Used Gleason- Pfauter Gear Hobbing Machine - Vertical for sale (70,692)

Condition: defective spare-parts repository (used), functionality: not functional, workpiece diameter (max.): 400 mm, According to the electrician, the main motor needs to be rewound. The carbon brushes should be replaced, and two coils in the control cabinet need to be replaced as well. Rcodpfxozp R Tko Ahcof Up until the motor failure, the machine was fully operational.

Condition: used, Year of construction: 2000, Technical details: max. wheel diameter: 180 mm gear width: * mm max. module: 4 total power requirement: 14 kW weight of the machine ca.: 8 t slide travel axial ( Z-axis ): 300 mm work piece - max.: 490-640 mm Rcedeyk Ur Uepfx Ahcof

Condition: used, Technical details: center height over bed: 260 mm workpiece dia. over bed: 500 mm workpiece dia. over support: 250 mm hobbing length: 2000 mm number of teeth: 2 - 50 feed:: 0,023 - 5,17 / mm/min Rcjdpfsv U T Dyjx Ahcsf module max. : 8 / 12 spindle bore diameter: 102 mm workpiece rpm : 18 - 224 U/min tailstock quill adjustment: 100 mm total power requirement: 9,5 kW weight of the machine ca.: 5,2 t dimension machine xH: 3,6 x 2,1 x 2,0 m

Condition: used, Year of construction: 2004, Technical details: max. wheel diameter: 200 mm gear width: 60 mm max. module: 7 weight of the machine ca.: 15 t Rcjdpfx Ahoxc E H Sscjf table diameter: 180 mm table turning speeds: 100 U/min hob turning speeds: 750 U/min Machine in good condition, without feed, without automation Available 24.08.2024 *

Condition: excellent (used), Year of construction: 2002, max. wheel diameter 350 mm Rcsdpfx Ahoy D T Upecjf gear width 230 mm max. module 8 min. module 1 Control Siemens 840 weight of the machine ca. 10,5 t dimensions of the machine ca. 4,5 x 2,5 x 3,0 m Loading unit, very good condition.

Condition: ready for operation (used), Year of construction: 2000, functionality: fully functional, gear diameter: 180 mm, travel distance Z-axis: 300 mm, shaft length: 640 mm, TECHNICAL DETAILS Wheel diameter - max.: 180 mm Module - max.: 4 Carriage travel axial (Z-axis): 300 mm Shaft length - max.: 490-640 mm Y-axis travel: 33 - 193 mm Redpfsw T R Abjx Ahcecf MACHINE DETAILS Total power requirement: 14 kW Machine weight: 8 t Workpiece counter: 886,067 pieces

Condition: used, TECHNICAL DETAILS - Maximum workpiece diameter : 80 [mm] - Z-axis travel : 220 [mm] - Max module : 2.5 Rcsdpoyuzgaefx Ahcef - Max workpiece-holding spindle speed : 3000 [rpm] - Max dimensions of the hob (diameter x length) : 118 X 120 [mm] - Speed of the hob-holding spindle : 200-5000 [rpm] - Shifting travel : 140 [mm] - Angular travel of hob-holding headstock : -45/+115 [°] - Machine floor space : 2700/2180 [mm] - Machine height : 2310 [mm] - Machine weight : 4800 [kg] EQUIPMENT - CNC : Siemens 840D PowerLine - Loading manipulator

Condition: good (used), max. wheel diameter 600 mm max. module 6 range L-W-H 2540 x 1500 x 1920 mm table diameter 160 mm weight of the machine ca. 3,6 t High-performance gear hobbing machine Tooth helix angle 15° Tooth width 270 mm Wheel diameter 620 mm Tooth helix angle 30° Tooth width 250 mm Wheel diameter 610 mm Tooth helix angle 45° Rcsdpjy E Twgsfx Ahcjf Tooth width 200 mm Wheel diameter 500 mm Tooth angle 60° Tooth width 100 mm Wheel diameter 450 mm Maximum cutter diameter 105 mm Maximum cutter width 115 mm Clamping table diameter 420 mm Bore of clamping table 75 mm Depth of bore below table surface — mm Diameter of workpiece clamping wheel 450 mm of clamping mandrel 30 mm of milling mandrels 22–27–32 mm

Condition: used, Year of construction: 2008, Maximum workpiece outer diameter 3420 mm Minimum workpiece inner diameter 630 mm max. module 30 mm control Siemens Sinumerik 840 D Workpiece tooth width - max. 600 mm tip circle diameter 440 mm Milling arbour diameter 80 mm x-travel 1110 mm y-travel 1300 mm spindle turning speed - stepless 18 - 180 U/min rotary table speeds infinitely variable 0 - 6 U/min Ring stength 500 mm total connected load 100 kVA weight of the machine ca. 38 t dimensions of the machine ca. 8,41 x 9,05 x 5,19 m Feed rate: - X-axis 1 to 3000 mm/min - Z-axis 1 to 4000 mm/min Rodoztz Rujpfx Ahcocf Spindle speeds in 1/min - Tool 18 to 180 - Workpiece table 0 to 6 Equipment/accessories: - IFK2 internal milling head - Milling arbor with spacer discs - Chip conveyor - Oil mist extraction - Dry machining only - Technical documentation

Condition: excellent (used), functionality: fully functional, I would be happy to add technical data to the document for you. Gear Hobbing Machine conventional Country of origin: Germany Technical specifications Details max. wheel diameter 500 mm gear width 250 mm max. module 5 total power requirement 2.2 kW weight of the machine approx. 1920 kg dimensions of the machine approx. 2500 x 1600 x 1900 mm cutter diameter max. 250 - 285 mm clamping table diameter 460 mm table hole 70 mm accessories: Rodozc Tkyopfx Ahcocf various Control unit conventional Additional information Documents I would be happy to add technical data to the document for you. I would be happy to add technical data to the document for you. Gear Hobbing Machine WMW MODULE ZFWZ 500 x 5 conventional Country of origin: Germany Technical specifications Details max. wheel diameter 500 mm gear width 250 mm max. modules 5 total power requirement 2.2 kW weight of the machine approx. 1920 kg dimensions of the machine approx. 2500 x 1600 x 1900 mm cutter diameter max. 250 - 285 mm clamping table diameter 460 mm table hole 70 mm accessories: various Control unit conventional Additional information

Condition: used, Year of construction: 2001, Technical details: Rcodexrwpkopfx Ahcsf max. wheel diameter: 80/120 mm max. module: 2,5 max. top circle diameter: 65 mm : 22 mm : 140 mm : 120 mm slide travel axial ( Z-axis ): 320/400 mm Dimensions (L/W/H): 3270 x 3240 x 2020 mm weight of the machine ca.: 6 t P60 - The compact all-rounder for wheels, shafts and worms The P60 is the smallest machine in the Gleason line of horizontal hobbing machines. The all-rounder not only mills spur gears with all rollable profiles, but is also the optimal solution for machining steering pinions and worms. with automatic loading system, extraction unit, chip conveyor, with balancing device with 2 tailstocks, with Artec process monitoring system, type CTM-BT1.1 *

Condition: excellent (used), Year of construction: 1972, functionality: fully functional, For sale: this gear hobbing machine. It is connected and can be tested. Comes with numerous accessories. Rsdpfxjxwlthe Ahcjcf Technical specifications: Max. gear diameter: 7100 mm Gear width: 1500 mm Max. module: 45 Table diameter: 4000 mm Hob diameter x width: 400 x 500 mm Max. helix angle: 45 degrees Cutter diameter: 500 mm Cutter speed: 9–63 rpm Total power consumption: 47 hp Machine weight: 160,000 kg The machine has hydraulic workpiece balancing. A video of the machine can be sent via WhatsApp.

Condition: good (used), Year of construction: 1998, Max. Pitch circle diameter External gearing 300 mm Max. Pitch circle diameter internal gearing 300 mm Max. Outer diameter of workpiece (equipment) 450 mm max. module 6 gear hobbing width -max. 100 mm Max. Helix angle (with tool Ø 125 mm) +/- 45 ° strokes - infinitely variable 130 - 1300 Hub/min workpiece weight 1000 kg Minimum distance table top - tool spindle -55 / +300 mm Maximum distance table top - tool spindle 200 mm Maximum distance table top - tool spindle 350 mm Manual Upright side shift +/- 25 mm Manual swivelling angle of the tool spindle +/- 0,5 ° Max. Tool speed 15 UpM Max. Workpiece speed 27 UpM Max. Tool diameter 7 Zoll voltage 400 V frequency 50 Hz Max. Line power 70 A total power requirement 48 kW weight of the machine ca. 11 t dimensions of the machine ca. 4,27 x 3,11 x 2,87 m table hole 40 mm taper in main spindle SK 45 control Siemens Sinumerik 840 C Gleason PFAUTER gear shaping machine Mod. PSA 300 The CNC modular gear shaping machine with skiving cutter for the machining of external and internal cylindrical gears, with straight or helical involute with straight or helical involute toothing, as well as any other profile splitting process. The work cycle is controlled by a CNC unit, with specific software for machining the gears, machining. Rjdpfx Ahsvu E Nujcocf Field of application --> The PSA 300 has been designed for the production of: - Gears with straight external teeth - Gears with straight internal teeth - Gears with external helical teeth - Gears with internal helical teeth

Condition: excellent (used), Year of construction: 2008, Siemens Sinumerik 840 D, 5 axes controlled. Rcsdpfx Aoza Egbehcef Wheel diameter max 2000 mm 700 mm wheel width Machine weight 35,000 kg Space requirements approx. 6.9 x 8.4 x 3.7 m

Condition: ready for operation (used), Year of construction: 2007, functionality: fully functional, machine/vehicle number: 17405, travel distance X-axis: 550 mm, travel distance Y-axis: 410 mm, travel distance Z-axis: 450 mm, workpiece weight (max.): 10,000 kg, spindle speed (max.): 15,000 rpm, number of slots in tool magazine: 240, No minimum price – guaranteed sale to the highest bidder! Bidding obligates the winner to pick up the machine between September 21st and October 1st! TECHNICAL DETAILS Travel range, X-axis: 550 mm Travel range, Y-axis: 410 mm Travel range, Z-axis: 450 mm Travel range, B-axis: -110 to +110° Travel range, C-axis: 360° Distance from pallet surface to spindle center: -20 to 430 mm Distance from B-axis center to spindle center: -40 to 410 mm Distance from B-axis center to spindle center: -20 mm Distance from pallet center to Z zero point: 265 mm Distance from pallet center to Y zero point: 180 mm Pallet Work area on the pallet: Ø 130 mm Pallet load capacity: 40 kg Max. workpiece size: Ø 250 × 250 mm Pallet mounting surface: 4 × M12 × 1.75 Distance from pallet bottom to pallet surface: 970 mm Pallet indexing, B/C-axis: 0.001° / 0.001° Pallet change time, B-axis: 1.2 s/90° Pallet change time, C-axis: 0.9 s/90° Pallet change time, C-axis: 1.2 s/180° Pallet change time, C-axis: 1.4 s/270° Pallet torque, B-axis: 1,070 Nm Pallet torque, C-axis: 192 Nm Pallet braking torque, B-axis: 1,112 Nm Pallet braking torque, C-axis: 500 Nm Spindle Spindle speed: 50 to 15,000 rpm Spindle speed change: 5-digit direct S-command Tool interface: SK 40 Spindle taper: 7/24, Taper No. 40 Spindle bearing inner diameter: 70 mm Max. spindle torque: 65.1 Nm at 1,100 min⁻¹ Spindle air blow: Standard Spindle orientation: Standard Tool clamping force: 7.0 kN Tool Changer Tool magazine capacity: 240 positions Tool shank: JIS B 6339, tool shank 40T Pull stud type: JIS B 6339, pull stud 40P Max. tool diameter: 80 mm Max. tool diameter with free auxiliary stations: 150 mm Max. tool length: 300 mm Max. tool weight: 10 kg Tool selection: Fixed address system Tool change arm: W-gripper type Feed Rates Rapid traverse rate, X/Y/Z-axis: 50 m/min Rapid traverse rate, B-axis: 30 min⁻¹ Rapid traverse rate, C-axis: 50 min⁻¹ Feed rate, X/Y/Z-axis: 1 to 50 m/min Feed rate, B-axis: 30 min⁻¹ Feed rate, C-axis: 50 min⁻¹ Rapid traverse acceleration, X/Y/Z-axis: 0.6 G Rapid traverse acceleration, B/C-axis: 2,500 / 2,000 °/s² Max. acceleration during cutting feed, X/Y/Z-axis: 0.4 G Max. acceleration during cutting feed, B/C-axis: 2,000 / 4,000 °/s² Tipping feed rate, X/Y/Z-axis: 0 to 4000 mm/min Tipping feed rate, B/C-axis: 0 to 11.11 min⁻¹ Min. movement increment, X/Y/Z-axis: 0.001 mm Rcedpfx Ahszqunhecef Min. movement increment, B/C-axis: 0.001° MACHINE DETAILS Control: MATSUURA G-TECH 840 DI Serial number: 350536 Electrical Connection Values Rated apparent power: 36 kVA Input voltage: 415 V Input frequency: 50 Hz Input current: 50 A Dimensions and Weight Overall length: 6,000 mm Overall width: 5,000 mm Overall height: 3,500 mm Overall weight: 15,000 kg EQUIPMENT - Chip conveyor - Coolant system - Tool holders on the tool changer External Reference: Hanon - Lot 1

Condition: ready for operation (used), Year of construction: 2008, operating hours: 10,294 h, functionality: fully functional, machine/vehicle number: P087WH855, travel distance X-axis: 700 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 300 mm, table load: 300 kg, spindle speed (max.): 10,000 rpm, TECHNICAL DETAILS Travel range, X-axis: 700 mm Travel range, Y-axis: 400 mm Travel range, Z-axis: 330 mm Rapid traverse speed: 54 m/min Spindle speed: 100–10,000 RPM Distance spindle–baseplate: 250–580 mm Main spindle power: 5.5 kW Table area: 650 × 400 mm Table load: 300 kg Tool positions: 21 MACHINE DETAILS Dimensions & Weight Dimensions: 1,565 × 2,027 × 2,336 mm Machine weight: approx. 2,200 kg Control system operating hours: 24,164 h Operating hours: 10,295 h EQUIPMENT Rjdpfx Aezul Tcehcjcf Central oil interval lubrication 100 mm column extension Interior lighting 16 additional I/O Rapid traverse with bell-shaped acceleration and deceleration Manual handwheel feed Directory display from memory card 1,000 storable programs Multilingual display Thermal compensation of XYZ axes Parameter back-up function Retraction cycle for tapping without a collet MANUAL GUIDE Background editing Extended part program editing Coordinate system selection G92 Workpiece coordinate system G52–G59 48 additional workpiece coordinate systems G54.1 Return to reference point G28 Quick Editor Setup file Production counter Tool correction memory C for D/H code and wear Thread cutting without a collet M29 Subprogram call M98/M198/M99 Customer macro B G65, G66/G67 Drilling cycles G73, G74, G76, G81, G89/G80 Coordinate system rotation G68/G69 Circular interpolation with R programming AI Contour Control I G05.1 Helical interpolation Skip function G31 Multi-step skip G31 P1–P4 Check of travel limit before movement Check of stored travel limit 1 Check of stored travel limit 2 G22/G23 Customer PMC Real-time customer macro

Condition: used, Year of construction: 2004, functionality: fully functional, CNC gear hobbing machine Control: Siemens 840 D Power Line Technical data: Max. workpiece diameter: 150 mm Table diameter: 145 mm Max. table speed: 800 rpm Distance between centers: 10 – 200 mm Max. axial travel: 250 mm Swivel angle of milling head: +/- 45° Max. tailstock travel: 300 mm Max. rapid traverse rate: 17,000 mm/min Drive power of milling head: 19 kW Max. module: 3 mm Max. speed of milling spindle / tool speed: 4,500 rpm Max. diameter of hobbing cutter: 80 mm Max. length of hobbing cutter: 200 mm Dimensions approx.: 5.5 x 3.7 x 3.1 m Weight approx.: 9,500 kg Equipment: Chip conveyor Oil mist extraction / oil extraction Oil cooler Steady rest with lowering device and vertical adjustment Rotary ring loader with two workpiece grippers Loading belt system for automatic feeding 5 milling arbors / hobbing cutter holders: 1 x Ø 22 mm Rodpfxezkwvno Ahcjcf 2 x Ø 27 mm 1 x Ø 32 mm 1 x Ø 40 mm Other: Video recordings via WhatsApp

Condition: excellent (used), Year of construction: 1980, Horizontal gear hobbing and threading machine for gears, splined shafts, worm screws, threads, and pinions up to 5 meters in length, complete with 3 milling heads models APFW, APGS, APG, set of gears, various steadies, and indexing device. Rcodpfx Aheyba Rwecef

Condition: used, Year of construction: 1999, Technical details: max. wheel diameter: 280 mm max. module: 7 weight of the machine ca.: 13 t Rcsdpfx Aheyzxbcjcjf table turning speeds: 100 U/min table diameter: 250 mm min. number of teeth: 4 hob turning speeds: 1500 U/min max. hob diameter: 160 cutter length max.: 230 mm Machine in good condition. Available 01.08.2024 *

Condition: new, Year of construction: 2025, operating hours: 60 h, functionality: fully functional, workpiece weight (max.): 40,000 kg, wheel width: 3,700 mm, feed length X-axis: 2,000 mm, feed length Y-axis: 1,300 mm, feed length Z-axis: 500 mm, rotary table diameter: 3,700 mm, position of the milling head: 0,025, table diameter: 2,000 mm, feed rate X-axis: 10 m/min, feed rate Y-axis: 10 m/min, feed rate Z-axis: 6 m/min, total length: 12,000 mm, gear diameter: 400 mm, total height: 5,000 mm, total width: 4,000 mm, Equipment: CE marking, documentation/manual, rotational speed infinitely variable, TECHNICAL REQUIREMENTS GEAR HOBBING MACHINE GHM 2500 CNC Description of the main components of the GHM 2500 machine The GHM 2500 CNC gearing milling machine is a machine tool intended for processing by milling toothed wheels and toothed crowns. The machine is equipped with an external teeth milling head - which can process the teeth with an inclination angle from 0 to +/- 45 degrees - and an internal teeth milling head. The machine is composed of a milling unit, a unit for clamping and rotating the workpiece and the pinion axis centering tip. The milling/gearing unit is provided with three translation axes and two rotation axes, as follows: -X axis: longitudinal/radial movement towards the workpiece axis Rcsdpfsy A Nglsx Ahcof -Y axis: vertical movement of the gearing head -Aza Z: tangential movement of the gearing head -Axis: inclination +/-45 degrees of the gearing head -Axis C: rotation of the main axis of the gearing head The part fixing unit (the machine plate) has a rotation axis, axis B, for rotating the part. 1. External Gearing head – the housing of the tooth milling head is a GG300 gray cast iron cast piece. On the front side there are the counter guides of the Y axis (vertical movement of the head). Inside are the main tool actuation mechanisms, the mechanism for the horizontal movement of the gearing head axis and the mechanism for tilting the gearing head. The main actuation mechanism of the gearing shaft is composed of a 55 kW – S1 motor, a ZF angular reducer and a gearing shaft, mounted in the housing of the toothing horse. 2. Internal Gearing head – the housing of the tooth milling head is a GG300 gray cast iron cast piece. On the front side there are the counter guides of the Y axis (vertical movement of the head). Inside are the main tool actuation mechanisms, the mechanism for the horizontal movement of the gearing head axis and the mechanism for tilting the gearing head. The main actuation mechanism of the gearing shaft is composed of a 55 kW – S1 motor, a ZF angular reducer and a gearing shaft, mounted in the housing of the toothing horse. 3. The Quill - has the role of fixing the high parts, having a vertical displacement stroke. 4. The longitudinal advance mechanism of the upright, X axis – is made by a servo motor 30 Nm_ 3000 rpm, a Gressner worm reducer and a ball screw diam. 80 x 10, accuracy class IT 3. 5. The vertical advance mechanism of the toothing head, Y axis – consisting of a 30 Nm_ 3000 rpm servo motor, a Gressner worm reducer and a ball screw diam 80 x 10, precision class IT3. 6. Plate advance mechanism / plate rotation, C axis – is made with two 50 Nm_ 2000 rpm servo motor, a Gressner worm reducer and a duplex worm that meshes with the worm crown located on the plate. 7. The gearing head tilting mechanism, axis B – is made by a / 20 Nm_3000 rpm servo motor, a Gressner worm reducer and a worm gear-segment worm gear transmission. 8. The axial displacement mechanism of the gear head, Z axis – is made by a 20 Nm_3000 rpm servomotor, an Alpha Getriebe planetary reducer and a ball screw diam. 63 x 10, accuracy class IT3. 9. Top horizontal positioning mechanism, auxiliary axis X1 – a 20 Nm_ 2000 rpm servo motor, an Alpha Getriebe planetary reducer and a ball screw diam 63 x 10, precision class IT5.

Condition: ready for operation (used), Year of construction: 1970, Gear hobber ZFWZ 6300x40 Manufacturer: WMW-MODUL Model: ZFWZ 6300x40/1 Year of manufacture: 1970 Max. workpiece diameter: 7100 mm Gear width: 1500 mm Max. module: 45 Table diameter: 5300 mm Rodpfx Ajxln Iwshcjcf Cutter diameter x width: 400x500 mm Max. helical angle: 45 degrees Hob diameter: 500 mm Hob speeds: 9–63 rpm Total power requirement: 47 kW Machine weight: 160 tons Equipped with standard hobbing head, tangential hobbing head, internal milling head, change gears, supports. Video available.

Condition: ready for operation (used), functionality: unexamined, Gear hobbing machine – Celta model C4, with a cutter diameter of 480 mm, maximum workpiece diameter of 550 mm, and maximum module of 8. Total power: 9 kW, estimated weight: 4500 kg. Redpfx Ajzbzygehcscf

Condition: ready for operation (used), Year of construction: 2011, functionality: fully functional, machine/vehicle number: 135001, travel distance X-axis: 1,350 mm, travel distance Y-axis: 620 mm, travel distance Z-axis: 810 mm, spindle speed (max.): 12,000 rpm, number of slots in tool magazine: 40, No minimum price – guaranteed sale to the highest bidder! Submitting a bid obligates you to collect the machine on time between September 21st and October 1st! TECHNICAL DETAILS Travel in X-axis: 1,350 mm Travel in Y-axis: 620 mm Travel in Z-axis: 810 mm Feed rate and rapid traverse Feed rate X/Y/Z-axis: 15 m/min Rapid traverse X/Y/Z-axis: 30 m/min Rcodpfx Ajzqunuohcjf Spindle Spindle speed: 12,000 rpm Spindle drive power: 10 kW (100% ED) Spindle drive power: 12 kW (40% ED) Spindle mounting: ISO 40 Spindle bearing diameter (front): 70 mm Spindle bearing diameter (rear): 60 mm Spindle operating hours: 6,510 h Distance from spindle to table: 90 – 900 mm Distance from spindle center to machine frame: 655 mm Tool magazine Tool magazine capacity: 40 Max. tool length: 300 mm Max. tool diameter with occupied neighboring positions: 80 mm Max. tool diameter with free neighboring position: 125 mm Work table Table length: 1,550 mm Table width: 620 mm Number of table slots: 6 Control system Control system manufacturer: HEIDENHAIN Control system model: iTNC 530 MACHINE DETAILS Input voltage: 400 V Input frequency: 50 Hz Input current: 63 A Rated apparent power: 35 kVA Dimensions and weight Overall length: 7,000 mm Overall width: 2,700 mm Overall height: 2,900 mm Machine weight: 8,650 kg EQUIPMENT - Dividing head, 4th and 5th axis, manufacturer WALTER, type TANIH 200 - LANG 5-axis clamping system - RENISHAW measuring probe - Chip conveyor - Documentation and manuals External reference: Wahl - Lot 69 Note: without the machine vice located on the clamping surface.

Condition: good (used), Gear hobbing machine, milling machine, tool milling machine, vertical milling machine, roller milling machine, gear hobbing machine, gear hobbing machine, high-performance hobbing machine -Manufacturer: Liebherr, high-performance gear hobbing machine type SS 5-K/500 -Working area: Ø max. 500 mm -Max. cutter diameter: 186 mm Accessories: Includes extensive accessories (see photos) -Not included: Template for helical gearing -Machine dimensions: 2300/1460/H1870 mm -Accessory dimensions: Pallets 1420/1300/H300 / 1200/800/300 mm Rcjdpfx Ahsv Dtmmscef -Weight: 5300 kg plus 535 kg accessories

Condition: used, functionality: fully functional, Maximum working diameter: 2100 mm Table size: 1800 mm Rcsdpfxoylprfo Ahcsf Minimum diameter: 200 mm Maximum number of teeth: 45 Max. module: 20 Weight: 40 tons