Used Deckel Maho Dmu 50 Eco for sale (337)

Condition: good (used), Year of construction: 2004, functionality: fully functional, operating hours: 39,000 h, travel distance X-axis: 500 mm, travel distance Y-axis: 420 mm, travel distance Z-axis: 380 mm, total height: 5,600 mm, total length: 9,000 mm, overall weight: 6,000 kg, controller model: Heidenhain Mill Plus IT, For sale is a 5 axis machining center of the Makre DMU and type 50 eVolution Please note the GMN high frequency spindle Chodpfxetyit Ee Adyea spindle HCS 30.000 /15 and the 92-fold tool changer The machine is in good condition and fully functional Technical data Year of construction: 2004 Operating hours: approx. 39,000 h Control system: Heidenhain MillPlus IT Table size: approx 500 mm ⌀ Traverse paths: X-axis: 500 mm Y-axis: 420 mm Z-axis: 380 mm A-axis: 0-180° C-axis: 360 ° Tool holder: HSK 50 Spindle speeds: max: 30,000 1/min Frequency: 500 Hz Power: 15 kW Tool places: 92 NO chip conveyor Space requirement according to drawing: 9,000*5,600 mm Transport dimensions: 2,800*3,700*2,800 mm Weight: 6,000 kg On request, transport and loading can be organized throughout Europe for an additional charge. Prices plus VAT Viewing possible by appointment. Contact us, our team will be happy to help you. Trade-in or exchange possible! Machines purchase / sale PURCHASE / SALE OF PRODUCTION & METALWORKING MACHINES AND MUCH MORE. Fzho0bc Do you need a high-quality but inexpensive metalworking machine for your production? Or do you want to sell yours? For more information or to contact us, please visit our website

Condition: good (used), Year of construction: 2000, operating hours: 53,776 h, functionality: fully functional, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 380 mm, rotary table diameter: 500 mm, rotational speed (max.): 18,000 rpm, For sale is a 5-axis simultaneous milling machine from Deckel Maho, model DMU 50 eVolution. The machine is in good condition and ready for immediate use. Technical Data: Year of manufacture: 2000 Control: MillPlus Power-on hours: 53,776 h Spindle hours: 18,512 h X-axis: 500 mm Y-axis: 400 mm Z-axis: 380 mm B-axis: 0-180° C-axis: 360° Clamping surface: Ø 500 mm Max. table load: 200 kg Chedpfxjwxd Agj Adysa Spindle taper: SK40 Max. speed: 18,000 rpm Spindle power: approx. 15 kW Tool magazine: 60 slots Dimensions: approx. 3,400 x 2,400 x 2,500 mm Weight: 5,500 kg Transport and loading can be arranged Europe-wide at an additional cost upon request. Prices are subject to VAT. Viewing possible by appointment. Please contact us—our team is happy to assist you. Trade-in or exchange possible! Machinery Purchase / Sale BUYING / SELLING OF PRODUCTION & METALWORKING MACHINES AND MORE. Are you looking for a high-quality yet affordable metalworking machine for your production? Or would you like to sell your equipment? For further information or contact options, please visit our website.

Condition: excellent (used), Year of construction: 2002, functionality: fully functional, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 400 mm, spindle speed (max.): 4,500 rpm, spindle speed (min.): 50 rpm, For sale is a Deckel Maho machining center, type DMU 50 M with path control and manual rotation axes The machine is in very good condition, fully functional and ready for immediate use. Particularly noteworthy is the possibility of working in an open cabin Technical data: Year of construction: 2002 Control: Heidenhain TNC 124 X-axis: 500 mm Y-axis: 400 mm Z-axis: 400 mm Feed speed: 5,000 mm/min Rapid traverse: 5 m/min Tool holder: SK 40 Clamping surface: Ø 700 x 500 mm Rotation range: 360 ° (mechanical) Swivel range: +90/ - 15 ° (mechanical) Max. load: 200 kg Space requirement: 4,000 x 3,500 x 2,518 mm Transport dimensions: approx. 2,500 x 1520 x 2,200 mm Weight: 2,600 kg Additional tool holders available on request Transport and loading can be organized on request, at an extra charge. can be organized throughout Europe. Cedpfxju Unh Io Adyoha Prices plus VAT Viewing possible by appointment. Contact us, our team will be happy to help you. Trade-in or exchange possible! Machines purchase / sale PURCHASE / SALE OF PRODUCTION & METALWORKING MACHINES AND MUCH MORE. Do you need a high-quality but inexpensive metalworking machine for your production? Or do you want to sell yours? For further information or contact options, please visit our website

Condition: excellent (used), Year of construction: 2002, Contouring control : Heidenhain TNC 310 Accessories available Working range X-way 500 mm Y-way 400 mm Z-way 400 mm Main drive Speed continuously programmable 20 - 4'500 rpm. tool holder SK 40 Work table Drive B/C-axis Manual Clamping surface ø 700 x 500 mm Groove distance/size 63/14H7 mm Rotation range 360 Swivel range + 95 / - 10 Dimensions Cedjp H S Uxopfx Adysha Length 1800 (750 control) mm depth 1800 mm Machine weight 2600 kg

Condition: ready for operation (used), Year of construction: 2002, Control Unit Brand HEIDENHAIN Model na Chjdpfx Adjx D Dukjyea Movement X-Axis Movement 500 mm Y-Axis Movement 400 mm Z-Axis Movement 400 mm This DECKEL MAHO DMU 50 T was manufactured in 2002. It features a spindle mount of SK40 DIN69871, a table size of 700x500 mm, and a maximum RPM of 9000. Ideal for versatile machining tasks. Contact us for more information. Application Types Milling

Condition: ready for operation (used), Year of construction: 2003, operating hours: 13,028 h, spindle speed (max.): 9,000 rpm, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 400 mm, number of axes: 5, This 5-axis DECKEL MAHO DMU 50T was manufactured in 2003. It features a 3+2 axis setup with CNC-driven linear axes and a manual swivelling rotary table for enhanced versatility. The machine comes equipped with tools and an attached tool list holder for convenience. If you are looking to get high-quality machining capabilities, consider the DECKEL MAHO DMU 50T universal machining centre we have for sale. Contact us for further details. Chjdpfx Aszmhwzodyoa - Axes: 5-axis (Typically configured as a 3+2 axis setup featuring 3 CNC-driven linear axes X/Y/Z and a manual/handwheel-operated swivelling rotary table for the B and C axes)- Included Equipment: Tools included, attached tool list holder on the enclosure shell, electronic handwheel/control pendant inside cabinet

Condition: ready for operation (used), Year of construction: 1996, operating hours: 12,800 h, number of axes: 5, This 5-axis DECKEL MAHO DMU 50V was manufactured in 1996. It features a Millplus control system with software version DV400, an external hydraulic unit for clamping devices, and a Hainbuch hydraulic vise for BZI32 collet. If you are looking to get high-quality milling capabilities, consider the DECKEL MAHO DMU 50V machine we have for sale. Contact us for more information about this machine. Additional equipment Cjdpfx Aex U Tinsdyeha • Hainbuch Hydraulic Vise for BZI32 Collet Machine Benefits Technical Machine Benefits • Machine is operated with a motor encoder due to c-axis encoder currently defective. • Internal cooling: 40 bar • External hydraulic unit for clamping devices • Counterholder on the rotary table • Rotary union on the table • Tool positions: 24 tool positions – 2 partially available (space is broken) • Measuring probe: renishaw – prepared Extra Information • Machine still under power • Space requirement: 4200x2000mm (with the cooling unit) • Control: Millplus DV400

Condition: good (used), functionality: fully functional, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 400 mm, Heidenhain TNC 310 cnc control C and B-axis manual with display swivel rotary table electronical hand wheel coolant device Technische Daten: Längsweg (X-Achse) / X-travel longitudinal 500 mm Querweg (Y-Achse) / Y-travel cross 400 mm Senkrechtweg (Z-Achse) / Z-travel vertical 400 mm Werkzeugaufnahme / spindle taper SK40 Drehzahlbereich / spindle speed range 20-4500 UpM Vorschub / feed 5000 mm/min. Codpsy E Iztefx Adyeha Gewicht ca. / weight ca. 2800 kg Technische Daten, Zubehör und Beschreibung der Maschine sind unverbindlich - Technical data, accessories and description of the machine are not binding.

Condition: ready for operation (used), Year of construction: 1999, functionality: fully functional, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 400 mm, rotational speed (max.): 4,500 rpm, controller model: Heidenhain TNC 310, TECHNICAL DETAILS X-axis travel: 500 mm Y-axis travel: 400 mm Z-axis travel: 400 mm Tool holder: SK 40 Spindle speeds: 20-4500 rpm MACHINE DETAILS Chsdpfoywgtxox Adysa Control: Heidenhain TNC 310 Dimensions & Weight Space requirements: approx. 2.15 x 2.00 x 2.50 m Machine weight: approx. 3 t EQUIPMENT Swivelling rotary table Documentation

Condition: used, Year of construction: 1999, x-travel 500 mm y-travel 400 mm Chsdpfx Adoy Aa Nksysa z-travel 400 mm control Heidenhain weight of the machine ca. 3200 kg

Condition: excellent (used), functionality: fully functional, Universal milling machine Deckel Maho DMU 50M with line control TNC 124 from Heidenhain TOP condition !!! Technical data: >> Year of construction 1998 >> Heidenhain control TNC 124 >> Traverse paths X500/Y400/Z400 >> C and B axis manual with display >> Speed 20- 4500 1/min >> Feed 5000mm/min >> rapid traverse 5m/min >> Tool holder SK 40 >> Table Ø700x500mm >> swivel range +95° /-10° >> electronic handwheel >> Weight 2800Kg Cjdpfx Ajr Hbf Esdyjha >> Machine dimensions approx. 4.0 m x 2.5 m height 2.6 m >> Coolant device >> Power connection 400V 32A About the machine : We are offering a Deckel Maho DMU 50M universal milling machine with a Heidenhain TNC 124 line control in very good condition. The table is manually (digitally) adjustable by two additional axes B and C. A very easy to operate control, it can enter and approach positions, deep and thread drilling, drilling patterns, hole circles, hole rows and rectangular pocket milling. Programs can be entered and read out via an interface. The Heidenhain line control makes work easier and even more precise. The milling machine was used in a large company for training purposes. Take the opportunity to inspect and try out the machine under power on site.

Condition: excellent (used), functionality: fully functional, Universal milling machine Deckel Maho DMU 50M with line control TNC 124 from Heidenhain TOP condition !!! Technical data: >> Year of construction 1998 >> Heidenhain control TNC 124 >> Traverse paths X500/Y400/Z400 >> C and B axis manual with display Cedpfsr Hbf Tjx Adyeha >> Speed 20- 4500 1/min >> Feed 5000mm/min >> rapid traverse 5m/min >> Tool holder SK 40 >> Table Ø700x500mm >> swivel range +95° /-10° >> electronic handwheel >> Weight 2800Kg >> Machine dimensions approx. 4.0 m x 2.5 m height 2.6 m >> Coolant device >> Power connection 400V 32A About the machine : We are offering a Deckel Maho DMU 50M universal milling machine with a Heidenhain TNC 124 line control in very good condition. The table is manually (digitally) adjustable by two additional axes B and C. A very easy to operate control, it can enter and approach positions, deep and thread drilling, drilling patterns, hole circles, hole rows and rectangular pocket milling. Programs can be entered and read out via an interface. The Heidenhain line control makes work easier and even more precise. The milling machine was used in a large company for training purposes. Take the opportunity to inspect and try out the machine under power on site.

Condition: used, Year of construction: 2004, Rotary table from DMU 50eV / Series 1104..... including C/B motors and Heidenhain measuring devices The rotary table was overhauled in 2023 all bearings and seals are new hoses etc. are also new Chjdpfxjy Amkze Adyea

Condition: ready for operation (used), Year of construction: 1998, Spindle speed range: 9000rpm, travel X/Y/Z: 500mm/400mm/400mm, feed rate: 10000mm/min, rapid traverse: 12m/min. Table dimensions X/Y: 700mm/500mm, max. table load: 200kg, number of T-slots: 7, distance between T-slots: 63mm. Control: Heidenhain, tool changer: 16-fold, dimensions X/Y/Z: 4000mm/2200mm/2450mm, weight: approx. 3500kg. Csdpfew Tc Nyjx Adyeha

Condition: excellent (used), Year of construction: 2002, functionality: fully functional, travel distance X-axis: 500 mm, travel distance Y-axis: 400 mm, travel distance Z-axis: 400 mm, feed rate X-axis: 5 m/min, feed rate Y-axis: 5 m/min, feed rate Z-axis: 5 m/min, spindle speed (max.): 4,500 rpm, Equipment: rotational speed infinitely variable, Dear Sir or Madam, For sale is a 3+2-axis CNC machining center, type Deckel Maho DMU50M. The Heidenhain TNC310 contouring control (also available with Siemens 810D!) makes the DMU a fully-fledged CNC machine for both production and training applications. Due to the absence of a tool changer and the conveniently positioned maintenance doors, the DMU50M requires very little space and can be positioned almost directly against a wall. The machine has been thoroughly tested in our workshop, is therefore in excellent condition, and is ready for immediate use. We look forward to receiving your inquiry! Delivery time: immediately available Machine no. xxxx Chedsv Sy Sfepfx Adyea Year of manufacture: 2002 Control: Heidenhain TNC310 or Siemens 810D (including Shopmill) Table design: Rotary and tilting table Speed: 20-4500 rpm, continuously programmable Feed rate: 0-5000 mm/min, continuously programmable Travel ranges X/Y/Z: 500/400/400 mm Tool holder: SK40 Tightening system: pneumatic Handwheels: 3-axis electronic / B+C axes mechanical Weight: approx. 2800 kg Further equipment and accessories: upon request Our service promise to you: - We are a certified master machine shop - All machines are thoroughly checked - All lubricants and any worn parts are replaced in advance - Upon request, we can completely or partially overhaul the selected machine - About the paint color of the selected machine You can decide freely. - If you wish, you can order additional accessories such as tools, etc. directly. - If you wish, we can install additional accessories such as safety devices, etc. - We are happy to take care of shipping and/or installation.

Condition: ready for operation (used), Year of construction: 2001, - USED - 5-AXIS VERTICAL MACHINING CENTRE WITH ROTARY AND TILTING TABLE X-AXIS TRAVEL: 500 mm Y-AXIS TRAVEL: 400 mm Z-AXIS TRAVEL: 400 mm SPINDLE: 9000 rpm; 13 kW; SK40 DIN 69871 B-AXIS: -10° +95 ° C-AXIS: 360 ° TABLE SIZE: 700 x 500 mm MAX ADMITTED LOAD: 200 Kg TOOL MAGAZINE: CHAIN-TYPE ; 16 POS CONTROL UNIT: HEIDENHAIN TNC 430 WEIGHT: 3000 Kg Codpfx Adowl R Dqoysha OVERALL DIMENSIONS: 2000 x 1520 x 2140 mm ACCESSORIES: SWARF CONVEYOR NOTE: MANUAL 5th AXIS

Condition: ready for operation (used), Year of construction: 2002, operating hours: 18,419 h, functionality: fully functional, travel distance X-axis: 630 mm, travel distance Y-axis: 560 mm, travel distance Z-axis: 560 mm, workpiece weight (max.): 350 kg, number of slots in tool magazine: 24, No minimum price – guaranteed sale to the highest bidder! TECHNICAL DETAILS Travel range, X-axis: 630 mm Travel range, Y-axis: 560 mm Travel range, Z-axis: 560 mm Tool magazine slots: 24 Tool holder: SK 40 Rotary range, C-axis: 360° Table clamping surface: 600 x 1,000 mm Table diameter: 600 mm Maximum table load: 350 kg Table weight: 800 kg Number of T-slots: 8 / 1 T-slot width: 14 H12 / 14 H7 T-slot spacing: 63 mm MACHINE DETAILS Number of axes: 5 (3+2) EQUIPMENT Controlled NC swivel milling head (B-axis) Chsdpfxjzpxdws Adysa NC rotary table integrated in the fixed table (C-axis)

Condition: ready for operation (used), Year of construction: 2002, functionality: fully functional, travel distance X-axis: 880 mm, travel distance Y-axis: 630 mm, travel distance Z-axis: 630 mm, controller model: Heidenhain iTNC 530, spindle speed (max.): 12,000 rpm, No minimum price – guaranteed sale to the highest bidder! The spindle was replaced on November 14, 2018. TECHNICAL DETAILS Travel in the X-axis: 880 mm Travel in the Y-axis: 630 mm Travel in the Z-axis: 630 mm Spindle speed: 12,000 rpm Controlled B-axis: -15° to +90° Tool holder: SK 40 Number of tool magazine slots: 32 MACHINE DETAILS Control system: Heidenhain iTNC 530 Codpfx Adszpw Iujyjha Spindle operating hours: 50,033 h EQUIPMENT Coolant system

Condition: used, Year of construction: 1997, operating hours: 32,000 h, total height: 2,700 mm, total length: 5,500 mm, total width: 2,500 mm, Colour: White Empty weight: 13.000 kg - Year: 1997 - Documentation available: Yes - CE marking present: Yes - CE certificate present: No - Serial number: 120245 - Operating hours: 32000 - Drive system: CNC - Horizontal/vertical: Horizontal and vertical - Control system brand: Heidenhain Cjdoy Uv U Hspfx Adyeha - Number of axes [pcs]: 5 - X-axis travel [mm]: 1200 - Y-axis travel [mm]: 880 - Z-axis travel [mm]: 800 - C-axis rotation [°]: 360 - Table length [mm]: 1250 - Table width [mm]: 1000 - Tool holder: SK40 - Max. spindle speed [rpm]: 18000 - Options: Digital readout, Tool magazine - └ Type of digital readout: Heidenhain - └ Tool magazine [pcs.]: 30 - Transport dimensions: 5500mm x 2500mm x 2700mm (l x w x h) - Transport weight [kg]: 13000kg - 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

Year of construction: 2001, operating hours: 26,266 h, condition: used, Colour: Grey Empty weight: 7.000 kg Dimensions (LxBxH): 350 x 220 x 240 cm Price: On request Milling machine, VMC Model: CNC Manufacturer: DMG / Deckel MAHO Chjdpfxsywt Nyo Adysa Type: DMU60T Year of manufacturing: 2001 Control: Heidenhain Working-hours: 26266 Travel: 630x560x560mm Spindle-speed: 10.000 rpm Table-dimensions: 1000x600mm Spindle-take: ISO40 Max. Workpiece-weight: 400kg Incl. Filter Interlit SK200-760 Incl. Automatic toolholder Incl. Documents Incl. Video available Machine-weight: 6700kg Machine-dimensions: 3500x2400x2200mm - Year: 2001 - Documentation available: Yes - CE marking present: Yes - CE certificate present: No - Operating hours: 26266 - Drive system: CNC - Control system brand: Heidenhain - Number of axes [pcs]: 3 - X-axis travel [mm]: 630 - Y-axis travel [mm]: 560 - Z-axis travel [mm]: 560 - Table length [mm]: 1000 - Table width [mm]: 600 - Tool holder: SK40 - Max. spindle speed [rpm]: 10000 - Options: External cooling, Tool magazine - Transport dimensions: 3500mm x 2200mm x 2400mm (l x w x h) - Transport weight [kg]: 7000kg - 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: 2015, control Haidenhein serial number 10981203183 Chedpfx Ajzpbl Rodyea Axis 5 ja x-travel 1.250 mm y-axis 1250 mm z-travel 1000 mm workpiece diameter: 1250 mm Ja not simultaneously

Condition: good (used), Year of construction: 2011, functionality: fully functional, Discover the used 5-axis machining center DECKEL MAHO DMU 60 eVo, manufactured in 2011. This machine is equipped with a Siemens control system and, thanks to features such as internal cooling, a measuring probe, and laser measuring, offers the highest precision for complex manufacturing tasks. A very well-maintained and immediately ready-for-use machining center for demanding users. Technical data of the Deckel Maho DMU 60 eVo: Travel in X-axis (mm) 650 Travel in Y-axis (mm) 500 Travel in Z-axis (mm) 500 Travel in B-axis -5/+110 C-axis nx360 Number of axes 5 Spindle speed (rpm) 14000 Spindle power (kW) 18.9 Tool interface SK40 Weight (kg) 10000 Machine hours (h) 15995 Year of manufacture 2011 Control system Siemens 840D SL Control type CNC Total power requirement (kW) 50 kVA Weight (kg) 10000 kg Location Baden-Württemberg Delivery September 2026 Equipment and accessories: -Internal cooling -Chip conveyor -Laser measuring -Measuring probe -3D-quickSET for checking and correcting the 4- and 5-axis kinematics Chodpfx Adozq Eghjysa -Band filter -Used tool holders -Coolant gun

Condition: ready for operation (used), Year of construction: 2003, operating hours: 93,500 h, travel distance X-axis: 1,180 mm, travel distance Y-axis: 710 mm, travel distance Z-axis: 710 mm, controller manufacturer: HEIDENHAIN, controller model: TNC 430, number of axes: 5, This 5-axis DECKEL MAHO DMC 100 T was manufactured in 2003. It features X, Y, Z travels of 1,180 mm, 710 mm, and 710 mm respectively, a SK40 tool magazine with 32 positions, internal coolant supply, and a chip conveyor. Consider the opportunity to buy this DECKEL MAHO DMC 100 T vertical machining centre. Contact us for more information about this machine. Machine Benefits Technical Machine Benefits Chedpfox T Dgnex Adyoa • Internal coolant supply • Chip conveyor Extra Information The machine is mounted on a beam and has not been connected to the mains since November 2025!The buyer purchases the item subject to the exclusion of any liability for material defects!The spindle was replaced in 2022 for approximately 20,000.00 euros!The spindle has clocked up only approximately 1,400 hours since then Technical Specification Through-spindle Coolant Yes

Condition: used, CNC 3+2 axis vertical machining center DECKEL MAHO type DMU 35 M CNC control SIEMENS 810D with ShopMill Manufacturer no. 11065353554 Year of manufacture 2001 Travel paths: X: 350 mm, Y: 240 mm, Z: 340 mm Table movements: C-axis: 360° Swivel range: +105° / -15° Universal swivel - rotary table: 400 x 290 mm, center hole 30H6 Table load: max. 100 kg Distance spindle nose - table: min. 145 mm to max. 485 mm Feed rate: 5,000 mm/min Rapid traverse (X / Y / Z): 5 m/min Input resolution: 0.01 mm Total power requirement: 15 kVA Chjdpfxjvt D D Uj Adyea Speed range - main spindle: 20 - 6,300 min/-1 Drive power - main spindle: 6.3 / 10 kW (100% / 40% ED) Torque: max. 55 / 80 Nm Tool holder: SK 40 DIN 69871 Pull bolt: DIN 69872 or ISO 7388/2 Type B Interface: Serial RS232C, LAN (RJ45) Power connection: 400 volts, 50 Hz, 15 kVA Compressed air connection: 6 bar - CNC control Siemens Sinumerik 810D with ShopMill V05.03.22, NCU 03.03.34-CCU1E, MMC103 - 3-axis controlled (X, Y and Z axis) - Manual swivel rotary table, C axis = table rotation 360°, B-axis = swivel range +105°/ -15° - direct path measuring system for all 5 axes - electronic handwheel - spindle drive via servo motor with toothed belt and 2 gear stages - fully protected cabin with sliding door - swiveling control panel - coolant nozzles on the vertical head - chip tray with coolant container and cooling lubricant pump - work area lighting - documentation available space requirement L x W x H 2000 x 2000 x 2100 mm weight 1750 kg good condition

Condition: excellent (used), Year of construction: 1999, Control system: Heidenhain TNC 426 Travel ranges X/Y/Z: 1250 x 880 x 800 mm Spindle speed: 8,000 rpm Tool magazine for 60 tools, SK 50 Universal milling head +0° / -90° indexing Cedpfx Adozqv A Toyjha NC rotary table 1250 x 1000 mm Chip conveyor Measuring probe