Used Centre Lathe for sale (8,592)

Condition: used, Year of construction: 1971, functionality: fully functional, For sale: this lathe is connected and can be tested. A video of the machine can be sent via WhatsApp. Swing diameter over bed: 1,000 mm. Turning length: 12,000 mm. Hjdpfx Agexwqk Sjfsff

Condition: good (used), functionality: fully functional, turning diameter: 655 mm, turning diameter over bed slide: 655 mm, turning length: 5,000 mm, Swing diameter over bed 655 mm Swing diameter over support 390 mm Turning length 5000 mm Hfodew N D T Sspfx Agfsf Spindle bore 82 mm Spindle speed 9-1120 rpm Feed rate 0.049-3 mm/rev Total connected load 12 kW

Condition: excellent (used), Harrison V390 Vari Speed Gap Bed Lathe (2004) Model V390 Year 2004 Condition Used Swing Over Bed 400mm Distance Between Centres 1250mm Swing Over Cross Slide 246mm Height of Centres 195mm Bed Length between Centres 1250mm Swing over Bed 400mm Swing in Gap 585mm Swing over Cross Slide 246mm Spindle Bore 54mm Morse Taper in Nose Bush No. 4 MT Hfodpsxwkwxofx Agfof

Condition: excellent (used), Distance between points 1000mm Machinable Diameter on Baseplate 575 mm Diameter Machinable on Trolley 300 mm Longitudinal Bed Width 410 mm Machine Speed Range 20- 1600 rpm No. of speeds 16 speeds Head Pitch Ø 52 mm Tailstock shank Ø 70 mm Tailstock Stroke 220 mm Main engine power 12 H.P. Machine weight 2200kg Machine dimensions 3300 x 1300 x 1500 mm Machine rebuilt and painted in RAL 7031 color. Main motor winding 380-660V Second hand 315mm chuck Suitable to R.D. 1215/97 with national safety protections of tempered glass. Hedevi Rviopfx Agfeff Equipment certified by OCA Authorized Control Body. Instruction book

Condition: good (used), turning diameter over cross slide: 380 mm, spindle bore: 70 mm, turning diameter: 640 mm, turning diameter over bed slide: 900 mm, Characteristics: Length between points: 2.000mm Diameter admitted on bed: 640mm Diameter admitted on carriage: 380mm Diameter admitted on neckline: 900mm Shank pitch: 70mm Includes: 400mm 3-jaw chuck 390mm 4 independent jaw chuck Open steady rest and closed steady rest Hsdsudh Slspfx Agfoff Quick-change toolholder with 4 tool holders.

Condition: excellent (used), turning diameter over cross slide: 1,100 mm, spindle bore: 102 mm, turning diameter: 1,600 mm, turning diameter over bed slide: 1,950 mm, center height in crank: 800 mm, Lathe Gurutzpe Super BT 800 x 2000 mm e.p,with dimension display,turning on bed 1580mm,on cross slide 1100mm,on the neckline 1950mm,length of the neckline in front of the chuck 620mm,shank hole 102mm,36 speeds 2,8-400rpm,motor 30cv,4-jaw independent chuck diameter 1400mm, bed width 800mm, tailstock shaft diameter 180mm, lathe with dimension display, max weight on lathe between points 10tns with one steady rest 12tns, estimated weight of lathe and tooling 14450kg. Hfodpfsq R Rknex Agfsf

Condition: not inspected (used), functionality: unexamined, No minimum price – guaranteed sale to the highest bidder! Placing a bid commits you to timely collection, either between 11.05.2026 and 13.05.2026 or between 18.05.2026 and 21.05.2026! Auction of lathe accessories such as collets, tool holders, driven tools, and more! MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 1,200 x 800 x 200 mm Weight: 200 kg Hfjdpfoynzyyjx Agfof External reference: Pieper – Lot 136

Condition: not inspected (used), functionality: unexamined, No reserve price – guaranteed sale to the highest bidder! Bidding commits you to timely collection either between 11.05.2026 and 13.05.2026 or between 18.05.2026 and 21.05.2026! TECHNICAL DETAILS 26 units (various versions) MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 1200 x 800 x 200 mm Machine weight: 300 kg External reference: Pieper - Lot 121 Hodpfx Asynzpzsgfjff

Condition: not inspected (used), functionality: unexamined, No reserve price – guaranteed sale to the highest bidder! Hedsyn Agnopfx Agfsff Placing a bid obligates you to collect the item within the specified period, either between 11/05/2026 and 13/05/2026 or between 18/05/2026 and 21/05/2026! The auction consists of various VDI 30 and VDI 40 tool holders (one of them driven), a drill stand, and additional accessories! MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 1,200 x 800 x 300 mm Weight: 150 kg External reference: Pieper - Lot 4

Condition: good (used), Toolholders bought in company where used for Biglia machine Hfjdeyuyhispfx Agfsf

Condition: new, Year of construction: 2025, turning diameter over cross slide: 250 mm, turning length: 730 mm, turning diameter: 500 mm, spindle speed (max.): 1,800 rpm, CNC lathe machine CK 6150 with flat bed We offer a new CNC lathe machine model CK6150. We use this machine in our production and you can see it in operation before ordering. The CK 6150 lathe has a flat bed and hardening guides, which ensures a long period of operation of the equipment. The machine is equipped with a CNC system, the GSK CNC system is installed as standard. Optionally, the machine can be equipped with a Fanuc or Siemens CNC system. The machine can have a tool holder for 4-6 or 8 tools, depending on the customer's wishes. It is possible to install a hydraulic chuck on the machine, which will greatly simplify the process of installing parts on it and a hydraulic tailstock. The CK 6150 lathe can be equipped with additional supporting frame for more accurate manufacturing of long parts. Technical specifications: Model CK 6150 x 1000 Maximum workpiece diameter over bed 500 mm Maximum workpiece diameter over support 250 mm Maximum workpiece length 1000 mm Maximum turning length 730 mm Spindle bore diameter 82 mm Spindle speed 150-1800 rpm Engine power 7.5 kW Mechanical chuck (hydraulic optional) Chuck size 250 mm. 4-position tool holder (6 or 8 optional) Maximum tool size for tool holder 25x25 mm Machine weight 2700 kg Machine dimensions 2650×1700×1820 mm We can also supply lathes CK 6140, CK 6150 and CK 6160 with other dimensions of the working part: CK 6140 dimensions of the working part 550/750 mm CK 6150 dimensions of the working part 1000/1500/2000 mm CK 6160 dimensions of the working part 1000/1500/2000 mm CK 6152E dimensions of the working part 1000/1500/2000/3000 mm CK 6165E dimensions of the working part 1000/1500/2000/3000 mm CK 6165E dimensions of the working part 1000/1500/2000/3000 mm CK 6185E dimensions of the working part 1000/1500/2000/3000/4000 mm CK 61100E dimensions of the working part 1000/1500/2000/3000 mm Hfjdpjxdmgvofx Agfef CK 61125E dimensions of the working part 1000/1500/2000/3000 mm

Condition: not inspected (used), functionality: unexamined, No reserve price – guaranteed sale to the highest bidder! Placing a bid commits you to timely collection, either between 11.05.2026 and 13.05.2026 or between 18.05.2026 and 21.05.2026! Auction of lathe accessories including turning tools, boring bars, and internally cooled drills! MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 1,200 x 800 x 100 mm Weight: 150 kg Hfsdpfoynz Ecjx Agfof External reference: Pieper - Lot 133

Condition: used, Year of construction: 2012, functionality: fully functional, machine/vehicle number: G3169-0110, turning length: 530 mm, turning diameter: 420 mm, spindle speed (min.): 20 rpm, spindle speed (max.): 4,000 rpm, spindle bore: 65 mm, travel distance X-axis: 220 mm, travel distance Y-axis: 80 mm, travel distance Z-axis: 550 mm, overall weight: 4,700 kg, turning diameter over bed slide: 800 mm, HYUNDAI WIA L200SY CNC TURNING CENTER Year: 2012 | Fanuc 18i-TB CNC Control SN: G3169-0110 • 5-Axis CNC Turning Center – Hyundai WIA L200SY • Main Chuck: 8″ | Sub Spindle: 5″ • Live Tooling & Y-Axis + C-Axis indexing Hedpfx Aex I A Hcjgfjff • Max Turning Diameter: approx. 419–420 mm / 16.5″ • Max Turning Length: approx. 520–530 mm / ~20.5–20.9″ • Swing Over Bed: approx. 800 mm / 31.5″ • X Travel: approx. 220 mm / 8.7″ • Z Travel: approx. 550 mm / 21.7″ • Y Travel: approx. 80 mm / 3.1″ • Max Spindle Speed: up to 4,000 rpm • Main Spindle Power: ~20 HP (~15 kW) • Sub Spindle Speed up to 6,000 rpm • C-Axis indexing: 0.001° possible • Tool Stations: approx. 12 • Coolant system and chip conveyor included • Approx. Dimensions: 120″ × 68″ × 80″ • Approx. Weight: ~10,500 lbs (~4,760 kg) NOTE: MACHINE WAS REMOVED FROM GOOD WORKING CONDITION 2 YEARS AGO. PLANNED TO PUT BACK IN SERVICE BUT SELLER WILL NO LONGER BE DOING MACHINING.

Condition: excellent (used), Model: 4M/65E Condition: Very good Dimensions: 80.00 (H) x 60.00 (W) x 120.00 (L) inches Additional Description: - Automatic copy lathe Hfsdpfxexz Tfao Agfsf - To make spades, shovels, curling's, gun holders, axes, legs, cricket bats and so on. - Makes 4 pieces at the same time. - Router (no sanding attachment) - Speed regulation on slide. - Works great

Condition: good (used), Year of construction: 2012, functionality: fully functional, Schiess CNC vertical lathe with C axis, year 1992, retrofitted in 2012 CNC: NUM 1060 FLEXIUM 2 tables, table diameter 2000mm – max turning diameter 2500mm – max table speed 201 rpm – table power 56 KW Load capacity (table included): 16,000kg Movable crossrail with 12 positions, 50mm pitch Available space under spindle nose: min. 795mm, max. 1345mm RAM Z stroke: 1000mm C axis with 360,000 positions – milling spindle max speed 1600 rpm – milling spindle power 22KW – 2 gear ranges Tool magazine: 20 turning tool positions, 35 milling tool positions 1 milling head WIDAFLEX UTS80 1 milling head ISO 50 Hodpsxpqm Rofx Agfeff Renishaw MP60 touch probe (for parts) Tool presetter – Transmit function: G20 / G21 – No rigid tapping Chip conveyor Front door: partial opening M0 / full opening

Condition: excellent (used), Broadbent Heavy Duty Lathe 1041mm x 10,000mm Year approx. 1973. Swing over bed 1041mm (41”) Hodpfjwhylvex Agfoff Swing bin gap1575mm (62”) Distance between centres 9300mm (30’ 6”) Spindle bore 115m (4 ½”) Spindle speeds (18) 3.3 – 360 rpm Spindle motor 30 HP or 40 HP (To be confirmed) Tailstock 6 MT Imperial & Metric screw-cutting with change gears. 36” Faceplate with 4 adjustable jaws, 54” Faceplate, Taper turning attachment, Power feed to top slide, 2 x 18” 3 point steadies, 24”/28” Steady.

Year of construction: 2005, condition: not inspected (used), functionality: unexamined, travel distance X-axis: 200 mm, travel distance Z-axis: 500 mm, controller model: SIEMENS SINUMERIK, overall weight: 8,000 kg, turning length: 800 mm, machine/vehicle number: 500571, Equipment: chip conveyor, No minimum price – guaranteed sale to the highest bidder! Placing a bid obligates the buyer to collect the item within either May 11–13, 2026, or May 18–21, 2026, without exception. TECHNICAL DETAILS Travel X-axis: approx. 200 mm Travel Z-axis: approx. 500 mm Spindle bore: approx. 100 mm Turning length approx.: 800 mm MACHINE DETAILS Control: SIEMENS SINUMERIK Operating voltage: 400 V Rated current: 80 A Connected load: 47 kW Frequency: 50 Hz Dimensions & Weight Dimensions (L x W x H): 6,000 x 3,000 x 3,300 mm Weight: 8,000 kg EQUIPMENT Double turret with 12-position tool turret each Tailstock Main spindle Chip conveyor Two manuals BÜCHEL brand extraction filter Note: Machine can be transported on a standard truck. External reference: Pieper - Lot 50 Hsdjynhd Sjpfx Agfjff

Condition: not inspected (used), functionality: unexamined, turning length: 3,000 mm, spindle speed (max.): 1,800 rpm, overall weight: 8,000 kg, three-jaw chuck diameter: 310 mm, No reserve price – guaranteed sale to the highest bidder! Bidding obligates the buyer to collect the machine within one of the specified periods: either between 11/05/2026 and 13/05/2026 or between 18/05/2026 and 21/05/2026. TECHNICAL DETAILS Turning length: 3,000 mm Center height over bed: 300 mm Swing diameter over bed: 600 mm Center height over carriage: 200 mm Swing diameter over carriage: 400 mm Spindle speed: 9 to 1,800 rpm Spindle bore: 110 mm Three-jaw chuck diameter: 310 mm Steady rest diameter: 200 mm MACHINE DETAILS Dimensions & Weight Dimensions (L x W x H): 6,000 x 1,400 x 2,000 mm Weight: 8,000 kg EQUIPMENT Tailstock Multifix turning tool holder Three-jaw chuck Hodpsym Dcuefx Agfsff Two-axis digital readout (SONY) Steady rest External Reference: Pieper – Lot 57

Condition: ready for operation (used), Year of construction: 1996, operating hours: 46,282 h, functionality: fully functional, controller model: TX 8F, counter spindle speed (max.): 4,000 rpm, workpiece diameter (max.): 56 mm, Equipment: bar feeder, chip conveyor, No reserve price – guaranteed sale to the highest bidder! Submitting a bid obligates you to collect the item within the specified period, either between 11/05/2026 and 13/05/2026 or between 18/05/2026 and 21/05/2026. TECHNICAL DETAILS Max. counter-spindle speed: 4,000 rpm Hfjdjym A E Ispfx Agfof Max. workpiece diameter: 56 mm Rapid traverse: max. 15 m/min Fine interpolation cycle: 0.34 ms Maximum thread pitch: 999,999 mm Maximum radius: 99,999.999 mm Feed override: 0–200% Rapid traverse override: 0–100% Spindle speed override: 50–120% Workpiece removal via counter spindle Programming: EIA and ISO code Input/output resolution: X/Z: 0.001 mm, C-axis: 0.001° C-AXIS Main spindle: Max. speed: 80 rpm Torque at 100% duty cycle: 100 Nm Accuracy: +/- 3 arcmin Counter spindle: Max. speed: 80 rpm Torque at 100% duty cycle: 30 Nm Accuracy: +/- 3 arcmin Tool Turret 1 & 2 Driven tools per turret: 10 (14) Max. speed: 4,000 (8,000) rpm Power at 100% duty cycle: 1.5 kW Power at 15% duty cycle: 4 kW Torque at 15% duty cycle: 12.4 (4) Nm Number of tool holders per turret: 10 (14) Cylindrical shank as per DIN 69880: Ø 30 x 55 (25 x 48) mm Tool cross-section: 20 x 20 (16 x 16) mm Chip-to-chip time according to VDI 2852: 1.2 s Index time per station: 0.6 s Over 5 stations: 1.5 s Counter spindle (numerically controlled in Z-direction) Max. speed: 4,000 rpm Max. clamping diameter: 65 mm Continuously programmable AC motor: 11 kW Torque: 210 Nm Feed force at 100% duty cycle: 6,000 N Feed travel: 520 mm Ball screw: Ø 32 x 10 mm MACHINE DETAILS Control: TX 8F Operating voltage: 400 V Frequency: 50 Hz Control voltage: 230 V Rated current: 85 A Connection: 54 kW Connected load: 39 kW Noise emission at operator station: 71 dB(A) Hydraulics System pressure: 60 bar Tank capacity: 150 l Coolant Per tool turret: single-stage centrifugal pump Pump pressure: 5/12 bar Tank capacity without chip conveyor: 300 l Tank capacity with chip conveyor: 280 l Dimensions & Weight Dimensions (L x W x H): 11,000 x 2,000 x 2,600 mm Weight: 6,000 kg Read operating hours: 46,282 h EQUIPMENT STAMAG bar feeder Chip conveyor Hainbuch chucking system Two 10-station turrets with driven tool stations Counter spindle External reference: L. Schaible

Condition: ready for operation (used), Year of construction: 1997, functionality: fully functional, machine/vehicle number: 315357, turning diameter over cross slide: 420 mm, turning length: 1,000 mm, turning diameter: 600 mm, spindle speed (max.): 3,200 rpm, controller model: Eltropilot Heidenhain, TECHNICAL DETAILS Turning length: 1,000 mm Swing diameter over bed cover: 600 mm Swing diameter over cross-slide: 420 mm Travel distance X-axis: 275 mm Travel distance Z-axis: 1,065 mm Main Spindle Speed range: 16 – 3,200 rpm Drive power: 27 kW Max. torque: 800 Nm Spindle diameter at front bearing: 120 mm Spindle bore: 85 mm Chuck diameter: 260 mm Spindle nose: 220H5 Tool Turret Number of tool stations: 12 Tool shank diameter: 40 mm Turret indexing time: 0.8 s Tailstock Quill diameter: 100 mm Quill stroke: 120 mm Tailstock taper: MK 5 Max. quill pressure: 9,500 N Hfsdsyxmurspfx Agfef Feeds Rapid traverse X-axis: 10 m/min Rapid traverse Z-axis: 15 m/min Feed force X-direction: 5,000 N Feed force Z-direction: 1,000 N MACHINE DETAILS CNC control: Eltropilot Heidenhain Operating voltage: 400 V Frequency: 50 Hz Operating current: 76 A Total power requirement: 52 kVA Dimensions & Weight Floor space required: approx. 5.5 x 2.5 x 2.1 m Machine weight: approx. 7.5 t EQUIPMENT Documentation Chip conveyor Coolant system Tailstock Hydraulic unit Three-jaw chuck (Model: SMW KNCS-N-260-72) Note: An RMS sensor is installed in the machine!

Condition: ready for operation (used), Year of construction: 2005, operating hours: 21,600 h, functionality: fully functional, machine/vehicle number: 80439430900, turning diameter over cross slide: 465 mm, turning diameter: 680 mm, spindle speed (max.): 3,500 rpm, travel distance X-axis: 300 mm, travel distance Z-axis: 1,050 mm, distance between centers: 1,150 mm, TECHNICAL DETAILS Max. spindle speed: 3,500 rpm Centre distance: 1,150 mm Centre height: 360 mm Z-axis travel: 1,050 mm X-axis travel: 300 mm Swing diameter over bed: 680 mm Swing diameter over cross slide: 465 mm Rapid traverse Z-axis: 30 m/min Rapid traverse X-axis: 30 m/min Linear axis X and Z measuring system resolution: 0.001 mm Max. workpiece weight between centres: 350 kg Hodpfjyw H E Usx Agfjff Centre taper: MK 5 MACHINE DETAILS Operating voltage: 400 V Frequency: 50 Hz Operating current: 80 A Machine weight: 7,500 kg EQUIPMENT Röhm power chuck (Röhm Duro-NC 260/3) Tool holders

Condition: ready for operation (used), Year of construction: 2014, functionality: fully functional, machine/vehicle number: M034362CAFG, turning length: 209 mm, travel distance X-axis: 100 mm, travel distance Z-axis: 300 mm, turning diameter over bed slide: 550 mm, controller model: FANUC SERIES 0i-TD, No reserve price – guaranteed sale to the highest bidder! Submitting a bid commits you to collecting the machine within the specified periods: either between 11/05/2026 and 13/05/2026 or between 18/05/2026 and 21/05/2026. TECHNICAL DETAILS Swing diameter over bed: 550 mm Maximum turning length: 209 mm Travel distance X-axis: 100 mm Travel distance Z-axis: 300 mm Spindle bore: 62 mm Rotational speed of driven tools: 5,000 rpm Spindle speed: 4,500 rpm Maximum bar diameter: 51 mm Hjdjyng Nmopfx Agfeff Feed rate X-axis: 170 mm/min Feed rate Z-axis: 335 mm/min Rapid traverse (X and Z axis): 36 m/min Tailstock quill diameter: 60 mm MACHINE DETAILS Control: FANUC SERIES 0i-TD Operating voltage: 400 V Frequency: 50 Hz Rated current: 75 A Dimensions & Weight Dimensions (L x W x H): 3,500 x 2,000 x 2,200 mm Weight: 4,000 kg EQUIPMENT 12-position tool changer Driven tool stations Chip conveyor External reference: Elos - Lot 15

Condition: ready for operation (used), Year of construction: 2017, functionality: fully functional, machine/vehicle number: 5012221, spindle bore: 58 mm, spindle speed (max.): 2,000 rpm, overall weight: 1,700 kg, center width: 760 mm, bed width: 300 mm, No reserve price – guaranteed sale to the highest bidder! Submitting a bid obligates you to collect the item within the specified period, either between 11/05/2026 and 13/05/2026 or between 18/05/2026 and 21/05/2026. Hfsdjym A Amspfx Agfef TECHNICAL DETAILS Swing diameter over bed: 430 mm Swing diameter over cross slide: 240 mm Swing diameter over gap: 690 mm Distance between centers: 760 mm Bed width: 300 mm Spindle bore: 58 mm Spindle speed: 20 - 2,000 rpm Longitudinal feeds: 0.05 - 0.82 mm/rev Cross feeds: 0.02 - 0.4 mm/rev Metric threads: 0.5 - 7 mm Lead screw diameter: 35 mm Lead screw pitch: 6 mm Tailstock quill diameter: 58 mm Tailstock quill travel: 150 mm Quill taper: MT4 MACHINE DETAILS Dimensions & weight Dimensions (L x W x H): 1,890 x 900 x 1,800 mm Weight: 1,700 kg External reference: Limani/Maric

Condition: not inspected (used), Year of construction: 2005, functionality: unexamined, machine/vehicle number: BE55324S, turning length: 300 mm, travel distance X-axis: 100 mm, travel distance Z-axis: 250 mm, overall weight: 5,000 kg, controller model: FANUC SERIES 18i-TB, No reserve price – guaranteed sale to the highest bidder! Placing a bid obligates the buyer to timely collection, either between 11.05.2026 and 13.05.2026 or between 18.05.2026 and 21.05.2026! Hodpfx Ajym Ax Iogfsff TECHNICAL DETAILS Turning length: approx. 300 mm Travel distance X-axis: approx. 100 mm Travel distance Z-axis: approx. 250 mm MACHINE DETAILS Control: FANUC SERIES 18i-TB Connected load: 36 kW Operating voltage: 200/220 V Frequency: 50/60 Hz Dimensions & Weight Dimensions (L x W x H): 8,000 x 2,000 x 2,200 mm Weight: 5,000 kg EQUIPMENT Main spindle with HAINBUCH chuck Counter spindle with HAINBUCH chuck Double turret, each featuring 12 tool stations Bar feeder by BREUNING SIMAG, type: 42.1 R-3000 External reference: Pieper – Lot 111

Condition: ready for operation (used), Year of construction: 1987, functionality: fully functional, machine/vehicle number: 08500, turning diameter over cross slide: 225 mm, turning length: 1,000 mm, turning diameter: 400 mm, spindle speed (max.): 4,000 rpm, controller model: EPL 2, TECHNICAL DETAILS Maximum turning diameter: 400 mm Turning length: 1,000 mm Swing diameter over bed: 400 mm Swing diameter over cross slide: 225 mm X-axis travel: 260 mm Z-axis travel: 1,040 mm Main spindle Speed range: 20 - 4,000 rpm Drive power: 11 kW Maximum torque: 75 Nm Spindle bore: 72 mm Chuck diameter: 185 mm Spindle nose: 140H5 Spindle diameter at front bearing: 100 mm Tool turret Number of tool stations: 12 positions Tailstock Quill diameter: 80 mm Quill stroke: 100 mm Tailstock taper: MT 4 Maximum quill pressure: 8,000 N Feeds Rapid traverse (X/Z axis): 10 m/min Feed speed (X/Z axis): 5 m/min Feed force (X axis): 5,000 N Feed force (Z axis): 8,000 N MACHINE DETAILS Control model: EPL 2 Operating voltage: 380 V Frequency: 50 Hz Operating current: 76 A Total power requirement: 29 kW Dimensions & Weight Hsdpfoyxm Tnjx Agfsff Space requirement approx.: 4.6 x 2.1 x 2.0 m Machine weight approx.: 4.0 t EQUIPMENT Chip conveyor Three-jaw chuck Documentation