Used Sc for sale (57,458)

Condition: used, tires, solid rubber tires, forklift tires -Manufacturer: Continental, solid rubber tires CSE-Robust Super Elastic SC 10 2 pieces -Tire size: 23 x 5 SC 10 RIM 3.75 P -Bolt circle: Ø 160 x 18 mm Hfjdpfx Adsurn Tmodjb -Recess: Ø 110 mm -Price/Delivery: complete -Weight: 41 kg/piece

Condition: used, TECHNICAL DETAILS - Number of axes : 7 - Number of spindles : 2 - Number of turrets : 2 MAIN SPINDLE - Spindle nose : A2-5" - Spindle power : 11 [kW] - Spindle speeds : 6000 [rpm] - Max. bar diameter : 51 [mm] - Max. turning diameter : 195 [mm] - C axis indexing precision : 0.001 [°] COUNTER-SPINDLE - Spindle nose : A2-5" - Spindle power : 7.5 [kW] - Spindle speeds : 6000 [rpm] - Max. bar diameter : 42 [mm] - C axis indexing precision : 0.001 [°] TRAVELS - Z stroke : 400 [mm] - X stroke : 150 [mm] - Rapid traverse rate : 36 [m/min] - Spindle / counter-spindle distance : 600 [mm] TURRET 1 - Number of positions : 24 - Number of motorized positions : 12 - X/Z stroke : 400/150 [mm] - Y stroke : +/- 40 [mm] - Live tools speed : 6000 [rpm] - Live tools power : 7.1 [kW] TURRET 2 - Number of positions : 9 POWER SUPPLY - Supply voltage : 400 [V] WEIGHT & DIMENSIONS - Machine floor space : 3072X1974 [mm] - Machine height : 1799 [mm] - Machine weight : 6500 [kg] EQUIPMENT - CNC : Fanuc 0i-TF PLUS - Interface : Ethernet / RS232 / USB / PCMCIA - Interactive programming - 3 colors status lamp - Coolant tank * Coolant through spindle - Chips conveyor : DROITE LNS MH500 Hodpsw Efgaefx Addsfb - Tool probe - Parts catcher - Parts conveying strip - Predisposition for barfeeder - Electric transformer

Condition: used, functionality: limited functionality, Year of construction: 2005, operating hours: 3,080 h, load capacity: 4,500 kg, lifting height: 6,050 mm, free lift: 1,800 mm, fuel type: gas, mast type: triplex, construction height: 2,780 mm, fork length: 1,200 mm, empty load weight: 7,500 kg, total length: 3,200 mm, drive type: Treibgas, construction width: 1,700 mm, LPG forklift Load center: 500 ISO class: ISO class 3 = 2,500 - 4,999 kg Mast type: Triplex Technical condition: poor Front tires type: Superelastic Front tires condition: 0 - 20% Rear tires type: Superelastic Rear tires condition: 0 - 20% Hfsdpfevcf Rnex Addeb Description: Engine defective Sideshift, 3rd valve, front work light, full free lift, dual tires,

Condition: new, max. cutting length 4000 mm max. sheet thickness, for mild steel 12 mm max. sheet thickness, for VA 8 mm Cutting angle 1.5° throat 350 mm Cuts 12 / min. Drive power 18.5 kW Dimensions without support arms and rear guard L x W x H approx. 4765 x 2000 x 2370 mm Weight approx. 13,300 kg Accessories / Special features: - ELGO P 40 electronic positioning indicator for the motorized back gauge o Length approx. 800 mm o Ball screw spindles - 1 heavy angle fence with tilting cams, 1000 mm - 2 heavy-duty support arms - Large throat depth of 350 mm for cutting longer metal sheets - Central cutting gap adjustment - Cutting line lighting - Flat fixed cutting angle of 1.5° - Ball rollers in the table - Upper blade with 2 and lower blade with 4 cutting edges - Plastic feet for the hold-down device - Electric foot switch - Sheet metal chute at the rear - Oil filling Hfedpfxsgiud Uo Addob - Hydraulics BOSCH, DUPLOMATIK, REXROTH or OILCONTROL - Electrics SCHNEIDER, SIEMENS, TELEMECANIQUE - Paint finish: dark gray RAL 7031, light gray RAL 7035, yellow RAL 1033 - Operating instructions - CE-compliant Delivery time: approx. 2-3 months after receipt of order plus pre-freight costs China - Germany Exclusive representation! Siegfried Volz Machine Tools Rüschebrinkstr. 151-153 D - 44143 Dortmund - Wambel

Condition: used, mileage: 499,000 km, power: 340 kW (462.27 HP), first registration: 06/2016, fuel type: diesel, overall weight: 18,000 kg, axle configuration: 2 axles, color: red, gearing type: automatic, emission class: euro6, Year of construction: 2016, Equipment: ABS, air conditioning, electronic stability program (ESP), navigation system, parking heater, DAF XF 460 FT 4x2 tractor unit, Euro 6, automatic transmission, Space Cap cab with 1 bed, power take-off, hydraulic tilt, adaptive cruise control, Lane Guard, collision warning, differential lock, light bar, rotating beacons, air horns, refrigerated compartment, sun visor, auxiliary heating, air conditioning, heated seats, roof hatch, 315/80 R 22.5 tires, Alcoa alloy wheels, radio/CD/AUX, navigation system, CB radio, single-family home Hfsdpfx Asxha Sgeddeb First owner Test logbook

Condition: excellent (used), Weiss SC 1000/+20IU Corrosion Climatic Cycle Test Chamber Weiss SC 1000/+20 JU Corrosion Climatic Cycle Test Chamber The test system is a combination of a climatic test chamber with variable temperature and humidity and a corrosion test chamber with a salt spray test. At-risk metallic components are tested for corrosion in a time-lapse manner according to the relevant standards. Temperature Working Range Temperature: +20 °C ... +60 °C Temperature variation over time: +0.5 °C Climatic Working Range Temperature: +20 °C ... +60 °C Temperature variation over time: +0.5 °C Relative Humidity: 10...98 % RH Temperature variation over time: 3...5 % RH Dew point: +12 °C ... +59 °C Salt spray test SS (ambient temperature range +5 °C ... +50 °C) according to DIN 50 021 (salt spray via dual-fluid nozzle, 1.5 x 0.5 mV 80 cm h) Control Digital measurement and control system SIMCON/32*-Net with touchscreen control panel Interfaces - Serial interface RS 232 C - Parallel printer interface Operating modes adjustable via process controller: - Temperature mode - Air conditioning mode - Salt spray test - Direct spraying with saline solution - Condensate load - Flushing test chamber walls - Drying/ventilating test chamber Hfsdpoph U Dhsfx Addsb Temperature sensor: Pt 100 resistance thermometer Humidity sensor: Psychrome fresh measuring device TFT (with forced humidification) Technical data SC 1000/+20 JU Usable space dimensions Height up to sloped roof approx. 1000 mm + roof approx. 350 mm Width approx. 1100 mm Width between heaters approx. 1000 mm Depth approx. 1000 mm Test room door made of glass, hinged on the left Height approx. 1350 mm Width approx. 1000 mm External dimensions including unit components and control cabinet Height approx. 2100 mm Width approx. 1450 mm Width with touch control panel approx. 1700 mm Depth approx. 2600 mm Floor load max. 100 kg Brine storage tank approx. 200 l, with level monitoring separately next to/behind the unit Height approx. 1000 mm Width approx. 600 mm Depth approx. 900 mm Electrical connection: 400 V Power rating: 13 kW Weight: 1300 kg Find more items – new and used – in our shop! International shipping costs on request!

Condition: used, Tires, solid rubber tires, forklift tires -Manufacturer: Continental, solid rubber tires CSE-Robust Super Elastic SC 15 from aerial work platform GSL -Tire size: 200/50-10/6.50 -Hole circle: Ø 160 x 18 mm -Recess: Ø 100 mm -Price per piece -Quantity: 2 pieces -Dimensions: Ø 445 x 200 mm -Weight: 35kg/piece Hjdpfx Adjizugyodsfb

Condition: used, System: Decanter, used Type: KHD SC 4-0.2 Hfodpjvz R Ehjfx Addjb Year of manufacture: 1993 Machine number: 5311 Max. drum speed: 2500 rpm Max. operating speed: 2500 rpm Drum inner diameter: 758 mm Drum wall thickness: 20 mm Drum material: 1.7218 Filling volume: 715 dm3 Total weight: 13,500 kg Separation technology: Sludge dewatering using decanting centrifuges (solid bowl screw centrifuges, decanters). The high centrifugal forces separate the fine solids from the suspension due to different densities.

Condition: used, mileage: 623,000 km, power: 355 kW (482.67 HP), first registration: 03/2018, fuel type: diesel, overall weight: 18,000 kg, axle configuration: 2 axles, next inspection (TÜV): 03/2026, brakes: retarder, color: white, gearing type: automatic, emission class: euro6, Year of construction: 2018, Equipment: ABS, air conditioning, electronic stability program (ESP), parking heater, soot filter, DAF XF480 FT SC with Tipping Hydraulics ---- Nutzfahrzeuge Göppl GmbH - Authorized DAF Dealer ---- First Registration: Production: 2018 MOT: 03/2026 Safety Inspection: 09/2026 Full service history: Next service in .000 km ---- Equipment: * Space Cab cabin * Mechanical cab suspension * Adjustable roof spoiler * Translucent sun visor * Driver’s seat: Luxury Air * Seat heating * Connection for air gun * Passenger seat: Basic * Upper bunk * Lower bunk with 65-liter drawer * Curtains with divider curtain * Cool box or refrigerator * Auxiliary power supply 12V/20A, 24V/2x15A+2x40A * Radio/CD player with USB port * Digital tachograph VDO G2V1 Hfjdpfsxthgisx Addjb * CB radio * Air conditioning * Stationary air conditioning * Auxiliary heater * Adaptive cruise control with FCW and AEBS * Predictive Cruise Control * Truck phone * Lane departure warning system * MX-13 engine, 355 kW/483 hp * No idle shutdown automatic * Automated TraXon 12-speed gearbox * ZF intarder * ECO performance * Tyres: 315/80R22.5 * Suspension: - Front: 8.00t parabolic - Rear: 13.00t air suspension * Rear axle ratio: 2.47 * Wheelbase: 3.80 m * Aluminium air tanks * Dual tank system: 845 + 340 liters * AdBlue tank 90 liters, left * 1st gearbox PTO NH/4c-R-32/25 * Dual-circuit hydraulic system for tipper and moving floor operation * Hydraulic oil tank approx. 200 liters * Batteries in rear overhang * Alternator 120A, batteries 2x230 Ah * Battery performance monitoring * Jost JSK42C, cast iron, fifth wheel plate 185+40 mm * Dust shield Optional: * OBU installation * Tachograph inspection * Upgrade tachograph to new version ---- Nutzfahrzeuge Göppl GmbH Weiden - Regensburg - Leupoldsgrün - Bamberg - Nuremberg Authorized DAF Dealer - DAF Service Partner - FIAT Professional Service Partner Subject to prior sale and errors Sales only to business customers

Condition: new, max. cutting length 3100 mm max. sheet thickness, for mild steel 6 mm max. sheet thickness, for VA 4 mm Cutting angle 1.5° throat 350 mm Cuts 14 / min. Drive power 7.5 kW Dimensions L x W x H approx. 3840 x 2000 x 1600 mm Weight approx. 5500 kg Accessories / special features: - NC control ELGO P 40 as electronic positioning display for the motorized backgauge, length = approx. 800 mm, ball screws - 1 heavy angle fence with tilting cams, 1000 mm - 2 heavy-duty support arms - Large projection of 350 mm for cutting off longer metal sheets - Central cutting gap adjustment - Cutting line lighting - Flat fixed cutting angle of 1.5° - Ball rollers in the table - Upper blade with 2 and lower blade with 4 cutting edges - Plastic feet for the hold-down device - Electric foot switch - Sheet metal chute at the rear Hfjdpfod Ad A Uox Addsb - Oil filling - Hydraulics BOSCH, DUPLOMATIK, REXROTH or OILCONTROL - Electric SIEMENS, TELEMECANIQUE - Operating instructions - CE-compliant Fig.: with option! Delivery time: approx. 8-10 weeks after receipt of order plus pre-freight costs China - Germany Exclusive representation! Siegfried Volz Machine Tools Rüschebrinkstr. 151-153 DE - 44143 Dortmund - Wambel

Year of construction: 2010, condition: reconditioned (used), Technical characteristics SC 1400 CC:  Plate diameter 1250 mm  Maximum turning diameter 1400 mm  The maximum height of the part under the crossbar 1000 mm  Maximum weight of the part on the plate 6000 daN  Stroke of the right vertical slide 800 mm  Side slide stroke 650 mm  Plate rotation speed 5-250 rpm  Range of working advances 0.05-5 mm/rot  Machine weight 15500 daN  Machine dimensions (L x W x H) 4060 x 4450 x 3900 mm Hsdpfxsihczyo Addjfb The vertical lathe SC 1400 CC - SIEMENS, is built with a monobloc hammer made of special alloyed cast iron, type MECHANITE. The mobile crossbar has rectified horizontal guides. The lathe is equipped with a vertical support with a revolver head for 5 tool holders and a side support. The main drive is provided by a 3-speed gearbox (transmission ratios 1:9, 1:3, 1:1) continuously adjustable, which is driven by a 75 KW electric motor and a SIMOREG electronic variator from SIEMENS. The work and fast advances of the vertical support on the X and Z axes are realized by transmission with ball screws from STAR REXROTH and electromagnetic couplings TELCOMEC ITALIA. The hydraulic unit is mounted on the drum and provides the following functions: - Automatic gear change (1:1; 1:3; 1:9) - automatic lubrication of the gearbox - dynamic balancing of the vertical support - locking and unlocking of the mobile crossbar on the baton guides The hydraulic components of the power plant are imported from ATOS ITALIA. The centralized lubrication systems from the crossbar and work supports are made with AZETA ITALIA components. The stroke limitation and safety systems are made with microswitch blocks from EUCHNER - GERMANY, which perform the following functions: - stopping at a fixed rate with confirmation in the rate display - protection against collisions and damage limits For turning flat surfaces at constant speed, the electrical equipment is provided with the function V = K of cutting at constant speed. The electrical panel and the mobile control desk are made with SIEMENS, EATON, SCHNEIDER components. The machine is automated with a programmable SIMATIC PLC S 7-300 from SIEMENS. Display of dimensions with measuring rulers for the vertical support and the lateral support for 2 + 2 axes.

Condition: new, Year of construction: 2025, functionality: fully functional, sweeping width: 530 mm, fuel type: electric, drive type: Elektro, Scrubber dryer Condition: New machine Hjdpfx Adsxl H U Ajdofb Technical condition: New Battery voltage: 24V Battery capacity: 180Ah Battery type: Gel Battery year: 2025 Battery condition: New Description: New machine with 12 months warranty

Condition: used, tires, solid rubber tires, forklift tires -Manufacturer: Continental, solid rubber tire CSE-Robust Super Elastic SC 10 -Tire size: 23 x 9-10 SC 10 RIM 6.50F -Bolt circle: Ø 162 x 20 mm -Recess: Ø 110 mm -Quantity: 1x tire available -Dimension: Ø 570 x 190 mm Hfodpfx Adour Ambsdeb -Weight: 56 kg

Condition: reconditioned (used), Year of construction: 2005, The refrigeration machine from "ers" is for sale; the device has been checked for functionality in a specialist workshop. Hjdpfxowb Sl Is Addsfb

Condition: excellent (used), functionality: fully functional, Year of construction: 2015, operating hours: 7,500 h, machine/vehicle number: 963, Universal Walking Vibropress for Multilayer Production: For efficient mass production of: - Small-format elements such as paving stones and blocks in multilayer production Hedpfx Adoxz Egcjdofb - Special elements such as curbstones, palisades, culverts, manhole rings, and relieving rings in single-layer production The machine is designed for the manufacture of large-scale vibropressed components. Production on vibrating table: Maximum production area: 1,240 mm x 1,000 mm Maximum product height: 650 mm Maximum product height in multilayer production: 250 mm Minimum product height in multilayer production (on pallet): 40 mm Maximum height (transportable) of multilayer package including pallet: 640 mm Production on the ground: Maximum production area: 1,240 mm x 1,240 mm Minimum product height: 250 mm Maximum product height: 1,200 mm

Condition: new, 1 brand-new hydraulic swing-cut guillotine shear (unused exhibition machine) Make: LAMI NOVA / Model: SC 2006 max. cutting length 2100 mm max. sheet thickness, for mild steel 6.5 mm max. sheet thickness, for VA 4 mm Cutting angle 1.5° throat 350 mm Cuts 29 / min. Drive power 7.5 kW Dimensions L x W x H approx. 2670 x 2000 x 1600 mm Weight 4500 kg Accessories / Special features: - NC control ELGO P 40 as electronic positioning display for the motorized backgauge, length = approx. 800 mm, ball screws - 1 heavy angle fence with tilting cams, 1000 mm - 2 heavy-duty support arms - Large projection of 350 mm for cutting off longer metal sheets - Central cutting gap adjustment - Cutting line lighting - Flat fixed cutting angle of 1.5° - Ball rollers in the table - Upper blade with 2 and lower blade with 4 cutting edges - Plastic feet for the hold-down device - Electric foot switch - Sheet metal chute at the rear Hfsdpfxjd Ad A Eo Addsb - Oil filling - Hydraulics BOSCH, DUPLOMATIK, REXROTH or OILCONTROL - Electric SIEMENS, TELEMECANIQUE - Operating instructions - CE-compliant Delivery time: immediately, subject to prior sale plus pre-freight costs China - Germany Exclusive representation! Siegfried Volz Machine Tools Rüschebrinkstr. 151-153 D - 44143 Dortmund - Wambel

Condition: new, Year of construction: 2024, New machine Year of manufacture 2024 Hjdpfxowb Eh No Addefb

Condition: like new (used), Year of construction: 2023, machine/vehicle number: KK00040333, cutting length (max.): 1,600 mm, cutting width (max.): 700 mm, cutting width at rip fence: 700 mm, cutting height (max.): 100 mm, saw blade diameter: 315 mm, height adjustment type: mechanical, overall weight: 277 kg, power: 4 kW (5.44 HP), Circular saw minimax sc 2 c compact, Cutting length max. 1,600 mm, Saw blade max. D = 315 mm, Cutting height max. 100 mm, (79 mm at 45°), Hfjdpfx Adst Epnlodsb max. cutting width at rip fence 700 mm, Extendable aluminum telescopic angle mitre fence, Motor 4 kW (S6), 400 Volt, 50 Hz, Saw blade speed 3,500 rpm, ex stock Seevetal, without transportation, Subject to prior sale,

Condition: used, Converter, power supply, power supply unit, switching power supply unit, power supply unit -Manufacturer: Siemens Schroff, power supply switching power supply -Type: Siemens 805 Schroff SC 8030 -Technical data: see nameplate photos -Dimensions: 290/135 / H65 mm Hjdpfsg S R Ttox Addjfb -Weight: 1.9 kg

Condition: good (used), Year of construction: 1991, cutting width (max.): 1,050 mm, cutting height (max.): 135 mm, saw blade diameter: 400 mm, height adjustment type: mechanical, overall weight: 930 kg, power: 5.5 kW (7.48 HP), Equipment: scorer, MAKA SC 3200 Sizing saw with scoring unit Hjdpfx Adjp H Tgbodsfb Manufacturer MAKA/Griggio Technical data: Trimming carriage 3200mm cutting length 3300mm Cutting width right from saw blade 1050mm saw blade max. 400mm cutting height 135mm Saw blade can be tilted 0-45°. cutting height at 45° = 90mm (400'er saw blade) motor 5,5 KW/400 Volt 3 speeds 3/4/6000 rpm motor scorer 0,75KW Scorer Ø 125mm suction connection 120mm wide and narrow protection hood dimensions 3250x3100x830mm Weight 922 KG

Condition: used, mileage: 1,107,601 km, power: 340 kW (462.27 HP), first registration: 07/2016, fuel type: diesel, empty load weight: 8,542 kg, overall weight: 20,500 kg, axle configuration: 2 axles, brakes: retarder, driver cabin: sleeper cab, gearing type: automatic, emission class: euro6, suspension: steel-air, number of beds: 2, number of seats: 2, Equipment: ABS, air conditioning, central locking, compressed air brake, cruise control, differential lock, onboard computer, parking heater, truck registration, DAF Space Cab, EURO6 | Automatic transmission, retarder, electric windows | Refrigerator, air conditioning | Multifunction steering wheel, cruise control | Parking heater, radio/CD, DTS | Differential lock | Subject to errors, input mistakes, and prior sale. Hfodpfxoxl D Iaj Addsb

Condition: new, 1 brand-new hydraulic swing-cut guillotine shears Make: LAMI NOVA / Exclusive agency! Model: SC 4006 max. cutting length 4100 mm max. sheet thickness, for mild steel 6 mm max. sheet thickness, for VA 4 mm Cutting angle 1.5° throat 350 mm Cuts 14 / min. Drive power 7.5 kW Dimensions L x W x H approx. 4630 x 2050 x 1700 mm Weight 9600 kg Accessories / Special features: - NC control ELGO P 40 as electronic positioning display for the motorized backgauge, length = approx. 800 mm, ball screws - 1 heavy angle fence with tilting cams, 1000 mm - 2 heavy-duty support arms - Large projection of 350 mm for cutting off longer metal sheets - Central cutting gap adjustment - Cutting line lighting - Flat fixed cutting angle of 1.5° - Ball rollers in the table - Upper blade with 2 and lower blade with 4 cutting edges - Plastic feet for the hold-down device - Electric foot switch - Sheet metal chute at the rear - Oil filling - Hydraulics BOSCH, DUPLOMATIK, REXROTH or OILCONTROL Hedjd Ad Dbepfx Addjfb - Electric SIEMENS, TELEMECANIQUE - Operating instructions - CE-compliant Fig.: with option! Delivery time: approx. 3 months after receipt of order plus pre-freight costs China - Germany Siegfried Volz Machine Tools Rüschebrinkstr. 151-153 D - 44143 Dortmund - Wambel

Condition: new, mileage: 5 km, power: 355 kW (482.67 HP), fuel type: diesel, overall weight: 26,000 kg, axle configuration: 3 axles, brakes: retarder, color: white, gearing type: automatic, emission class: euro6, total width: 2,550 mm, total height: 3,700 mm, loading space volume: 84 m³, loading space length: 7,750 mm, loading space width: 2,480 mm, loading space height: 2,200 mm, Year of construction: 2025, Equipment: ABS, air conditioning, electronic stability program (ESP), navigation system, soot filter, tail-lift, * Stationary air conditioning * Intarder * Liftable steering axle * Driveline Warranty Plus 3 years/300,000 km * With Orten Kettliner sliding curtain body system * Body certified for beverages and draft beer * Storage box for electric pallet truck optionally available * 4 rows of load securing tracks * 2,000 kg Bär tail lift * Large XF New Generation driver cab * Tyres: front + rear 385/55 R 22.5, middle 315/70 R 22.5 * Adaptive cruise control with FCW and AEBS * Lane departure warning system * Attention assist * Axle loads: 8,000 kg + 11,500 kg + 8,000 kg * Euro 6 * Automatic transmission * Sun visor * Luxury air suspension driver's seat * 42 l cooled compartment * 2 beds Hjdpfxspvp Uge Addofb * Glass roof hatch * Automatic climate control * 3.8 kW water-air stationary heater * Radio/USB * Full air suspension * Differential lock * Reversing camera ----suitable for this truck: * Tandem sliding curtain trailer * Orten Kettliner body * Certified for beverages and draft beer * 4 rows of load securing tracks * Full air suspension * SAF axles * Disc brakes * 2,000 kg Bär tail lift * Brand new

Condition: used, Power supply, converter, converter, power supply unit, Smart-UPS -Manufacturer: APC Smart-UPS SC 420 -Voltage: 220-240 V/50/60 Hz/2.3 A -Accessories: VA bracket -Dimensions: 375/130/H175 mm -Weight: 9.1 kg Hodpfxefmqz Ds Addjfb

Condition: used, mileage: 1,078,944 km, power: 340 kW (462.27 HP), first registration: 07/2016, fuel type: diesel, empty load weight: 8,512 kg, overall weight: 20,500 kg, axle configuration: 2 axles, brakes: retarder, driver cabin: sleeper cab, gearing type: automatic, emission class: euro6, suspension: steel-air, number of beds: 2, number of seats: 2, Equipment: ABS, air conditioning, central locking, compressed air brake, cruise control, differential lock, onboard computer, parking heater, truck registration, | DAF Space Cab, EURO6 | Automatic transmission, retarder, hydraulics, electric windows | Refrigerator, air conditioning | Multifunction steering wheel, cruise control | Auxiliary heating, radio/CD, DTS | Differential lock | Subject to error, input mistakes, and prior sale. Hedpsxl D H Nefx Addofb