Used Horizontal Lathes Victor Vturn-26 for sale (17,142)

Condition: used, total width: 1,700 mm, total length: 3,800 mm, total height: 2,000 mm, Empty weight: 6.000 kg CNC Internal grinder, converted from a CNC lathe - Documentation available: Yes - CE certificate present: No - Serial number: UC-1871 - Drive system: CNC - Control system brand: Fanuc - Control system type: 0-T - Power [kW]: 15.0 - Centre height [mm]: 115 - Swing over bed [mm]: 380 - Distance between centres [mm]: 635 - Spindle bore [mm]: 75 - Max. spindle speed [rpm]: 3500 - Options: Removable bed Lsdpfsw A I Uhjx Amnsrl - Swing over removable bed [mm]: 520 - Transport dimensions: 3800mm x 1700mm x 2000mm (l x w x h) - Transport weight [kg]: 6000kg - Transport packages [pcs.]: 2 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Year of construction: 2006, Victor V26-II CNC lathe; with C-axis; with driven tools; FANUC 21i-TB control; chuck: 10"; turning diameter: 520 mm; turning length: 1090 mm; spindle speed: 3,500 rpm; upper turret toolholder with 12 positions, 6 of which are driven; tool presetting device; chip conveyor; oil mist extraction. Lrsdpjr E Amgsfx Amnjl

Condition: used, Year of construction: 2011, turning diameter over cross slide: 75 mm, turning diameter: 381 mm, spindle speed (max.): 3,500 rpm, spindle bore: 75 mm, travel distance Z-axis: 850 mm, total height: 2,325 mm, total length: 4,820 mm, total width: 2,100 mm, overall weight: 8,000 kg, CNC Lathe with Y-axis, driven tools and 2nd Spindle CNC Control Fanuc series 18i-TB Turning diameter 381 mm Spindle bore diameter 75 mm Spindle speed 3500 R/min Spindle motor 22/15 Kw Movement X-axis 190 + 69,5 mm Movement Y-axis +55 / -55 mm Movement Z-axis 850 mm Movement W-axis (subspindle to mainspindle) 830 mm Min indexing C-axis main spindle 0,001 ° Number of tools on turret 12x Number of driven tools 12 x Tool Taper VDI 40 Bar feeder Irco-Breuning ILS MUK Lredpfxoy N A Hxe Amnel Spindle motor driven tools 4000 R/min If you have any questions concerning the machine, please do not hesitate to contact us by phone or e-mail. Feel free to view our other advertisements for a complete overview of our stock.

Condition: used, Year of construction: 2001, turning diameter 550 mm Lrjdpfxox Sr Eie Amnel turning length 900 mm control Fanuc O-TC weight of the machine ca. 8165 kg

Condition: used, Year of construction: 1996, Victor Vturn-20 CNC turning centre, 10 station tool holder, Fanuc Series 0-T CNC, swarf conveyor, fitted air bench, with Hydrafeed Multifeed MLI bar feeder, serial no. 2766 (1996) Ledpfx Amsyhw U Denorl

Year of construction: 2014, operating hours: 8,674 h, condition: ready for operation (used), - USED- 2-AXIS CNC LATHE DISTANCE BETWEEN CENTRES: 1750 mm MAX ROTATING DIAMETER: 820 mm MAX TURNING DIAMETER: 730 mm BAR CAPACITY: 115 mm SPINDLE: 1500 rpm; 30 - 37 kW; ASA 2-11 ; 510 mm X-AXIS TRAVEL: 365+25 mm Lsdpsq H Tr Tsfx Amnerl Z-AXIS TRAVEL: 1650 mm GEAR BOX: 4-STEPS RAPID FEEDS X-Z: 15 - 12 m/min TURRET HEAD: 10 POS CONTROL UNIT: FANUC 0i-TD WEIGHT: 12800 Kg OVERALL DIMENSIONS: 6200 x 2500 x 2500 mm ACCESSORIES: ROTATING TAILSTOCK ; SWARF CONVEYOR ; ETHERNET PORT ; PCMCIA SERIAL PORT ; RS 232 SERIAL PORT ; USB PORT

Condition: ready for operation (used), Year of construction: 2019, spindle speed (max.): 4,200 rpm, controller manufacturer: FANUC, controller model: 0i-TF, number of axes: 2, Horizontal turning machine manufactured in 2019. This Victor Vturn-NP20 was moderately used, with only 3,000 real operating hours, and is in very good technical condition. It features a standard turning diameter of 206 mm and a bar capacity of 52 mm, making it suitable for machining small and medium-sized parts. Consider the opportunity to buy this Victor Vturn-NP20 horizontal turning machine. Contact us for further details. • Compact CNC lathe suitable for small/medium parts, serial production, and bar machining • Configuration: 2 axes (X, Z) • Standard turning diameter: 206 mm • Bar capacity: 52 mm • Distance between centers: 520 mm • Turret: 12 stations, 25 mm tool shank • Operating hours: 3,000 (verifiable from CNC menu) • Condition: Moderately used, very good technical condition, properly maintained • Ready for immediate production; no additional investment required • Can be tested at the seller’s workshop Additional equipment Lrodpjyhcqaefx Amnsl • Chip conveyor • Chip trolley

Condition: ready for operation (used), Year of construction: 1997, operating hours: 1,601 h, spindle speed (max.): 4,200 rpm, travel distance X-axis: 135 mm, travel distance Z-axis: 600 mm, total height: 1,650 mm, total width: 1,500 mm, overall weight: 3,300 kg, controller manufacturer: FANUC, controller model: Series O-T, product length (max.): 3,290 mm, number of slots in tool magazine: 10, number of axes: 2, Horizontal turning machine manufactured in 1997. This Victor Vturn-20 features a maximum longitudinal travel of 600 mm and a standard turning diameter of 200 mm. It includes a turret with 10 tool positions and a spindle speed range of 42-4200 RPM. If you are looking to get high-quality turning capabilities, consider the Victor Vturn-20 machine we have for sale. Contact us for further details. • Swing over bed/front cover: 450 mm • Standard turning diameter: 200 mm • Swing over carriage: 300 mm • Rapid feed: X 12 m/min, Z 15 m/min • Spindle nose: A2-6 • Hole through spindle: 62 mm • Spindle bearing diameter: 100 mm • Spindle inside taper: 1/20 • Turret tool positions: 10 • Standard O.D. tool size: 20 mm • I.D. tool size (max): 32 mm • Tailstock quill diameter: 75 mm • Tailstock quill stroke: 80 mm • Tailstock quill taper (built-in): MT4 • Center distance: 635 mm • Spindle motor (continuous/30 min): AC 10 HP / 12 HP • Feed motor: X 1.4 HP, Z 2.8 HP • Coolant capacity: 87 L Additional equipment Lredpfx Amjyrfp Tjnsl • Hydraulic power chuck: 200 mm (8") • Hole through power chuck tube: 50 mm Technical Specification Counter Spindle No Driven Tools No

Condition: good (used), Year of construction: 2014, functionality: fully functional, machine/vehicle number: HX1-1127, turning length: 1,123 mm, turning diameter: 540 mm, spindle speed (max.): 4,200 rpm, feed length X-axis: 600 mm, feed length Y-axis: 120 mm, feed length Z-axis: 1,100 mm, bar diameter (max.): 52 mm, TECHNICAL DETAILS Swing diameter over bed: 960 mm Swing diameter over carriage: 610 mm Distance between centers: 1,123 mm Turning length: 1,000 mm Turning diameter: 540 mm Travel paths X-axis: 600 mm Z-axis: 1,100 mm Y-axis: 120 mm (+60 mm ~ -60 mm) B-axis: 225 mm (+110 mm ~ -115 mm) C-axis: 0.001° indexable Axis feed Feed speed X-/Z-/Y-axis: 36 / 36 / 18 m/min Lrsdpswnpdbefx Amnol Motor power X-/Z-/Y-/B-axis: 5.5 / 7 / 4 / 3 kW Spindle Spindle mount: A2-6 (8") Spindle speed: 4,200 rpm Spindle motor power: 15 / 22 kW Spindle bore: 62 mm Bar capacity: 52 mm Bearing replacement diameter: 100 mm Upper tool spindle (B-axis milling head) Turret head: Milling head with ATC Indexing accuracy (positioning): 5° (coupling) Indexing accuracy (continuous): 0.001° (roller gear) Speed: 12,000 rpm Milling spindle motor power: 5 / 7.5 kW Tool changer and magazine Tool holder: HSK-A63 Tool places: 40 Tool selection: Fixed tool position Tool diameter: 90 mm Tool length: 280 mm Tool weight: 7 kg Tool change time: 1.8 s MACHINE DETAILS Control: Fanuc Series 31i Model A Tank volume: 560 l Connected load: 85 kVA Floor space (L × W × H): 5,500 x 3,400 x 2,600 mm Machine weight: 12,000 kg EQUIPMENT - High-speed machining with 600-block look-ahead - Air nozzle above chuck - Renishaw tool presetting device - Programmable tailstock - 8" Kitagawa chuck - Chip conveyor with timer (crawler belt) - Internal cooling 20 bar with filter unit - Oil separator - Tool monitoring

Condition: good (used), VICTOR VTURN-46 CNC HEAVY DUTY SLANT BED LATHE WITH FANUC SERIES O-T CONTROL UKUK 4 Jaw Ø505mm Chuck. Maximum Turning Ø730mm. Standard Turning Ø520mm. Distance Between Centres 1,750mm. Axis Travel 'X'=365mm, 'Z'=1,650mm. Rapid Traverse 'X'=15m/min, 'Z'=12m/min. Spindle Speed 1,500rpm (30kW Motor). 10 Station Turret. S/No. MB-1193. DESCRIPTION With Coolant System, Chip Conveyor, Filtermist F21/8 Mist Extraction Unit, Tool Setting Arm, 3 Jaw Ø445mm Hydraulic Chuck, Tailstock, 2 Steadies, Foot Switches, Signal Tower, Large Quantity Of Jaws, Tool Blocks & Boring Bar Sleeves. Overall Dimensions L6,200 x W2,500 x H2,500mm. Weight 12,800kg. Lredex Naqnspfx Amnol

Condition: ready for operation (used), Year of construction: 1997, functionality: fully functional, machine/vehicle number: 270, center width: 900 mm, center height: 210 mm, spindle speed (max.): 3,000 rpm, Equipment: CE marking, TECHNICAL DETAILS Swing diameter over bed: 420 mm Centre height: 210 mm Centre distance: 900 mm Spindle bore: 55 mm Spindle speed: 4 - 3,000 rpm MACHINE DETAILS Control type: Teach-in Control system: CNC Ljdpey Rx A Sofx Amnorl EQUIPMENT Digital readout (Weiler) Documentation available CE marking

Condition: ready for operation (used), Year of construction: 1979, functionality: fully functional, spindle speed (max.): 450 rpm, workpiece weight (max.): 5,000 kg, working width: 2,000 mm, spindle diameter: 105 mm, TECHNICAL DETAILS Swing diameter over bed: 1,050 mm Working width: 2,000 mm Working depth: 1,050 mm Max. workpiece weight: 5,000 kg Spindle diameter: 105 mm Spindle bore: 105 mm Spindle speed: 2.24–450 rpm Thickness: 105 mm Distance between centers: 2,000 mm Max. workpiece weight: 5,000 kg MACHINE DETAILS Motor power: 22 kW Dimensions & Weight Ljdpfxsy Rxrts Amnerl Dimensions (L x W x H): 4,900 mm x 1,900 mm x 1,700 mm Weight: 8,000 kg Control: Conventional EQUIPMENT Four-jaw chuck Steady rest

Condition: used, total length: 10,560 mm, total width: 1,710 mm, total height: 1,400 mm, Empty weight: 9.000 kg Price: On request - Documentation available: No - CE certificate present: No - Drive system: Conventional - Power [kW]: 22.0 - Centre height [mm]: 315 - Swing over bed [mm]: 630 - Carriage turning diameter [mm]: 360 - Distance between centres [mm]: 6000 - Bed width [mm]: 700 Lsdpfx Ajyg Hi Romnorl - Spindle bore [mm]: 62 - Min. spindle speed [rpm]: 8 - Max. spindle speed [rpm]: 1180 - Options: Digital readout - Type of digital readout: Sony - Transport dimensions: 10560mm x 1710mm x 1400mm (l x w x h) - Transport weight [kg]: 9000kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Year of construction: 1999, total height: 2,000 mm, total length: 3,000 mm, total width: 1,800 mm, Empty weight: 4.000 kg Price: On request Driven tools included Barfeeder included - Year: 1999 - Documentation available: Yes - CE marking present: Yes - CE certificate present: No - Serial number: HT23372E - Drive system: CNC - Power [kW]: 15.0 - Centre height [mm]: 230 - Swing over bed [mm]: 450 - Distance between centres [mm]: 380 - Spindle bore [mm]: 59 - Min. spindle speed [rpm]: 30 - Max. spindle speed [rpm]: 5000 - Options: Bar feeder, Live tools Ledpfx Ajwqf I Usmnorl - Transport dimensions: 3000mm x 1800mm x 2000mm (l x w x h) - Transport weight [kg]: 4000kg - Transport packages [pcs.]: 4 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Year of construction: 1999, total height: 1,800 mm, total length: 2,200 mm, total width: 1,600 mm, Empty weight: 2.150 kg Price: On request - Year: 1999 - Documentation available: Yes - CE marking present: Yes - CE certificate present: No - Serial number: 39 - Drive system: Teach-in - Power [kW]: 7.5 - Centre height [mm]: 160 - Swing over bed [mm]: 320 Ljdpfxjwfpako Amnorl - Distance between centres [mm]: 800 - Spindle bore [mm]: 50 - Max. spindle speed [rpm]: 4000 - Transport dimensions: 2200mm x 1600mm x 1800mm (l x w x h) - Transport weight [kg]: 2150kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, total length: 4,500 mm, total width: 1,600 mm, total height: 1,500 mm, Colour: Grey Empty weight: 5.000 kg Price: On request - Documentation available: No - CE certificate present: No - Serial number: 0440922 - Drive system: Conventional - Power [kW]: 18.5 - Centre height [mm]: 315 - Swing over bed [mm]: 630 - Carriage turning diameter [mm]: 400 - Distance between centres [mm]: 3000 - Bed width [mm]: 580 - Spindle bore [mm]: 82 - Min. spindle speed [rpm]: 9 - Max. spindle speed [rpm]: 1120 - Options: Three-jaw chuck, Four-jaw chuck - Transport dimensions: 4500mm x 1600mm x 1500mm (l x w x h) - Transport weight [kg]: 5000kg Lrsdpsx Ryv Tjfx Amnjl - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, total length: 3,350 mm, total width: 1,100 mm, total height: 1,500 mm, Colour: Blue Empty weight: 2.200 kg - Documentation available: No - CE certificate present: No - Drive system: Conventional - Centre height [mm]: 240 Ledpfoy Nk N Uox Amnorl - Swing over bed [mm]: 480 - Carriage turning diameter [mm]: 260 - Distance between centres [mm]: 1500 - Bed width [mm]: 370 - Spindle bore [mm]: 65 - Min. spindle speed [rpm]: 18 - Max. spindle speed [rpm]: 900 - Options: Removable bed, Quick-change tool post, Three-jaw chuck - Swing over removable bed [mm]: 740 - Transport dimensions: 3350mm x 1100mm x 1500mm (l x w x h) - Transport weight [kg]: 2200kg - Transport packages [pcs.]: 1 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Year of construction: 1999, total length: 3,350 mm, total width: 1,550 mm, total height: 1,800 mm, Colour: White Empty weight: 3.300 kg In very good condition. In 2017 Refurbished for €32.000 - Year: 1999 - Documentation available: Yes - CE marking present: Yes - CE certificate present: No - Drive system: Teach-in - Control system brand: Monforts - Control system type: Monforts Control System MTC K - Power [kW]: 15.0 - Centre height [mm]: 250 - Swing over bed [mm]: 500 - Carriage turning diameter [mm]: 290 - Distance between centres [mm]: 1500 - Spindle bore [mm]: 70 - Min. spindle speed [rpm]: 2 - Max. spindle speed [rpm]: 2800 - Options: Fixed steady, Three-jaw chuck - Transport dimensions: 3350mm x 1550mm x 1800mm (l x w x h) - Transport weight [kg]: 3300kg - Transport packages [pcs.]: 1 Lodpfey Ivx Eex Amnsrl Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Year of construction: 1959, total length: 3,500 mm, total width: 1,200 mm, total height: 1,500 mm, Colour: Green Empty weight: 2.000 kg - Year: 1959 - Documentation available: No - CE certificate present: No - Serial number: 37 - Drive system: Conventional - Centre height [mm]: 270 - Swing over bed [mm]: 540 - Carriage turning diameter [mm]: 360 - Distance between centres [mm]: 1500 - Bed width [mm]: 450 - Spindle bore [mm]: 62 - Min. spindle speed [rpm]: 14 - Max. spindle speed [rpm]: 710 - Options: Fixed steady, Three-jaw chuck - Transport dimensions: 3500mm x 1200mm x 1500mm (l x w x h) - Transport weight [kg]: 2000kg Lrsdey Idtwopfx Amnol Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, total length: 6,400 mm, total width: 1,100 mm, total height: 1,400 mm, Colour: Grey Empty weight: 4.000 kg - Documentation available: Yes - CE certificate present: No - Drive system: Conventional - Power [kW]: 5.7 - Centre height [mm]: 300 - Swing over bed [mm]: 600 - Carriage turning diameter [mm]: 320 - Distance between centres [mm]: 4000 - Bed width [mm]: 400 - Spindle bore [mm]: 80 - Min. spindle speed [rpm]: 9 - Max. spindle speed [rpm]: 630 - Options: Three-jaw chuck, Fixed steady - Transport dimensions: 6400mm x 1100mm x 1400mm (l x w x h) - Transport weight [kg]: 4000kg - Transport packages [pcs.]: 4 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lodoy Auzujpfx Amnjrl Lukas van Rossum

Condition: used, Year of construction: 1998, total length: 2,600 mm, total width: 1,500 mm, total height: 2,100 mm, Empty weight: 1.500 kg - Year: 1998 - Documentation available: Yes - CE marking present: Yes - CE certificate present: No - Serial number: P30162 - Drive system: Teach-in - Control system brand: Fanuc - Power [kW]: 7.5 - Centre height [mm]: 200 - Swing over bed [mm]: 400 - Carriage turning diameter [mm]: 245 - Distance between centres [mm]: 1250 - Bed width [mm]: 320 - Spindle bore [mm]: 55 - Min. spindle speed [rpm]: 15 - Max. spindle speed [rpm]: 2500 - Options: Three-jaw chuck, Removable bed Lrjdex Ad Uzopfx Amnol - Swing over removable bed [mm]: 585 - Transport dimensions: 2600mm x 1500mm x 2100mm (l x w x h) - Transport weight [kg]: 1500kg - Transport packages [pcs.]: 2 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, operating hours: 11,562 h, total height: 1,900 mm, total length: 5,600 mm, total width: 2,000 mm, Empty weight: 8.500 kg Price: On request - Documentation available: No - CE certificate present: No - Operating hours: 11562 - Drive system: Conventional - Power [kW]: 30.0 - Centre height [mm]: 500 - Swing over bed [mm]: 1000 - Distance between centres [mm]: 3000 - Spindle bore [mm]: 105 - Min. spindle speed [rpm]: 2.24 - Max. spindle speed [rpm]: 450 - Transport dimensions: 5600mm x 2000mm x 1900mm (l x w x h) Lrsdpfx Aswp H Efemnjl - Transport weight [kg]: 8500kg Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, total height: 1,700 mm, total length: 6,000 mm, total width: 1,700 mm, Empty weight: 6.500 kg Price: On request Lathe metal lathe Model: Conventional Manufacturer: TOS Type: SUI 63 Serial number: 407620860 Center distance: 4000mm Center height: 325mm Lrodpswnhy Iefx Amnel Turning diameter: 630mm Spindle passage: 80mm Spindle speed: 11,2-1800 rpm Machine-afmeting: 6000x1700x1700mm Machine weight: 6500kg - Documentation available: No - CE certificate present: No - Drive system: Conventional - Centre height [mm]: 325 - Swing over bed [mm]: 630 - Distance between centres [mm]: 4000 - Spindle bore [mm]: 80 - Min. spindle speed [rpm]: 11.2 - Max. spindle speed [rpm]: 1800 - Transport dimensions: 6000mm x 1700mm x 1700mm (l x w x h) - Transport weight [kg]: 6500kg Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, total length: 6,800 mm, total width: 2,200 mm, total height: 2,000 mm, Empty weight: 11.000 kg Price: On request - Documentation available: Yes - CE certificate present: No - Drive system: Conventional - Centre height [mm]: 630 - Swing over bed [mm]: 1300 - Carriage turning diameter [mm]: 1000 - Distance between centres [mm]: 4000 - Bed width [mm]: 700 - Spindle bore [mm]: 120 - Min. spindle speed [rpm]: 2.8 - Max. spindle speed [rpm]: 400 - Options: Three-jaw chuck, Four-jaw chuck, Removable bed, Quick-change tool post, Fixed steady, Travelling steady - Swing over removable bed [mm]: 1700 - Transport dimensions: 6800mm x 2200mm x 2000mm (l x w x h) - Transport weight [kg]: 11000kg - Transport packages [pcs.]: 2 Financial information VAT: The price shown is exclusive of VAT Ljdpfsx Iriaox Amnerl VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum

Condition: used, Year of construction: 2006, total height: 1,750 mm, total length: 2,790 mm, total width: 1,570 mm, Empty weight: 4.300 kg Price: On request - Year: 2006 - Documentation available: Yes - CE certificate present: No - Serial number: GN08201038G - Drive system: CNC - Control system brand: Fanuc - Control system type: 0i-Mate TO - Power [kW]: 15.0 - Swing over bed [mm]: 250 - Distance between centres [mm]: 460 - Spindle bore [mm]: 62 - Max. spindle speed [rpm]: 4500 Lrsdpswfpaqefx Amnol - Options: Removable bed - Swing over removable bed [mm]: 460 - Transport dimensions: 2790mm x 1570mm x 1750mm (l x w x h) - Transport weight [kg]: 4300kg - Transport packages [pcs.]: 2 Financial information VAT: The price shown is exclusive of VAT VAT/margin: VAT deductible for entrepreneurs Delivery and trade-in always possible for everything in the industrial sectors Lukas van Rossum