Used Centrifugal Grinding Machine for sale (65,348)

Condition: excellent (used), functionality: fully functional, machine/vehicle number: 1761-1700, 457 x 152mm capacity. Equipped with magnetic chuck, power rise and fall to wheel head, table guard, coolant system, and dust extraction. SPECIFICATION Jones & Shipman Model 540P Working Surface of table 457 x 152mm Longitudinal traverse of table, hand and hydraulic 483mm Total cross traverse of table, hand and hydraulic 168mm Floor to table height 1035mm Table traverse speed range per min 1.5 – 18m Cross feed range per stroke at each reversal 0.178 – 1.78mm Micrometer cross feed graduated in Vertical feed adjustment in increments of 0.002mm Vertical movement of wheelhead (max) 280mm Wheel spindle center to table (min) 50mm Size of grinding wheel 180 x 13 x 31.75mm bore Speed of wheel 2880rpm Wheelhead motor 1.5kW Hydraulic pump motor 0.55kW Machine in Imperial execution MACHINE EQUIPPED WITH Magnetic chuck Power rise and fall to wheel head Table guard Pedpfx Aenxi Uuoazorb Wheel guard Coolant System Dust extraction

Condition: excellent (used), 36" Magnetic Table# Model No 18 Prodozh Ngmjpfx Aazeb

Condition: ready for operation (used), Year of construction: 2001, DELTA LB 300 - Cup grinding machine - Grinding area max. 330x140mm - Speed range max. 2840 rpm - Max. distance table - grinding wheel 280mm - Distance grinding spindle / column approx. 300mm - Cup wheel dimensions 200x80x78mm - Drive power approx. 3 kW - Coolant system - Machine housing - Grinding wheel guard - Machine feet Prsdpfx Aaoz Dix Sozsb - Documentation Dimensions: L x W x H 0.7 x 1 x 1.8 meters / Weight 500 kg Errors and omissions excepted.

Condition: ready for operation (used), Contact grinding machine / LÖSER KS 360 / suitable for grinding pipes and round materials - Grinding range / diameter 3 - 70mm Prjdpfx Aaoz Ehqpozeb - Grinding length / endless - Belt speed 7.5 - 34 m/sec - Contact disc diameter 100-225mm - Grinding belt width 5 - 75mm - Grinding belt length 2500mm - Motor power 1.6 / 2.6 KW Dimensions: L x W x H 1.2 x 0.6 x 1.8 meters / Weight 350 kg Errors and omissions excepted.

Condition: excellent (used), Year of construction: 2017, CNC cylindrical / roll grinding machine KRAFT / Praise TT60-40L-C2-H, used – Ø 600 x 4,000 mm, Siemens Traveling-table CNC grinder for rolls and heavy shafts up to 4,000 mm between centres and 3 t between centres. Built 2016/2017 by Praise Machinery, Taiwan, and hardly used since. Located in Einbeck (Germany), available at short notice. Inspection by appointment. Technical data (manufacturer's spec sheet): - Swing over bed: 600 mm - Distance between centres: 4,000 mm - Centre height: 320 mm - Max. workpiece weight: 3,000 kg between centres, 6,000 kg on steady rests - Control: Siemens Sinumerik CNC, Siemens drives - Grinding wheel: 760 x 100 x 304.8 mm, 45 m/s, wheel motor 22.5 kW, stepless spindle speed - X-axis travel 315 mm, 0.0005 mm/pulse; Z-axis travel 4,400 mm, 10–6,000 mm/min - Workhead speed 8–80 rpm, 11.25 kW - Tailstock quill stroke 100 mm, MT 6 - Accuracy: roundness and cylindricity 0.002–0.005 mm, Ra ≤ 0.3 µm - Hydrostatic/hydrodynamic lubrication of wheelhead and carriage - Connected load approx. 45 kW, 400 V / 50 Hz - Footprint approx. 13,000 x 2,900 x 1,800 mm, weight approx. 14.7 t Equipment: - Swivel workhead 0–90° - Electromechanical tailstock quill with foot pedal - Crowning device (type C2) - Grinding wheel guard sensor Prjdpfsz Ebl Tex Aazob - 4-jaw chuck - 2 two-point steady rests (neck Ø 100–300 mm) - Dresser, wheel flange with puller, dial gauge, magnetic base - Coolant system with magnetic and paper band filter - Full enclosure with sliding doors, telescopic covers - Electrical cabinet with air conditioner - CE documentation, operating manual Dismantling, transport and re-installation can be arranged. Price on request.

Condition: good (used), Year of construction: 2011, Maximum grinding diameter 290mm, maximum grinding length 800mm, Podotudfdopfx Aazorb grinding wheel size 290mm x 63mm bore. Control Fanuc 21i-TB, workhead speed 1,000rpm, spindle power 5Kw, table swivel +6/-3.5 degrees, workhead swivel angle 0-90 degrees. internal spindle motor 1.5kw. fitted with coolant.

Condition: ready for operation (used), Year of construction: 2012, functionality: fully functional, CNC-controlled flank grinding machine for band saws • Grinding mist extraction fully integrated into the base machine • Equipped with a 4-axis CNC control system • Each movement can be controlled individually via stepper motors, resulting in minimal idle times • The clearly arranged display also serves as an operating element via a touchscreen • The advanced saw tooth can be finished-ground multiple times in one position • Pneumatic additional clamping device for stabilizing thin saw teeth, thereby increasing dimensional accuracy • Powerful coolant system with full enclosure • With a special program (option), variable tooth widths, tooth pitches, and tooth heights can be ground * Feed from the left Technical data: • Tooth pitch: 15 - 100 mm • Flank clearance angle: 0° - 7° • Blade width: 75 - 360 mm • Blade length: from 5.3 m Prjdpfx Asz Hdpwoazeb • Cup grinding wheel diameter: 75 or 100 mm • Bore diameter: 20 mm Blade height measuring device for band saws and ripsaws Safety package for cleaning system with flow monitor and pneumatic valve Machine-side connection to cleaning system for ISELI machines bc130, bc240, bc325, em300 Yellow signal lamp Grinding programs / software licenses Program for variable tooth pitches. The tooth pitch is entered on the machine's touchscreen Setup of band saws 1 set of lateral and rear blade supports, setup for narrow band saws with eccentric clamping from 25mm, vernier adjustment for the flank angle adjustments on the tooth back and tooth face, pneumatic additional clamping device for cup grinding wheels with diameters of 75 mm + 100 mm Flank grinding with radius, flank measuring device for protrusion and cutting gap.

Condition: ready for operation (used), DAREX SP 2500 / Drill bit grinding machine incl. 3 inserts -CE marking -Clamping range (drill bits) 1.6 - 26 mm -Speed range 2850 / rpm -230 Volt version -Grinding wheels / CBN or diamond grinding wheels can be used -3 grinding inserts -Documentation Dimensions: L x W x H 0.4 x 0.4 x 0.3 meters / Weight 80 kg Prsdez Evgxopfx Aazeb Errors and omissions excepted.

Condition: refurbished (used), Year of construction: 2027, functionality: fully functional, total width: 2,500 mm, total length: 5,600 mm, total height: 2,300 mm, type of input current: three-phase, feed length X-axis: 430 mm, feed length Y-axis: 1,500 mm, grinding spindle motor power: 20,000 W, overall weight: 7,400 kg, input frequency: 50 Hz, controller manufacturer: Sinumerik 840D sl, drive type: Siemens Sinamics S120, control type: CNC control, Schaudt precision for shafts up to 1500 mm in length and 500 mm in diameter – completely overhauled and modernized by Serwema Retrofit Solutions, Chemnitz. The PF5 is one of the most reliable external cylindrical grinding machines in its class: rigid bed, 20 kW grinding spindle, 600 kg between centers. Serwema completely rebuilds it, with a Siemens Sinumerik 840D sl, Sinamics S120, direct measuring systems in X and Z, and an automatic B-axis that swivels the grinding spindle from -45° to +225°: longitudinal, face, and taper grinding, shoulder grinding, and with an optional internal grinding spindle, also boring – in a single setup, without manual retooling. Proven Schaudt mechanics, new electrical systems, new drives, new safety technology: you get the performance of a new machine at a fraction of the price, inspected in Chemnitz together with you. The user-friendly interface guides the operator through work piece, wheel, and cycle data screens without the need for programming. Marposs balancing and dressing systems reduce non-productive time and protect the grinding wheel; grinding wheels up to 600 mm in diameter and 125 mm in width with a peripheral speed of 50 m/s allow for high material removal rates during rough grinding and the finest surface finishes during finishing. Application areas: shafts, spindles, rollers, hydraulic pistons, and gear components in mechanical engineering, drive technology, the printing and paper industry, and contract grinding shops. Technical data: max. grinding length 1500 mm, max. grinding diameter 500 mm, work piece weight between centers 600 kg, max. grinding wheel Ø 600 mm, max. wheel width 125 mm, peripheral speed 50 m/s, grinding spindle power 20 kW, X-axis travel 430 mm, B-axis swivel range -45° to +225°. Dimensions approx. 5.6 x 2.5 x 2.3 m, weight approx. 7.4 t. Prjdjz E H Itopfx Aazeb Scope of supply: new Siemens Sinumerik 840D sl control with Sinamics S120, air-conditioned switch cabinet manufactured in-house, direct measuring systems for X and Z, user-friendly interface, automatic B-axis, balancing and dressing (Marposs), machine enclosure with state-of-the-art safety technology, lubrication and hydraulic unit, new paint finish RAL 5015/7035, geometry inspection according to manufacturer's standard with protocol, operating manual. Options: internal grinding spindle, paper band filter with or without magnetic separator (Polo or Filtec), installation and commissioning, operator training.

Condition: excellent (used), Year of construction: 1988, functionality: fully functional, Jung JF 520 D year of manufacture 1988 magnet 500 x 175 mm Prjdpfx Aozba Ngjazob max. grinding area 600 x 220 mm variable speed variable magnetic field strength automatic start diaform coolant/filter tank 3 x flange 1 x clamp documentation machine is powered on for inspection

Condition: like new (used), Year of construction: 2019, functionality: fully functional, CNC cylindrical grinding machine Lizzini IG-FL Year of manufacture: 2019 Condition: Absolutely new Control system: Siemens 840D sl Prodpfx Aajz E Hyvezjb Equipment: - 2 external grinding wheels - 1 internal grinding attachment with C-axis and fully controlled B-axis Distance between centers: 1000 mm Distance between centers (height): 200 mm

Condition: good (used), Year of construction: 1989, grinding length: 400 mm, grinding width: 200 mm, Grinding area: 400 x 200 mm Magnetic area: 400 x 175 mm Vertical adjustment: 410 mm Grinding wheel dimensions: 225 x 25 x 50.8 mm Grinding wheel speed: 1420 / 2840 rpm Complete with: - Coolant system - Hydraulic unit - Documentation Country of origin: Germany Prsdpfx Aaev Tcy Uezeb Motor power: 1.5 kW Machine dimensions (L x W x H): 2200 x 1500 x 2100 mm Machine weight: 1100 kg

Condition: excellent (used), functionality: fully functional, total height: 1,760 mm, total length: 1,100 mm, total width: 800 mm, type of input current: three-phase, grinding wheel diameter: 125 mm, overall weight: 520 kg, input voltage: 400 V, spindle nose: ISO 40, Tool grinding machine DECKEL S11 TECHNICAL CHARACTERISTICS: Grinding wheel diameter: 125 [mm] Workpiece spindle nose: ISO 40 Paper filtration unit: No Supply voltage: 400 [V] Total power required: 2 [kVA] Dimensions: 1100 x 800 x 1760 Weight: 520 [Kg] EQUIPMENT INCLUDED: x1 universal index head - Part N°: 255X0X x10 dividing inserts for universal index head x1 tailstock with transverse adjustment - Part N°: 2621000 x1 tailstock with vertical adjustment - Part N°: 2624000 x1 swivel bracket assembly - Part N°: 2626000 x1 universal wheel dresser - Part N°: 2628000 x1 universal setting gauge - Part N°: 2570000 x1 spiral and relief grinding attachment - Part N°: 2580000 x1 relief grinding slide - Part N°: 2673000 x1 machine vice - Part N°: 2635000 x1 opto-electronic measuring unit with miscroscope - Part N°: 2650012 x2 digital readouts RSF-Elektronik x1 radius grinding attachment - Part N°: 2601X00 Podpfozz Hk Nex Aazerb x1 LED lamp x3 feet pads Machine visible under power in our premises by appointment. Price on request, loading on truck included. Possibility of shipping Worldwide. The information on this page has been obtained by the best of our ability. Therefore, its accuracy can not be guaranteed. Machine for sharpening tools, milling cutters, taps, and drills. Similar to brands such as Blohm, Elb, Ewag, Favretto, Fenix, Ger, Jones & Shipman, Jung, Karstens, NUMAFFUT, Okamoto, Okuma, Saacke, SMP, Studer, Vollmer, Walter. Also see cylindrical or surface grinders, lathes, machining centers, and milling machines.

Condition: used, Year of construction: 2022, functionality: fully functional, tooth pitch: 100 mm, grinding wheel diameter: 125 mm, grinding wheel bore: 20 mm, We offer this used Iseli Swiss BNF 100, a fully automatic 4-axis surface grinding machine, manufactured in 2022. Manufacturer: Iseli Swiss Model: Fully automatic 4-axis controlled flank grinding machine for band saws in wet grinding version / Type BNF100 Year of manufacture: 2022 • Flank grinding machine for set, as well as stellite and carbide-tipped band saws • Full enclosure with intensive water cooling • Equipped with a 4-axis CNC control system • Each movement is individually controlled via servo motors, resulting in minimal idle times • The advanced saw tooth can be finished in a clamped position • Electrically controlled, central saw blade height adjustment • Height stop for precise saw blade positioning • Use of roller linear guides for the CNC axes (stiffer machine construction and significantly increased service life) • Pneumatic saw blade clamping • Pneumatic additional clamping to stabilize thin saw teeth, resulting in increased dimensional accuracy • Operation via touch screen / color display • Data can be retrieved via the control system (standard storage space for 99,999 data sets) • Metric or Anglo-American measurement system selectable (mm or inches) Prodpfsz E Spcsx Aazeb + Dust extraction and auxiliary feed Technical data BNF100 Flank clearance angle: 0 - 7° Tooth pitch: 13 - 100 mm Blade width standard: 75 - 360 mm Blade width optional: 25 - 360 mm Blade length standard: from 5,300 mm Blade length optional: from 4,300 mm Grinding wheel variant 1: Ø 100 - 125 mm Grinding wheel variant 2: Ø 75 - 100 mm Grinding wheel bore: Ø 20 mm If you have any questions or need more information, please send us a message or call us.

Condition: good (used), grinding wheel diameter: 300 mm, type of input current: three-phase, grinding wheel width: 40 mm, overall weight: 1,850 kg, rotational speed (max.): 400 rpm, External cylindrical grinding machine Brand: GER Model: RHL-450 Fagor dimension display Grinding wheel dimensions: 300x40mm Drive: Hydraulic Distance between centers: 450mm Prodpoz Dv E Ejfx Aazob Center height: 130mm Maximum workpiece diameter: 250-255mm Workpiece spindle speeds: 55-400 rpm Motor: 3Hp Weight: 1850kg

Condition: used, Year of construction: 1989, grinding diameter 280 mm grinding length 630 mm centre height 145 mm weight of the machine ca. 2,3 t dimensions of the machine ca. 2,90x1,65x1,50 m TOS Hostivar BUAJ 28/630 – robust conventional universal cylindrical grinding machine Pedpfx Aasz Hqapozerb The machine is a conventional universal cylindrical grinding machine designed for precision grinding of cylindrical and conical workpieces. The BUAJ series is known for its robust construction and suitability for demanding industrial grinding applications. Technical specifications - Manufacturer: TOS Hostivar - Model: BUAJ 28/630 - Year of manufacture: 1989 - Machine type: Universal cylindrical grinding machine / centre-type cylindricalgrinder - Control: Conventional, non-CNC - Max. grinding diameter: 280 mm - Max. grinding length: 630 mm - Distance between centres: 630 mm - Max. workpiece weight between centres: approx. 70 kg - Centre height: approx. 145 mm - Workhead speed range: approx. 22.4–710 rpm - Grinding wheel: approx. Ø 400 × 50 mm - Main drive power: approx. 9.3 kW - Machine dimensions (L × W × H): approx. 2,900 × 1,650 × 1,500 mm - Machine weight: approx. 2,300 kg - incl. manuals

Condition: refurbished (used), Year of construction: 2026, functionality: fully functional, type of input current: three-phase, input voltage: 400 V, total height: 2,200 mm, compressed air connection: 6 bar, table load: 250 kg, control voltage: 24 V, grinding wheel diameter: 445 mm, overall weight: 1,000 kg, input frequency: 50 Hz, Equipment: documentation/manual, Fully refurbished Peter Wolters AC500 precision grinding machine. The machine has been completely rebuilt and is in like-new condition. Equipped with a new control cabinet, new Siemens PLC, and Siemens HMI. 3.5 kW main drives with 296 RPM. Maximum process pressure of 250 daN with a new Festo valve manifold and new proportional valves. New Mahr measuring control system with automatic tool positioning and switching points for load stages. Speeds, process pressures, times, and dosing can be freely programmed via passwords. Psdpfxsz Ei Tfo Aazerb The machine has a recipe memory and Ixion remote maintenance. Process support for precision grinding functions. Documentation available in paper format. CE and EN60204-1 compliant. The machine is in stock and immediately available. Inspection under power and with compressed air is welcome.

Condition: reconditioned (used), Year of construction: 2011, functionality: fully functional, Bavelloni Gemy V10 vertical straight-line grinding machine with 10 spindles and a variable mitre function, in fully refurbished condition. The machine features an extended infeed and outfeed. Only original parts were used during the refurbishment. Prsdpfx Aaozkumdozjb

Condition: used, Year of construction: 2017, functionality: fully functional, feed length X-axis: 160 mm, feed length Z-axis: 650 mm, PALMARY GU32X60 NC cylindrical grinding machine, year 2017, designed for external cylindrical grinding operations. The machine is equipped with, among other things, a 40 l/min paper filter, a CM5 collet chuck, and scales on the X and Z axes. TECHNICAL SPECIFICATIONS Capacities Maximum diameter above the table Ø 320 mm Distance between centers Pedpfx Aajzzppnjzerb 600 mm Maximum external grinding diameter Ø 300 mm Maximum load between centers 150 kg Grinding wheel Grinding wheel dimensions Ø 405 x 50 x Ø 127 mm Linear speed 45 m/s X-axis Manual travel 160 mm Automatic rapid traverse 40 m/min Maximum travel 250 mm Minimum adjustment unit 0.001 mm Handwheel rotation 2 mm Graduation 0.005 mm Z-axis Travel speed 1.5 m/min Maximum travel 650 mm Minimum travel in automatic reciprocating motion 8 mm Travel per handwheel rotation 20 mm Pivot angle -2° to +10° Work spindle Pivot angle -30° to +90° Variable speed 10 to 300 rpm Maximum spindle load, including tool holder 35 kg Maximum length 150 mm Tailstock Travel 25 mm Fine adjustment range ± 0.03 mm Motors Grinding wheel spindle 3.7 kW Work spindle – AC servomotor 0.85 kW Hydraulic pump 0.37 kW Grinding wheel spindle lubrication pump 0.18 kW Coolant pump 0.18 kW EQUIPMENT 40 l/min paper filter CM5 collet chuck X-axis scale Z-axis scale

Condition: excellent (used), Year of construction: 2008, Table size 600 x 300 mm Max. grinding area 600 x 300 mm Dimensions of the grinding wheel 406 x 50 x 127 mm Min. / max. distance table / spindle center 500 mm Table speed, hydraulically adjustable 5 - 25 m/min. Podsizka Iepfx Aazorb Cross feed 0.1 – 20 mm Cross travel 900 mm/min. Handwheel, cross 1 revolution 5 mm 1 division mark 0.02 mm Automatic vertical feed 0.001 - 0.999 mm/cycle Handwheel, vertical 1 revolution 2 mm 1 division mark 0.01 mm With AD 5 (automatic feed) 0.005 mm Grinding motor speeds 1450 / 2900 rpm Grinding motor 1.5 / 3.7 kW Hydraulic pump motor 0.75 kW Drive motor, cross 1.1 kW Drive motor, vertical 1.1 kW Machine dimensions L x W x H approx. 2300 x 1800 x 2100 mm Weight 1700 kg Accessories / Special features: • 2-axis digital display • Automatic vertical feed with spark-out and subsequent retraction • Electro-magnetic clamping table L x W 600 x 300 mm • Manual grinding wheel dressing device • Grinding wheel speed, 2 stages • 1 grinding wheel with flange • Control panel • Lighting • Coolant system with band filter and magnetic separator • Machine feet • CE compliant Siegfried Volz Werkzeugmaschinen Rüschebrinkstr. 11-153 DE - 44143 Dortmund - Wambel / Germany

Condition: used, functionality: fully functional, Workpiece diameter: 1 – 18 mm Predpfx Asz Hbchoazeb Cutting discs up to: 100 x 1 mm Bore: 20 mm

Condition: good (used), table width: 150 mm, table length: 400 mm, type of input current: three-phase, Tangential grinding machine Brand: INGAR Pjdpfx Aasz D Arrezjrb Model: RT-618-2A Grinding travel: 460x150mm X, Y axis: Automatic movement Z axis: Manual Drive: Hydraulic Manual Selter magnetic table: 400x150mm

Condition: good (used), functionality: fully functional, Mitutoyo length measuring system, model KA 12 (for longitudinal and transverse movement) Retrofitting with a CNC control system for the draw-in device, including air conditioning unit, Center distance: 630 mm, the machine has no tailstock and was specifically used for chucking operations, Max. grinding diameter: 280 mm, Max. grinding wheel size: 400 x 40 x 127 mm (not included in the scope of supply), Grinding spindle speed: 2040 rpm, 6 speed stages of the tool spindle: 22.4 to 280 rpm, Drive motor: 4 kW, Accuracy / smallest division value: 0.001 mm, Prjdpszv Uhrjfx Aazob Taper in tailstock and tool spindle: Morse 4 Largest table longitudinal travel: 760 mm, Weight between centers: 120 kg, Total power consumption: approx. 9.3 kW, Machine weight: approx. 2600 kg, Machine dimensions: L 3075 x W 1650 x H 1500 mm Year of manufacture: corresponds to the serial number: 1989 - 1991 Swiveling headstock (± 90°) and grinding head (± 45°), Hydraulic table movement and automatic feed, Cooling system, Machine lighting, Operating manual in German and electrical diagrams.

Condition: refurbished (used), Year of construction: 1992, machine/vehicle number: 92 0 20 10 19 031, total width: 1,900 mm, total length: 4,000 mm, total height: 2,000 mm, distance between centers: 1,200 mm, spindle speed (max.): 1,600 rpm, grinding spindle speed: 1,600 rpm, overall weight: 1,900 kg, input voltage: 380 V, We are offering this refurbished Karstens K19-1000 cylindrical grinding machine, manufactured in 1992. Voltage: 380 V Rated current: 48 A Inrush current: 126 A Pjdpfoz Daliox Aazjrb Fuse in the supply line: 35 A Control current: 2.5 A Machine weight: 1.9 t If you have any questions or require further information, please do not hesitate to send us a message or call us.

Condition: used, Year of construction: 2022, Sanding machine Manufacturer: SCM Type: DMC System / E83 2000 Year of manufacture: 2022 Prsdsz E Uxtopfx Aazob Technical data Position 1 RC 250-2620 working unit for rollers with a diameter of 250 mm - RA-250 steel grooved roller - Time-controlled oscillating blower for cleaning the sanding belt - Motor with 22 kW - PR-E pressure unit with 2 rubber-coated rollers at the inlet of the unit Position 2 TIE-5000 working unit for internal, adjustable cross sliding shoe - PE 32T PWM3 electronic segmented shoe EPICS pitch 32 mm with PWM3 - Motorized rotary blower - Inverter-controlled motor, power up to 15 kW Position 3 SC-2620 working unit for superfinish sliding shoe - PE 32/C PWM3 electronic segmented shoe EPICS pitch 32 mm with PWM3 - Time-controlled oscillating blower for cleaning the sanding belt - Inverter-controlled motor, power up to 15 kW Position 4 BSH 250 working unit for textured roller with a diameter of 250 mm - STY 250 brush roller with a diameter of 250 mm with Tynex bristles with a diameter of 1.27 mm - Pneumatic on/off switching of the brush roller - Inverter-controlled motor with 11 kW At the outlet SP/U 200 working unit at the outlet for cleaning rollers, diameter 250 mm - SPC 200 brush roller with a diameter of 200 mm - Motor with 1.1 kW - Time-controlled rotary blower for workpiece cleaning at the outlet of the brush unit Note: The technical data and descriptions are copies of the original order confirmation. The information is provided for informational purposes only and is non-binding.