engine grinding used for sale

: neu : ca. 6 Monate ab Auftragse : Taiwan : 83670 € : 1581.36 € : 810 mm : 610 mm : 800 x 400 mm : 800 x 400 mm : 5 - 25 m/min : 0 - 2.250 mm/min : 450 mm : 0 - 675 mm/min : 480 mm : 500 - 2200 1/min : 3,75 (optional 5,5 / 7,5) kW : 1.5 kW : 3250 mm : 3075 mm : 2250 mm : 2900 kg : 175 kg : 350 kg : 355 x 50 x 127 mm : 1,1 kW Fully enclosed splash guard 10.4", graphic NC control on a swivel arm with touchscreen for: Operating mode selection Cycle selection and program creation Surface grinding Cross grinding Plunge grinding Dressing with automatic compensation Semi-automatic balancing in the machine Automatic spindle speed for constant surface speed Spindle load visualization Unbalance control Graphical status monitoring Alarm list automatic vertical feed servo drive for grinding wheel feed and table cross feed heavy duty spindle with 2 sets (4) of class P4 super precision angula ...

VELP OV 625 homogenizer complete with grinding rod and stand New equipment in its original packaging Model No.SA20900470 OV625 Materials: Aluminium – Technopolymers Volume: 0.2 ml – 2.5 L H2O Maximum viscosity: up to 5,000 mPa s Speed: 3,000 – 25,000 rpm Speed Control: Digital Speed adjustment accuracy: 200 rpm With 20mm diameter dispersing tool With stand Power consumption: 800 W Weight: 2.4 kg Dimensions: 92x280x130 mm (3.6x11x5.1 in)

: neu : ca. 6 Monate ab Auftragse : Taiwan : 67070 € : 1267.62 € : 800 mm : 610 mm : 800 x 400 mm : 800 x 400 mm : 810 mm : 5 - 25 m/min : 0.74 kW : 10 kVA kW : 3540 mm : 2080 mm : 2100 mm : 2900 kg : 980 mm : 350 kg : 355 x 50 x 127 mm : 0,001 mm : 500 - 1.800 U/min : 3,75 kW : 1.1 kW 10.4", graphic NC control on a swivel arm with touchscreen for: Operating mode selection Cycle selection and program creation Surface grinding Cross grinding Plunge grinding Dressing with automatic compensation Semi-automatic balancing in the machine Automatic spindle speed for constant surface speed Spindle load visualization Unbalance control Graphical status monitoring Alarm list aut. vertical feed servo drive for grinding wheel feed and table cross feed hardened slide ways in all 3 axes with needle rollers electro-magnetic chuck coolant equiptment with aut. paper filter and magnetic separator a ...

grinding diameter: 750 mm grinding length: 5400 mm centre height: 375 mm max. workpiece diameter: 750 mm workpiece weight: 10000 kg table - swivable +/-: - ° grinding wheel size: 750/650 x 75 x 305 mm grinding wheel turining speeds: 750 U/min turning speed range - workpiece: 14,5 - 86 U/min main drive motor: 15 kW workpiece drive: 7,5 kW feeds - fine adjustment: 0,00635 - 0,0508 mm/min total power requirement: - kW weight of the machine ca.: 27 t dimensions of the machine ca.: 13,5 x 3,4 m Refurbished 2023 and equipped with: - DRO - Table swivable - 9 x steadies - Coolant/Filtration Tank Machine has had over 85000,-€ of retrofit work in 2023 including: -- replacement of air bearing liners -- 7 x steadies fully overhauled -- Overhaul of top table & centre heights of workhead & tailstock -- New electrical wiring & cabinet The data for this ad was created with ModulMWS - the software s ...

: gebraucht : 2019 : 5505 : prompt, Zwischenverkauf v : Niederlande : 2670 € : 1 : 100 x 2.000 mm : 20 - 76,1 mm : 1 : 3 kW : 190 kg DEMO MACHINE / MINT CONDITION The lever operated AL100U-01 can grind material from Ø 20 mm to Ø 76.1 mm. Its compound slide and carriage with rotatable clamp are continually adjustable allowing the machine to grind all pipe sections at any angle between 30° and 90°. The ALMI AL100U-01 can be used to grind square, rectangular and round pipes with a range of wall thicknesses and is suitable for all customary types of materials. ALMI’s belt tensioning system simplifies tensioning the grinding belt. The belt is tensioned using the hexagonal spanner supplied with the machine. The grinding belt can be tensioned quickly and the grinding rollers can be changed in seconds. All pipe grinders are equipped with a deburring table. Incl. 5 pcs. grinding belts, 1  ...

: neu : ca. 2 - 4 Wochen ab Auftr : Niederlande : 6352 € : 122.59 € : 150 x 2.000 mm : 20 - 114,3 mm : 1 : 1 : 4 kW : 270 kg The AL150 can be operated with two hand-wheels or a lever. The machine is equipped with both options. The AL150 can be used to grind material from Ø 20 mm tot Ø 114.3 mm. The compound slide and carriage with rotatable clamp are continually adjustable, which means the machine can grind all pipe sections at every required angle between 30° and 90°. The ALMI AL150 can be used to grind square, rectangular and round pipes with a range of wall thicknesses and is suitable for all customary types of materials. ALMI’s belt tensioning system makes tensioning the grinding belt even easier. The belt is tensioned using the hexagonal spanner supplied with the machine. The grinding belt can be tensioned quickly and the grinding rollers can be changed in seconds.All pipe ...

: neu : ca. 2 - 4 Wochen ab Auftr : Niederlande : 7733 € : 149.25 € : 1 : 150 x 2.000 mm : 20 - 114,3 mm : 1 : 1 : 4 kW : 270 kg The new AL150HS 2 in 1 machine: grinding belt and pipe grinder. High Speed Belt thanks to a unique transmission, up to 150ft/per second. The Benefits of the AL150HS: less dust/particules, less change of colour and longer belt life (2 to 3 times) due to high speed. The AL150HS can be operated with two hand-wheels or a lever. The machine is equipped with both options. The AL150HS can be used to grind material from Ø 20 mm tot Ø 114.3 mm. The compound slide and carriage with rotatable clamp are continually adjustable, which means the machine can grind all pipe sections at every required angle between 30° and 90°. The ALMI AL150HS can be used to grind square, rectangular and round pipes with a range of wall thicknesses and is suitable for all customary type ...

: neu : ca. 2 Wochen ab Auftragse : Niederlande : 4785 € : 100 x 2.000 mm : 20 - 76,1 mm : 1 : 1 : 3 kW : 220 kg The AL100U-02 can be operated with two hand-wheels or a lever. The machine is equipped with both options. The AL100 U-02 can grind material from Ø 20 mm to Ø 76 mm. The compound slide and carriage with rotatable clamp are continually adjustable, which means the machine can grind all pipe sections at every required angle between 30° and 90°. The ALMI AL100U-02 can be used to grind square, rectangular and round pipes with a range of wall thicknesses and is suitable for all customary types of materials. ALMI’s belt tensioning system makes tensioning the grinding belt even easier. The belt is tensioned using the hexagonal spanner supplied with the machine. The grinding belt can be tensioned quickly and the grinding rollers can be changed in seconds. All pipe grinders are e ...

grinding length: 300 mm grinding width: 500 mm workpiece height: mm The data for this ad was created with ModulMWS - the software solution of LogoTech oHG.

max. grinding diameter: 175 mm grinding length: mm workpiece length: mm total power requirement: kW weight of the machine ca.: t dimensions of the machine ca.: m The data for this ad was created with ModulMWS - the software solution of LogoTech oHG.

This 5-axis WALTER HELITRONIC RAPTOR DIAMOND was manufactured in 2023. It features a tool diameter capacity of Ø3-290 mm, with an optional extension up to Ø400 mm, and a maximum tool length of 270 mm. The machine is designed for the production and regrinding of carbide, HSS, PCD, and CBN tools. If you are looking to get high-quality grinding capabilities, consider the WALTER HELITRONIC RAPTOR DIAMOND cylindrical grinding machine we have for sale. Contact us for further details.

Kellenberger, 57 U, Beautiful universal and tool grinder, under power Surface grinding, cylindrical and internal cylindrical grinding, tool grinding. X-600mm, Cross: 300, Vertical: 300 Swivel Range 360 Degree Table: 1030 x 214, rotatable, Workpiece Spindle: MK5, 50-420rpm, Center Height: 125/175mm Accessories : Grinding spindle holders, internal grinding spindle, rear grinding device, univ. vice, ... A lot of accessories: see pictures!

Kellenberger, 57 U, Beautiful universal and tool grinder, under power Surface grinding, cylindrical and internal cylindrical grinding, tool grinding. X-600mm, Cross: 300, Vertical: 300 Swivel Range 360 Degree Table: 1030 x 214, rotatable, Workpiece Spindle: MK5, 50-420rpm, Center Height: 125/175mm Accessories : Grinding spindle holders, internal grinding spindle, rear grinding device, univ. vice, ... A lot of accessories: see pictures!

Kellenberger, 57 U, Beautiful universal and tool grinder, under power Surface grinding, cylindrical and internal cylindrical grinding, tool grinding. X-600mm, Cross: 300, Vertical: 300 Swivel Range 360 Degree Table: 1030 x 214, rotatable, Workpiece Spindle: MK5, 50-420rpm, Center Height: 125/175mm Accessories : Grinding spindle holders, internal grinding spindle, rear grinding device, univ. vice, ... A lot of accessories: see pictures!

Tip height: 100 mm Center width: 500 mm Grinding wheel diameter: 300 mm Max. speed grinding wheel 2,825 min-1 Rotatable grinding head 90° left and right Max. workpiece speed: 750 min-1 Spindle cone MK 4 Tailstock 3-jaw abrasive chuck 125 mm Face Plate 160 mm Collet chuck ER 40 with collet set 28 pcs. Fixed grain tip Grinding wheel flange with grinding wheel Wet grinding equipment

grinding length: - mm grinding width: 600 x 2000 mm workpiece height: - mm Control: - table surface area: ca. 600 x 2400 mm x-travel: 2100 mm y-travel: 550 mm z-travel: 560 mm max. dia. of grinding wheel: 400 mm total power requirement: kW weight of the machine ca.: ca 7,8 t dimensions of the machine ca.: m The data for this ad was created with ModulMWS - the software solution of LogoTech oHG.

Complete disassembly Cylindrical grinding machine STUDER RHU 500 – MIRA Retrofit We have a complete exploded view from a STUDER RHU 500 cylindrical grinding machine, ideal for spare parts, repair or maintenance. The machine has been dismantled by MIRA Retrofit, specialists in the reconstruction and modernization of grinding machines, preserving its main assemblies and components for sale as spare parts. Available, among others: - Workpiece holder head and its components. - Tailstock headstock. - Grinding head and grinding assemblies. - Motors and drives. - Spindles and mechanical elements. - Trolleys, guides and moving elements. - Steering wheels, controls and mechanisms. - Hydraulic and pneumatic components. - Electrical elements. - Protections, supports and accessories. - Different original STUDER parts. Sale by individual components or possibil ...

STUDER internal grinding spindle – 40,000 rpm with accessories High-speed spindle for internal grinding STUDER is for sale, in excellent condition and properly stored in its original wooden protection box. Key features: - Type: 102540B - Maximum speed: 40,000 rpm - Compatibility: Studer S30, S40, S31, Favorit, etc. - Application: Internal grinding - High-precision construction. - Includes wheel holders/accessories and tools shown in the photographs. - Includes documentation and instructions. - Wooden box for storage and transport. Ideal as a replacement for STUDER grinding machines, for replacing an existing spindle or for repair projects. The set is delivered with the available accessories shown in the photographs, offering a particularly interesting solution for grinding workshops that need hard-to-find STUDER original equipment. National and inter ...

STUDER S20 Favorit – Universal cylindrical grinding machine 400 x 100 mm – Complete retrofit The STUDER S20 Favorit universal cylindrical grinding machine is offered for sale for high-precision external and internal grinding work. Machine completely rebuilt and subjected to a comprehensive retrofit by specialists, including mechanical, electrical and functional review. Key features: - Manufacturer: STUDER - Model: S20 Favorit, year 2002 - Distance between centers: 400 mm - Height between centers: 100 mm - External and internal grinding - CE marking - Version equipped with PLC and updated automation - Completely rebuilt machine - Revised, refurbished and adjusted components - Proven geometry and function - Excellent mechanical and aesthetic condition - Wide range of accessories available on request The machine has been carefully checked and adjusted by spe ...

Key data: 250 , 400 , 125

STUDER S21 CNC – Universal cylindrical grinding machine – 400 x 125 mm – Integral retrofit The STUDER S21 CNC universal cylindrical grinding machine is offered for sale. High precision machine designed for external, front and internal grinding operations, rebuilt and modernized by MIRA Retrofit, specialists in grinding machine reconstruction and retrofit. Equipped with turret wheel head, configured for: - 2 wheels for external grinding - 1 internal grinding wheel Description: - Manufacturer: STUDER - Model: S21 CNC - Year: 2008 - Distance between centers: 400 mm - Height between centers: 125 mm - CNC Control: GE Fanuc 21i-TB Series - Type: CNC Universal Cylindrical Grinding Machine The machine will be delivered completely rebuilt, adjusted, checked and ready to work. Availability: please consult National and international shipments. For more i ...

Key data: 1000 mm, 280 mm

We are pleased to offer the following machine for sale: JUNKER CNC Crankshaft Grinding Machine Specifications: Swing Diameter: 280 mm Maximum Chucking Length: 1,000 mm Maximum Grinding Length: 1,000 mm Grinding Wheel Diameter: 18” Maximum Workpiece Weight: 130 kg Machine Base Weight: 13,000 kg Electrical Cabinet Weight: 1,500 kg Features: Fanuc 160C CNC Control with Junker F400 JUWOP Software Converted to JUMAT 5000/50 Oil Filtration System Coolant System and Spindle Chiller Two Grinding Spindles Vitrified CBN Grinding Wheels Two Movomatic In-Process Gauges Z-Axis Lateral Locator Electrical: 480V / 3-Phase / 60Hz / 85 kVA Price: on request The machine is available for inspection by appointment. Please let me know if you are interested, and I will be happy to provide additional information, photos, and packing/shipping details.

We are pleased to offer for sale a complete high-precision manufacturing cell designed for the production of long, helical and screw-profile components, including PCP and mud motor rotors, extruder and injection molding screws, compressor and pump spindles. The equipment includes: 1. 2008 LEISTRITZ PW190.8000.HP Peeling / Whirling — Fully Operational Capacity: 120 mm (4.72”) diameter × 8,000 mm (315”) length Machine weight: 92,594 lbs (42,000 kg) 2. 2011 LEISTRITZ LWN300 Milling / Hobbing — Fully Operational 3. 2009 LEISTRITZ PW300PM Milling / Hobbing — Not in Service 4. 2014 WEINGÄRTNER FINISH 450 Finishing / Polishing — Fully Operational This equipment forms a comprehensive production route covering roughing, profile machining, semi-finishing and final surface finishing of long, high-precision helical and screw-profile components. Typical applic ...

Voumard, 20448 - C28-9D, Fortuna Internal grinding spindle, up to 28000rpm, outer diameter 90mm, length approx. 350mm Picture below left ! Other spindles on request !

Voumard, 20448 - C28-9D, Fortuna Internal grinding spindle, up to 28000rpm, outer diameter 90mm, length approx. 350mm Picture below left ! Other spindles on request !

STUDER S30 Favorit – High-precision universal cylindrical grinding machine Completely refurbished and modernized machine (complete retrofit), intended for cylindrical grinding of exterior and interior surfaces. Technical data: - Distance between points: 650 mm - Height between dots: 175 mm - External and internal grinding - Fagor digital measurement system Complete Refurbishment / Retrofit: - The machine has been completely disassembled and rebuilt piece by piece. Work carried out: - Complete mechanics overhaul - Revision and refurbishment of the guides - Refurbishment/overhaul of bearings and wear elements - Completely new electrical cabinet - New electrical installation and wiring - Complete modernization of the electrical system - Installation of Fagor digital visualizer - Review and adjustment of all sets - Full geometric adjustment and precisio ...

Grinding spindle incl. grinding wheel, 2 holders, belt wheels, electric motor, wheel cover, balancing mandrel, and description. Fortuna, 14 UA 85, Outer Ø : Ø 85 mm Length : approx. 400mm Other grinding spindles on request. See photos !

Grinding spindle incl. grinding wheel, 2 holders, belt wheels, electric motor, wheel cover, balancing mandrel, and description. Fortuna, 14 UA 85, Outer Ø : Ø 85 mm Length : approx. 400mm Other grinding spindles on request. See photos !

Key data: 270 mm, 600 mm, 9 kW

Rusticmat 2-600 Feed via inverter 1 to 10 m/min. Maximum thickness in continuous flow 500 mm Minimum length in the through-sound 300 mm Wiped 900 Kg

Wide belt sander SCM Sandya 7S Working width 1100 mm Sanding height 4-160 mm 1 metal generator 11kw 2 combi unit 11kw Combi speed adjustable by inverter Electric height adjustment Optical Oscillation Feed speed adjustable by variator 3-17m/min VACUM pump Technical documentation and CE certificate Year of manufacture 2004

Swing over table 330 mm Distance between centres 650 mm Maximum grinding diameter 200 mm Maximum workpiece weight 50 kg Grinding Wheel 610 × 75 mm Wheel spindle motor 7.5 kW / 10 HP X-axis travel 320 mm Z-axis travel 650 mm Workhead and tailstock taper MT4 Machine weight 5,400 kg

Slijphoek: 40 tot 180 graden 3,6 kW Max dia: Ø 2 > 50 mm Number of rotations grindingwheel: 2880 rpm Weight: 400 kg

ABA-WERK Aschaffenburg Hand Lever - Surface Grinding Machine FFK -Total power: 1.75 kW -Magnetic clamping plate: approx. 300 × 150 mm -Working range: approx. 350 × 300 × 150 mm -Grinding length: approx. 350 mm -Grinding width: approx. 150 mm -Max. workpiece height: approx. 150 mm -Grinding wheel dimensions: approx. Ø 200 × 20 × 76 mm -Grinding spindle speed: approx. 2,800 rpm -Table adjustment longitudinal: manual -Table adjustment transverse: manual -Height adjustment: manual -Magnetic Clamping Plate: Permanent Magnet -Machine feet -Grinding wheel protection -Extraction system Dimensions: LxWxH 1.1x1.1x1.7 meters / Weight 700Kg

Universal tool grinder DECKEL S 11 with accessories & tool cabinet -Grinding stroke 190mm -Grinding stroke for twist grinding 190mm -Longitudinal adjustment grinding spindle approx. 5mm -Vertical adjustment grinding head approx. 320mm -Transverse adjustment tool carriage approx. 100mm -Adjustment ranges: -Grinding head carrier approx. 800mm -Tool carrier approx. 215mm -Universal / part head approx. 330mm -Swivel angle / grinding head carrier 360 degrees / grinding head 360 degrees / tool carrier 360 degrees -Clamping surface tool carriage approx. 500x180mm -Max workpiece diameter between the tips 130mm -Max. workpiece diameter / flying clamping (universal parting head) 620mm -Digital display -Measuring optics -Other accessories ( SEE PICTURES) -Documentation -Tool cabinet

AEG Double Grinding and Polishing Machine – Type DP 300/2200 -Operating voltage: 380 V -Motor power: 2.2 kW -Max. disc diameter: Ø 300 mm -Max. pane width: 50 mm -Polishing spindle speed: 1,400 rpm Dimensions: LxWxH 1.2x0.4x0.9 meters / Weight 180Kg

Machine : Grinding Wheel Flange Make : Grinding wheels and grinding wheels Type: Inner cone holder Pos. Text pcs. φ φ H- Schleifsφ Schl. B φ A 3 58 74 83 400 approx. 320 B ELB 4 50 62 60 127 30-50 170 C ELB 4 44 60 68 127 20-40 180 D 1 45 60 70 127 30-60 190 E 2 27 34 44 approx. 85 -30 130 F 1 45 60 75 127 -50 190 G 1 29 35 44 Ca.85 -30 146 H 1 45 60 75 Ca.135 -60 180 I 2 45 60 75 127 30-60 180/190 J 2 27 43 56 127 -40 175 K 3 32 32 55 127 20 158 S Grinding wheel : NEW – for a centerless cylindrical grinding machine, Dilvmit+Kircher D- 10C 100/8 hp V03 , 406x200x203mm ( 270x25x25) Price: € 200,-

Double bench grinder original GREIF incl. stand Speed (min.): 3,000 rpm Grinding wheel diameter: 200 mm incl. CEE plug Power: 0.55 kW

grinding length: 600 mm grinding width: 400 mm workpiece height: 525 mm table surface area: 960 x 400 mm dimensions of grinding wheel: 350 mm table height over floor: mm : 600 x 400 mm grinding spindle speed: 3000 U/min table load capacity: 1100 kp total power requirement: 8,0 kW weight of the machine ca.: 2,1 t dimensions of the machine ca.: 2,4 x 1,9 x 2,1 m Surface grinding machine - Magnetic chuck - Coolant system with filter The data for this ad was created with ModulMWS - the software solution of LogoTech oHG.

Surface Grinding Machine Blohm

Double bench grinder original GREIF incl. stand incl. CEE plug Power: 0.55 kW Speed: 3,000 1/min Grinding wheel diameter: 200 mm

Manufacturer under license: Feinmechanik GmbH Dewozzpmtsvu Nu Iekt incl. stand with collets (see picture)

cylindrical grinding machine, year 2001. Used machine. More info & price on IndustrialBuyer.

cylindrical grinding machine, year 2012, CNC Sinumerik, con controllo di contatto Dittel Marposs Sensitron 6. Used machine. More info & price on IndustrialBuyer.

dimensions of the machine ca.: 6,2 x 3,4 x 2,6 m weight of the machine ca.: 9,6 t power requirement: 22 kW Control: FAGOR 8055i table-size: 1800x500 mm long. travel of table: 1660 mm table weight: 1700 Kg cross travel: 600 mm number of spindle speeds: 1500 U/min/rpm spindle drive: 12 kW -Usable grinding area 1,500 x 680 mm -Max. distance table – grinding wheel center 625 mm -Infinitely variable table speed 2–28 m/min -Cross-feed speed 0.02 – 5 m/min -Vertical feed speed 0.02 – 2 m/min -Infinitely variable table speed control Included -Max. grinding width (with 80 mm wheel) 680 mm -Smallest programmable CNC increment 0.001 mm -Grinding wheel dimensions Ø 400 x 80 x 127 mm -FAGOR servo motors and drives for 3 axes (X, Y, Z) Included -Electromagnetic chuck (high density) Included -Electromagnetic chuck dimensions 1,500 x 600 mm -Coolant filtration system with paper filt ...

Manufacturer: BSK Model No.: 2UDHSS Year: 2020 Condition: Used Stock number: 9511 The grinder is in good condition.

The machine is in good technical condition; it can be tested by prior arrangement.

Used CNC Internal Cylindrical Grinding Machine Danobat Overbeck ID-400 Year of construction 2021 Siemens 840D SL CNC control Center height / factory specification: 230 mm Actual measured tip height: 270 mm Internal grinding diameter 200 mm Grinding length 200 mm Max. workpiece length including clamping system 400 mm X-axis stroke 425 mm Resolution min. 0.0001 mm Feed speed 1 ~ 25,000 mm/min Linear motor Z-axis stroke 475 mm Resolution min. 0.0001 mm Feed speed 1 ~ 25,000 mm/min Linear motor Workpiece weight including chuck max. 500 kg HVX high-frequency grinding spindle, 7 kW, 75,000 rpm PREPARED for HVX high-frequency grinding spindle, 3 kW, 90,000 rpm Machine bed made of natural granite Cooling unit for cooling the linear motor drives, torque motors, spindles and the electrical control cabinet. Cooling lubricant Complete machin ...

JUNKER JUPITER 500 – CNC Cylindrical Grinding Machine Plunge-Cut Method Technical Data: Workpiece diameter: 2–220 mm Workpiece length: max. 500 mm Corundum grinding wheel: 610 × 500 × 305 mm CBN grinding wheel: 500 × 500 × 305 mm Spindle drive: 37 kW Regulating wheel: 350 × 500 × 203 mm Regulating wheel speed: 1–800 rpm Regulating wheel drive: 11.5 kW Power: 81 kVA

Op maat gemaakte polijstmachine voor het bewerken van bolle uiteinden met behulp van een fijne schuurband. Maximale werkstukdiameter: 6 meter Length L -- R: 5000 mm Depth Fw -- Bw: 2000 mm Height: 3800 mm

grinding diameter: 350 mm grinding length: 1000 mm centre height: 175 mm total power requirement: kW weight of the machine ca.: t dimensions of the machine ca.: m The data for this ad was created with ModulMWS - the software solution of LogoTech oHG.

Key data: 700 mm, 10

MAX DIAM 700,MAX MODUL 10