Used Centering Ball for sale (15,128)

Condition: used, Year of construction: 2009, x-travel . mm y-travel . mm z-travel . mm control SIemens type 840 D ECOLINE Shopmill Tool changer 30 Fach dimensions of the machine ca. . m Workpiece width: Max. 550 mm Workpiece length: Max. 1300 mm Workpiece height: Max. 600 mm The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team Iaedpfxjzdu Tdo Acgsu

Condition: good (used), Year of construction: 2009, functionality: fully functional, 3 x Hyundai-Kia / WIA VX500 CNC Vertical Machining Centers A total of 3 identically equipped Hyundai-Kia / WIA VX500 CNC vertical machining centers are for sale. All three machines are located next to each other at the same site and are identically equipped, each including a mounted 4th axis / NC rotary table on the machine table. Manufacturer: Hyundai-Kia Machine / WIA Corporation Model: VX500 / VX500 F21i-MB Machine Type: CNC Vertical Machining Center Control: FANUC Series 21i-MB Number of Machines: 3 units Year of Manufacture: 2007 & 2009 Tool Clamping: BT40 / NT40 Tool Magazine: 30-position 4th Axis: Yes, each mounted Machine Weight: approx. 7,000 - 7,500 kg per machine Technical Data per Machine Travel X-axis: 1,060 mm Travel Y-axis: 510 mm Travel Z-axis: 635 mm Table Size: 1,200 x 500 mm Max. Table Load: 800 kg Spindle Speed: 80 - 8,000 rpm Optional / possible according to documentation: up to 10,000 rpm Spindle Power: 15 / 11 kW Spindle Clamping: BT40 / NT40 Rapid Traverse X/Y: 36 m/min Rapid Traverse Z: 30 m/min Working Feed: 1 - 15,000 mm/min Smallest Input Unit: 0.001 mm Positioning Accuracy according to documentation: ±5 µm over full travel Repeatability Accuracy according to documentation: ±2 µm Tool Changer Automatic Tool Changer Tool Magazine: 30 positions Tool Call: Random Max. Tool Diameter: 90 mm Max. Tool Length: 300 mm Ijdpfozdv R Rjx Acgoau Max. Tool Weight: 8 kg Tool Change Time Tool-to-Tool: approx. 3 seconds Chip-to-Chip Time: approx. 7 seconds Equipment per Machine FANUC Series 21i-MB CNC Control 4th Axis / NC Rotary Table, mounted Automatic Tool Changer 30-position Tool Magazine BT40 / NT40 Tool Clamping Coolant System Spindle Cooling / Main Shaft Cooling Unit AR Filtrazioni Oil Mist Extractor / Filtration System Full Protective Enclosure Work Area Lighting Electronic Handwheel / MPG Load Meter Spindle Override Feed Override Feedrate Override Chip Conveyor Function on Control Panel Automatic Door Function on Control Panel Tool Holders visible in the Magazine Clamping Devices / Vise or Fixture visible in the Work Area Description The machines are suitable for general CNC milling operations, toolmaking, jig and fixture manufacturing, single-part production, small-batch production, and precise machining operations. Due to the mounted 4th axis, the machines are suitable not only for conventional 3-axis milling but also for 3+1 machining. All three machines are located next to each other and can be offered together as a package or, if necessary, individually.

Condition: like new (used), Year of construction: 2017, operating hours: 1,075 h, functionality: fully functional, travel distance X-axis: 730 mm, travel distance Y-axis: 730 mm, travel distance Z-axis: 880 mm, controller manufacturer: Fanuc, table width: 500 mm, table height: 500 mm, table load: 500 kg, rotational speed (max.): 15,000 rpm, spindle speed (max.): 15,000 rpm, coolant supply: 70 bar, Horizontal Machining Center DMG MORI Iedpjzdllwofx Acgeau NHX 5000, 2nd Generation Control: M730UM Celos X: 730mm Y: 730mm Z: 880mm Milling Spindle Interface: HSK63-A Speed: 20-15,000/min Power: 37 kW Torque: 250 Nm Pallets Number: 2 Size: 500x500 Load capacity: max. 500 kg Type: Grid pattern Tool magazine Positions: 60 Type: Rotary Coolant system: Knoll system, 70 bar Mist extractor The machine comes from a research institute and has only run for approximately 1075 spindle hours to date. Condition: as new Availability: short notice

Condition: excellent (used), Year of construction: 2017, functionality: fully functional, turning length: 500 mm, turning diameter over cross slide: 290 mm, spindle speed (max.): 5,500 rpm, spindle bore: 73 mm, travel distance X-axis: 210 mm, travel distance Y-axis: 80 mm, travel distance Z-axis: 550 mm, rapid traverse X-axis: 30 m/min, rapid traverse Y-axis: 22 m/min, rapid traverse Z-axis: 30 m/min, rotational speed (max.): 6,000 rpm, chuck outer diameter: 225 mm, swing diameter over cross slide: 290 mm, spindle nose: FL 140h5, overall weight: 4,300 kg, Equipment: documentation/manual, rotational speed infinitely variable, A complete DMG MORI CTX alpha 500 V6 model, fully equipped! This machine features a C-axis, powered tooling, Y-axis, sub-spindle, and more. We acquired this machine in working order from production, and it can be inspected in working condition by appointment. Iasdpfezc Nlaox Acgju Additional options & accessories: - Band filter system including high-pressure pump - DMG CELOS software - 3-jaw chuck (SMW Autoblok KNCS-N-225-66) on the main spindle - 3-jaw chuck (SMW Autoblok KNCS-N-170-43) on the sub-spindle - Chip conveyor - Coolant gun - Various VDI-30 tool holders (6 powered, 4 static) - Original DMG mist extraction system - All original documentation Weight & dimensions: 4,300 kg 4066x2583x1829 mm (LxWxH)

Condition: good (used), Year of construction: 1990, machine/vehicle number: 14076, Offer 26143 Technical data: Isdpfx Aozdq I Rocgoau - Maximum turning height 165 mm - Maximum turning length 750 mm - Turning diameter over bed 330 mm - Turning diameter over compound slide 170 mm - Spindle bore 42 mm - Taper of tailstock quill MK 3 - Travel of tailstock quill 140 mm - Spindle speeds 18 - 2000 rpm - Feeds longitudinal + facing - Metric thread pitches - Inch threads - Module threads - Drive 400 V / 1.5 / 2.8 kW - Including: - 2 x 3-jaw chuck - Steady rest - 4 x HSS tool holders - Various turning tools - Space requirement approx. B 1800 x H 1150 x D 900 mm - Weight approx. 800 kg

Condition: ready for operation (used), Year of construction: 2001, A Fischer CNC 5-axis multi-machining center is available. Spindle power: 7.5kW, spindle speed: 18000rpm, tool positions: 12, clamping elements: 8, working length: 7000mm, clamping stroke: 60mm, clamping range: 380mm, max. spindle tilt: 90°, stop stroke: 60mm, stop width: approx. 250mm, tool holder: HSK-40E, max. saw blade diameter: 200mm, machine dimensions X/Y/Z: approx. 8200mm/2450mm/3200mm. Documentation available. An on-site inspection is possible. Ijdszdumqspfx Acgoau

Condition: used, machine/vehicle number: 008501, Position 1: 5 Axis CNC Routers BIESSE-ROVER A - SYNCHRO Position 2: Panel Feeding and Loading BIESSE-ROVER A - SYNCHRO Iaedpfxsy Af Hue Acgju

Condition: excellent (used), functionality: fully functional, MAZAK – 5-axis machining center VARIAXIS 730/5X II (dual pallet changer) Manufacturer: Machine Type: Year of manufacture: Date of commissioning: YAMAZAKI MAZAK Variaxis 730 with dual pallet changer 12/2007 02/12/2008 FEATURES: - Drive power 30/22 kW (30 minutes/continuous operation) - Spindle speed 35-10,000 rpm - Rapid traverse rates 42 m/min - 80 tools - SK50 !!!! - Control system: MAZATROL MATRIX - Tool length measuring device 2 Iodjzda Dvjpfx Acgjau ACCESSORIES: - MAYFRAN chip conveyor "CONSEP 2000", discharge on the right - High-pressure coolant for the spindle, 70 bar - CNC options package, performance signal light - Preparation for monitoring system B

Condition: good (used), Year of construction: 1995, travel distance X-axis: 1,000 mm, travel distance Y-axis: 600 mm, travel distance Z-axis: 600 mm, x-travel 1000 mm y-travel 600 mm z-travel 600 mm Control: Heidenhain TNC 426 Spindle nose: 100–700 mm Work table: 1,080 x 580 mm Max. workpiece weight: 550 kg T-slots: 7 pcs. T-slot width: 14 mm Iodpfx Aezd Dv Iscgjau Tool magazine with 36 positions Max. tool weight: 8 kg Max. tool length: 340 mm Machine weight approx. 6.2 t Space requirement approx. 4,790 x 5,330 x 2,905 mm

Condition: good (used), Year of construction: 1999, travel distance X-axis: 2,000 mm, travel distance Y-axis: 500 mm, travel distance Z-axis: 500 mm, X travel: 2000 mm Y travel: 500 mm Z travel: 500 mm Iodpfx Aezd Dvnocgjau Control: Siemens 840 D Feed rate – fine adjustment: 1-8000 mm/min Table size: 2120 x 500 mm Table load: 2000 kp Rapid traverse X-axis: 40 m/min Rapid traverse Z-axis: 20 m/min Tool holder: HSK 63 A Spindle speeds – stepless: 0-15000 rpm Spindle drive: 20 kW Spindle bearing diameter: 70 mm Tool diameter: 63 /126 mm Tool magazine: 40 pcs Weight: 12 t Total power requirement: 65 kVA - Equipment: chip conveyor

Condition: excellent (used), Year of construction: 2007, Used CNC machining center Manufacturer: Homag Type: BOF 311/40/F/K Year of manufacture: 2007 Special features: 5-axis spindle with 15 kW "Drive 5+" (incl. vibration sensor) Workpiece thickness 300 mm incl. clamping device WoodWop 8.0 incl. Windows 7 computer 5-axis CNC cross-support machine; Cantilever table with 8 adjustable consoles, each with 2 suction cups, side and longitudinal stop bolts, LED position display for vacuum suction cups 6 sets of extraction rails, connection for Power-Clamp, vacuum connection for templates WORKPIECE PARAMETERS: – Maximum workpiece length: All units individually 4000 mm, pendulum max. 1550 (1375) mm Workpiece diameter 25 mm: individually 3475 mm, pendulum max. 1915 mm -Workpiece width: stop at the front: 1450 mm for all units / 1525 mm with workpiece diameter 25 mm Stop at the rear: up to 1600 mm / 1730 mm – Workpiece thickness: – Max. 300 mm including clamping device – Up to max. 60 mm with standard clamping device SAFETY AND PROTECTION DEVICES: EC compliant; SAFETY GUARD ON THE RIGHT WITH DOOR Left and rear: wall installation! Support equipment: 15 kW Drive5+ spindle and 30-position tool changer (chain) up to 24,000 rpm, vibration sensor Ijdpfjzdydzjx Acgjau Pick-up location for saw blade 350mm diameter Drilling head with 25 spindles (V19/H6/S0/90°) AGGREGATE INTERFACE DRIVE5+ Chip conveyor belt TOOL TRANSFER LOCATION COOLANT TANK FOR MACHINING SPINDLE VACUUM PUMP 140 M3/H Control system: POWERCONTROL PC85 with PLC CONTROL SYSTEM; WoodWop Version 8.0 WOODWOP-CAD/CAM INTERFACE STANDARD DOCUMENTATION AND CONTROL SYSTEM TEXTS: GERMAN Delivery includes only the tools and HSK tool holders shown in the pictures!

Condition: excellent (used), Year of construction: 2005, functionality: fully functional, machine/vehicle number: Serien-Nr.: 107.84.00.188,, CNC machining center, manufacturer: Mikron, type: HSM 400, year of manufacture: 2005 Serial number: 107.84.00.188, travel ranges (x/y/z-axis): 400x450x350 mm, Iedpfx Aozdtacecgeau tool holder: HKS40E, max. spindle speed: 30,000 rpm, spindle drive: 13 kW, recorded operating/load hours: 44,899/32,369 (13,350 spindle hours since replacement) CNC control system: HEIDENHAIN iTNC530 Pallet table PPC 320x320 mm, 7-position pallet changer, 68-position tool changer, 1 Cooling unit BURN, 1 extraction system KELLER L-Cut, year of manufacture: 2012, Setup probe PS 32 (WITHOUT any further accessories)

Condition: reconditioned (used), Year of construction: 2018, functionality: fully functional, CNC turning machine GILDEMEISTER CLX 350 V3 With DMG MORI SLIMline Multi Touch Fanuc I series control Year of manufacture: 2018 Turning diameter: 320 mm Travel in X: 242 mm Travel in Z: 540 mm Spindle bore: 65 mm Speed range: 20 – 5000 rpm Iajdpfx Ajzd Dlpscgju With the following accessories: Sliding safety shield with interior lighting 12-station turret with 12 driven tool stations VDI 30 C-axis, tailstock with quill Programmable tailstock via M function Tool measurement in the work area Electronic handwheel Chip conveyor 3-jaw chuck, hydraulic, Schunk ROTA THW plus 0 210 mm Foot switch for chuck adjustment Parts catcher Glass scale in the X axis Coolant system with high-pressure pump 12 bar Coolant spray gun Operating manuals

Condition: used, Year of construction: 2000, BAZ cover for Maho DMU 50 evo, year of manufacture 2000. Iaodpfx Aszdyugjcgju

Condition: ready for operation (used), Year of construction: 2011, travel distance X-axis: 760 mm, travel distance Y-axis: 640 mm, travel distance Z-axis: 760 mm, controller manufacturer: FANUC, controller model: Series 18i-MB, workpiece height (max.): 800 mm, workpiece weight (max.): 500 kg, spindle speed (max.): 6,000 rpm, number of slots in tool magazine: 120, tool length: 400 mm, tool weight: 15 g, Equipment: chip conveyor, documentation/manual, horizontal machining center with pallet changer, two pallets 500x500, 120 tool positions, probing system. Iasdpfszdqvzsx Acgeu

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE - Table dimensions : 650 x 400 [mm] - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle - Chips conveyor : DROITE Ijdpfx Ajzdvmxocgsau - Tool probe : MIDEX BKS1S

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE - Table dimensions : 650 x 400 [mm] Iaedpfx Aszdvmrscgju - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle - Chips conveyor : DROITE - Tool probe : MIDEX BKS1S

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE - Table dimensions : 650 x 400 [mm] - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle - Chips conveyor : DROITE - Tool probe : MIDEX BKS1S Iasdezdvmlepfx Acgju

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE - Table dimensions : 650 x 400 [mm] Iodpfx Acjzdvmfsgjau - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle - Chips conveyor : GAUCHE - Tool probe : MIDEX BKS1S

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER Iajdpfx Acezdvl Uogeu - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE - Table dimensions : 650 x 400 [mm] - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle - Chips conveyor : DROITE - Tool probe : MIDEX BKS1S

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE - Table dimensions : 650 x 400 [mm] - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle Isdpfxozdvl Ie Acgsau - Chips conveyor : DROITE - Tool probe : MIDEX BKS1S

Condition: used, TECHNICAL DETAILS - Number of axes : 3 MILLING SPINDLE - Tool holder type : BBT 30 (Big-Plus) - Spindle power : 12 [kW] - Spindle speeds : 10000 [rpm] LINEAR AXES - Travels on X/Y/Z axes : 500/400/330 [mm] - Rapid traverses rates (X/Y/Z) : 54 [m/min] TOOL CHANGER - Auto. Tool Changer type : Parapluie - Tool magazine capacity : 21 TABLE Iaedpfx Acexcbulsgsu - Table dimensions : 650 x 400 [mm] - Maximum weight upon table : 300 [kg] - Distance table / spindle nose (min./max.) : 250-580 [mm] POWER SUPPLY - Supply voltage : 380 [V] WEIGHT & DIMENSIONS - Machine floor space : 1565 X 2027 [mm] - Machine height : 2346 [mm] - Machine weight : 2000 [kg] EQUIPMENT - CNC : Fanuc 31i model B5 - Rigid tapping - 3 colors status lamp - Coolant tank * with high-pressure pump : 15 [bars] - Coolant through spindle - Chips conveyor : Gauche - Tool probe : BLUM Z NANO

Condition: used, Vertical machining center Iasdpfxsy Rt Hxo Acgeu Please refer to the attached images to get an impression of the machine. I am an injection molding specialist and have no professional experience in the field of machine tools. The machine ran perfectly and without any apparent defects when it was picked up. The machine is located in Augsburg at the company fimatech. An inspection is, of course, possible! We urgently need the space, which is why we have halved the price!!!

Condition: good (used), Year of construction: 2005, operating hours: 35,278 h, functionality: fully functional, travel distance X-axis: 1,000 mm, travel distance Y-axis: 800 mm, travel distance Z-axis: 810 mm, rapid traverse X-axis: 30,000 m/min, rapid traverse Y-axis: 30,000 m/min, rapid traverse Z-axis: 30,000 m/min, workpiece length (max.): 1,000 mm, workpiece width (max.): 800 mm, workpiece height (max.): 700 mm, workpiece weight (max.): 1,200 kg, rotational speed (min.): 50 rpm, rotational speed (max.): 5,000 rpm, operating hours of spindle: 34,000 h, distance table to spindle center: 200 mm, distance table center to spindle nose: 1,010 mm, number of spindles: 1, number of slots in tool magazine: 40, Equipment: documentation/manual, The OKUMA MX-60HB is a high-rigidity, horizontal CNC machining center designed for medium to high-precision production work. It belongs to Okuma’s renowned MX series, characterized by its robustness, reliability, and ability to machine complex parts on multiple faces using an interchangeable pallet system. Iodpfxozdqbde Acgoau DOES NOT INCLUDE THE TOOL STORAGE CONES.

Condition: used, Year of construction: 2007, turning diameter 65 mm turning length 150 mm control Siemens 840D spindle passage 75 mm turning length 150 mm c-axis 2x 0,001 ° gripping station 65 mm speeds 5000 U/min rapid traverse 30 m/min turret (x-stations) 3x12 Number of axles 10 St. number of toolholder-holes 36 chip conveyor ja / yes kW Iaodpfx Acjzdk Evogeu coolant filtering unit ja / yes kW total power requirement 22 kW weight of the machine ca. 9 t dimensions of the machine ca. 4,4 x 2 x 2,3 + Iemca m DMG Sprint 64 Linear CNC lathe, built in 2007, 10 axes, 2 spindles, 3 turrets with Iemca Master 880 loading magazine Accessories: a large number of tool holders