of spindle, reduce the heat thermal deformation (power torque figure below).
Feed mechanism
X axis adopt the double servo driven structure which consist of double servo motor+ high torque planet decelerator +double pinion+ high accuracy rack. The double servo motor controlled by CNC system and through the electrical automatic adjustment method to eliminate transmission gap between pinion and rack, this structure has the transmission accuracy, high efficiency and reliable performance characteristics.
For Y, Z and W axis use SIEMENS 1FT6 AC motor through deceleration device to driven the high rigid preloading roll ball screw rod nut pair to realized each axes’s feed. This kind of structure is compact and reasonable with characteristic of high precision and high transmission efficiency. At the same time, servo motor for Y axis with brake function can prevent the accident of spindle sudden fall when power blankout.
Lubrication
Gears and bearings in gear box are lubricated by mechanical oil, ballscrew couples are lubricated by pouring oil, spindle bearings are lubricated by imported oil air.
Guideway covers
X axis: stainless extendable cover, Y axis: metal loricae type, three sides covered.
Balancing and accuracy compensation mechanism
1. The balance for spindle head is realized by a counter weight which is in column and move together with spindle head.
2. Ram balancing compensation: ram adopts servo following balancing compensation mechanism which consist of servo motor + worm gear and worm reducer+ ball screw pair + wire rope and pulley to form a closed servo balancing system. The basic theory of this system is when ram move to generate gravity change the compensation system will automatically compensate as per setting compensation program to realized nonlinear ram servo balancing compensation.
3. Accessories compensation: Accessories compensation is for different accessories fixed with the machine. It is realized by an oil cavity through an approach switch which inspects and identifies accessories and controls electric hydraulic proportion valve by system.
Hydraulic systems
Independent hydraulic tank to provide the oil its main function is for tool clamp and loose, spindle speed change and machine lubrication. The hydraulic oil and constant temperature oil are separated by each pump. Adopting the oil coolant also enhance the hydraulic unit and hydraulic system reliability. The dimension of hydraulic unit is international standard.
CNC system
Equipped with SINUMERIK 840D SL system, Sinamics servo drive system and SIMATICS7-300 PLC.
Operation cabinet
Machine equipped with operation cabinet which can not only move along with spindle head but also can perform horizontal movement.
| Items | TK6926J |
| Boring spindle diameter | Ф260mm |
| Spindle taper | ISO 60 |
| Main motor power- servo motor | 105kW |
| Spindle speed | 2-1000rpm |
| Max. Torque of boring head | 22000Nm |
| Size of ram section | 600X725mm |
| Travel | |
| Longitudinal travel of column ( X axis) | 4000+n*1000mm (4-30m) |
| Vertical travel of boring head (Y axis) | 5000-7000mm |
| Boring spindle travel (Z axis) | 1600mm |
| Ram travel (W axis) | 1800mm |
| Feeding speed | |
| Feeding speed of column longitudinal ( X axis) | 1~3000mm/min |
| Feeding speed of boring head (Y axis) | 1~3000mm/min |
| Feeding speed of boring spindle (Z axis) | 1~2000mm/min |
| Feeding speed of ram（W axis） | 1~2000mm/min |
| Rapid travel speed (X axis) | 10000mm/min |
| Rapid travel speed (Y axis) | 8000mm/min |
| Rapid travel speed (Z/W axis) | 6000mm/min |
| Accuracy and Repetitive positioning accuracy | |
| X, Y axis positioning accuracy | ±0.02/1000mm |
| Z, W positioning accuracy | ±0.02/1000mm |
| X, Y repetitive positioning accuracy | ±0.015/1000mm |
| Z, W repetitive positioning accuracy | ±0.015/1000mm |
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Knee Type Milling Machine: Precision Versatility for Industrial Manufacturing
What is a Knee Type Milling Machine?
A knee type milling machine is a fundamental machine tool distinguished by its vertically adjustable worktable mounted on a "knee" casting. This knee moves precisely up and down a fixed column via a screw mechanism, enabling accurate Z-axis positioning crucial for diverse milling operations.
Working Principle
The core principle involves a rotating milling cutter removing material from a workpiece secured to the table. The adjustable knee mechanism allows controlled vertical movement (Z-axis), while the table provides longitudinal (X-axis) and transverse (Y-axis) travel. This 3-axis control facilitates complex machining of flat, angular, and contoured surfaces.
Key Applications
- Tool & Die Making: Precision molds, jigs, fixtures
- Prototyping: Rapid part development
- Maintenance Shops: Equipment repair & part fabrication
- General Machining: Slotting, drilling, facing, keyway cutting
- Aerospace & Automotive: Component manufacturing
Distinctive Features & Advantages
- Vertical Adjustability: Knee movement enables quick workpiece height changes
- Rigid Construction: Robust cast iron frame ensures stability
- Manual & CNC Options: Traditional control or computer numerical precision
- Turret Design (Common): Swiveling milling head for multi-angle machining
- Wide Workpiece Compatibility: Handles various sizes and shapes
Primary Classifications
- Vertical Knee Mill: Spindle axis perpendicular to table (most common)
- Horizontal Knee Mill: Spindle axis parallel to table (for heavy stock removal)
- Universal Knee Mill: Table swivels for complex angular cuts
- Turret Mill: Head rotates on turret for flexible positioning
Main Components
- Base & Column: Primary support structure
- Knee: Vertically moving saddle supporting the table
- Saddle & Table: Hold and position the workpiece (X/Y axes)
- Milling Head: Houses spindle, motor, and quill (Z-axis)
- Arbor/Spindle: Rotating shaft holding cutting tools
- Controls: Manual handwheels or CNC interface
Evolution & Industry Significance
Since their development in the late 19th century, knee-and-column mills revolutionized machining. The iconic Bridgeport design (1938) popularized the turret style. While CNC machining centers dominate high-volume production, knee mills remain indispensable for flexibility, ease of use, and cost-effectiveness in job shops, schools, and repair facilities worldwide.
Fortune Pacific: Your Knee Mill Solution
At Fortune Pacific, we engineer durable, high-precision knee type milling machines for demanding applications. Explore our range of vertical mills, horizontal mills, and CNC-ready models designed to enhance your workshop's capabilities. Discover the ideal machine for your metalworking, prototyping, or toolmaking needs.
Keywords: Knee Type Milling Machine, Vertical Milling Machine, Horizontal Mill, Turret Mill, Knee-and-Column Mill, Milling Machine for Sale, Industrial Milling, Metalworking Equipment, Workshop Machinery, CNC Mill, Toolroom Mill, Precision Machining, Fortune Pacific, Machine Tool Manufacturer.