Used Alzmetall Baz 35 for sale (127)

Condition: used, Year of construction: 1999, bore capacity in steel (diameter) 36 mm throat 300 mm bore stroke 160 mm 4 speeds 100 - 1600 U/min column diameter 145 mm table-size 500 x 370 mm total power requirement 2,2 kW weight 440 kg dimensions 1200 x 800 x 2300 mm comes from a vocational school Features: - automatic feed - infinitely variable speed control - digital speed display - adjustable drilling depth stop Kjdpfsvzt Dyox Addsll - drill spindle guard

Condition: used, bore capacity in steel (diameter) 45 mm throat 350 mm bore stroke 180 mm 4 speeds 30 - 765 U/min table-size 720 x 560 mm total power requirement 3,4 kW weight 950 kg Kodpfjvuz Tvox Addell dimensions 1200 x 800 x 2300 mm Features: - Automatic feed - Coolant system - Infinitely variable speed control - Adjustable fixed depth stop - Emergency stop foot switch - Drill chuck

Condition: used, Column drilling machine Kjdpfx Adsx Ttunodjll - Capacity: 40 mm - Morse taper 4 - Automatic feed - Variable spindle speed: 50-1280 rpm - Spindle stroke: 180 mm - Table: 720x560 mm - Column diameter: 160 mm - Throat depth: 340 mm - Coolant system - Workpiece vise

Condition: used, Column drilling machine ALZMETALL type AB 4 SV Machine no. No. 14805 Year of construction approx. 1980 drilling capacity 40 mm Spindle holder MK 4 - short quill throat 340 mm Quill stroke 180 mm Table size 710 x 560 mm Column diameter 160 mm Spindle speed 30 - 765 rpm infinitely variable Motor power 2.3 and 3.4 kW pole-changing Mains connection 380 Volt, 50 Hz - Spindle speed via 2 motor speeds and infinitely variable via variator gearbox - Reduction gear with 2 gear stages for high torque at low speeds - Spindle on/off via rotary switch or electric foot switch - Automatic feed 0.1 - 0.2 - 0.3 mm/rev - Table height adjustment via hand crank - Machine base with machined workpiece support surface - LED lighting device Space requirement L x W x H 1200 x 725 x 2050 mm Weight 615 kg good condition Ksdpfx Aon N Ekcjddjll

Condition: used, Column Drilling Machine ALZMETALL Type AB 3 ESV Machine No. 15967 Year of manufacture 1977 Drilling capacity: 32 mm Spindle taper: MT 3 – short quill Distance spindle nose – table: 545 mm (short quill) Distance spindle adapter – table: 395 mm (MT adapter) Throat: 290 mm Quill stroke: 160 mm Table size: Ø 545 mm Column diameter: 220 mm Spindle speed: 55 – 1450 rpm, stepless Motor power: 1 / 1.6 kW Supply voltage: 380 Volt, 50 Hz - Spindle speed via 2 gearbox stages, 2 motor speeds and stepless through variable-speed drive - Intermediate gear stage for high torque at low speeds - MT adapter from MT3 to MT4 - Automatic feed 0.1 – 0.2 – 0.3 mm/rev - Swiveling drill table - Table height adjustment via hand crank - Heavy machine base with machined workpiece support surface (not original Alzmetall) - Work area lighting Kljdpfx Asharwvoddel Space required (L x W x H): 1150 x 650 x 2000 mm Weight: 850 kg Good condition

Condition: new, bore capacity in steel (diameter) 18.0 mm throat 190 mm bore stroke 80 mm morse taper 2 Kurzspindel MK turning speeds 225 - 4.300 U/min voltage 400 / 50 Hz Volt Ksdpfx Adexaay Ujdjll table: 300 x 240 mm column diameter 65 mm engine output 0.37 / 0.55 kW weight 110 kg Furnishing: - Large spindle speed range - stepless speed adjustment - machined base plate - Electrically secured spindle protection - Main switch lockable with motor protection switch - Reversing switch for clockwise and counterclockwise rotation - Operating instructions in German

Condition: new, bore capacity in steel (diameter) 40.0 mm throat 293 mm bore stroke 120 mm morse taper 3 MK table: 515 x 360 mm turning speeds 80 - 1125 U/min column diameter 115 mm thread M 24 ST60 thread M 30 GG20 feed 0.10 + 0.20 mm/U distance spindle /table 117 / 701 mm engine output 1.0 / 1.6 kW weight 270 kg Machine height 1840 mm NEW ALZMETALL MODEL RANGE 7 "TFT - LCD display with touch function: * Spindle speed setpoint * Actual speed display * Integrated drilling depth display * with touch zero point transfer * Virtual drilling depth scale in the display * Machine status displays and warnings in the display * Service information * Selectable user language: DE / EN / FR / ES / IT / NL / RU. Furnishing: - Thread cutting device * for thread cutting with a stop * max. 6 threads / min (thread cutting performance depends on the spindle speed) * Thread depth adjustable via depth stop * in the TFT - LCD display (3 tools). - Infinitely variable speed setting by means of an adjusting lever - automatic spindle feed with feed overload protection - Spindle protection with electrical fuse Klsdpfxoxabyie Addsl - Three separate buttons for clockwise rotation - counterclockwise rotation - stop - Mushroom pushbutton (latching) for EMERGENCY STOP - Main switch, lockable - Right and left rotation by contactor control - Control voltage 24 volts - Protection class IP 54 - Paint: DD textured paint signal white RAL 9003, PANTONE 7545c, black - Machine oil first filling: oil bottle, loose delivery including special accessories: - 25. Coolant system B.

Condition: new, bore capacity in steel (diameter) 40.0 mm throat 293 mm bore stroke 120 mm morse taper 3 MK table: 515 x 360 mm turning speeds 160 - 2250 U/min column diameter 115 mm feed 0.10 + 0.20 mm/U T-slots 2 x 14 x 224 mm distance spindle /table 117 / 701 mm engine output 1.45 / 1.90 kW weight 285 kg Machine height 1840 mm NEW ALZMETALL MODEL RANGE 7 "TFT - LCD display with touch function: * Spindle speed setpoint * Actual speed display * Integrated drilling depth display * with touch zero point transfer * Virtual drilling depth scale in the display * Machine status displays and warnings in the display * Service information * Selectable user language: DE / EN / FR / ES / IT / NL / RU. Furnishing: - Infinitely variable speed setting by means of an adjusting lever - automatic spindle feed with feed overload protection - Spindle protection with electrical fuse - Three separate buttons for clockwise rotation - counterclockwise rotation - stop - Mushroom pushbutton (latching) for EMERGENCY STOP - Main switch, lockable - Right and left rotation by contactor control - Control voltage 24 volts - Protection class IP 54 - Painting: DD textured paint, signal white RAL 9003 PANTONE 7545c, black including special accessories: - 25. Coolant system B. Klodpoxab Rhsfx Addjl

Condition: new, bore capacity in steel (diameter) 55.0 mm throat 300 mm bore stroke 140 mm morse taper 4 MK table: 615 x 430 mm turning speeds 70 - 1200 U/min column diameter 145 mm thread M 30 ST60 thread M 36 GG20 feed 0.10 + 0.30 mm/U distance spindle /table 150 / 735 mm engine output 1.8 / 2.9 kW weight 380 kg Machine height 1850 mm NEW ALZMETALL MODEL RANGE 7 "TFT - LCD display with touch function: * Spindle speed setpoint * Actual speed display * Integrated drilling depth display * with touch zero point transfer * Virtual drilling depth scale in the display * Machine status displays and warnings in the display * Service information * Selectable user language: DE / EN / FR / ES / IT / NL / RU. Furnishing: - Thread cutting device * for thread cutting with a stop * max. 6 threads / min (thread cutting performance depends on the spindle speed) * Thread depth adjustable via depth stop * in the TFT - LCD display (3 tools). - automatic spindle feed with feed overload protection - Infinitely variable speed setting by means of an adjusting lever - Spindle protection with electrical fuse - Three separate buttons for clockwise rotation - counterclockwise rotation - stop - Mushroom pushbutton (latching) for EMERGENCY STOP Klodpfx Adjxabn Tjdsl - Main switch, lockable - Right and left rotation by contactor control - Control voltage 24 volts - Protection class IP 54 - Painting: DD textured paint signal white RAL 9003, PANTONE 7545c, black - Machine oil first filling: oil bottle, loose delivery including special accessories: - 12. LED machine light - 24. Coolant system A * in the machine base

Condition: used, Year of construction: 1975, bore capacity in steel (diameter) 35.0 mm bore capacity in cast iron 40.0 mm throat 300 mm bore stroke 180 mm turning speeds 65 - 1750 U/min table-size 425 x 500 mm column diameter 155 mm feed 0.1-0.2-0.3 m/min spindle taper MT 4 MK engine output 0.9 / 1.5 kW weight 450 kg range L-W-H 800 x 650 x 1850 mm Machine from a vocational school good / well-maintained condition (!!) Kedjxabuaspfx Addoll Equipment: - robust motor-driven pillar drill with VARIO drive (V-belt) - electro-automatic spindle feed - pole-changing motor - stepless speed adjustment (VARIO drive) - adjustable drilling depth stop - machine table with 2x T-slots * height adjustable via hand crank - 1x used machine vice - machined base plate - coolant device - connection cable + connection plug - original operating instructions

Condition: new, bore capacity in steel (diameter) 30.0 mm throat 293 mm bore stroke 140 mm morse taper 3 MK table: 515 x 360 mm turning speeds 225 - 4300 U/min column diameter 115 mm distance spindle /table 132 / 724 mm engine output 1.0 / 1.6 kW weight 260 kg Machine height 1790 mm NEW ALZMETALL MODEL RANGE 7 "TFT - LCD display with touch function: * Spindle speed setpoint * Actual speed display * Integrated drilling depth display * with touch zero point transfer * Virtual drilling depth scale in the display * Machine status displays and warnings in the display * Service information * Selectable user language: DE / EN / FR / ES / IT / NL / RU. Furnishing: - Infinitely variable speed setting by means of an adjusting lever - Spindle protection with electrical fuse - Three separate buttons for clockwise rotation - counterclockwise rotation - stop - Mushroom pushbutton (latching) for EMERGENCY STOP - Main switch, lockable - Right and left rotation by contactor control - Control voltage 24 volts - Protection class IP 54 - Painting: DD textured paint, signal white RAL 9003 PANTONE 7545c, black Kodpfx Adoxaap Aodsll

Condition: new, bore capacity in steel (diameter) 40.0 mm bore capacity in cast iron 45.0 mm throat 300 mm bore stroke 160 mm morse taper 4 MK table: 615 x 430 mm turning speeds 100 - 1800 U/min column diameter 145 mm thread M 24 ST60 thread M 30 GG20 feed 0.1-0.2-0.3-0.4 mm/U distance spindle /table 138 / 688 mm engine output 1.4 / 2.2 kW weight 470 kg Machine height 1865 mm NEW ALZMETALL MODEL RANGE 7 "TFT - LCD display with touch function: * Spindle speed setpoint * Actual speed display * Integrated drilling depth display * with touch zero point transfer * Virtual drilling depth scale in the display * Machine status displays and warnings in the display * Service information * Selectable user language: DE / EN / FR / ES / IT / NL / RU. Furnishing: - Thread cutting device * for thread cutting with a stop * max. 6 threads / min (thread cutting performance depends on the spindle speed) * Thread depth adjustable via depth stop * in the TFT - LCD display (3 tools). - Infinitely variable speed setting by means of an adjusting lever - Electromagnetic feed clutch * with overload protection and electrical * Comfort cross-handle switch * Feed rates selectable 0.1-0.2-0.3-0.4 mm / rev - Spindle protection with electrical fuse - Three separate buttons for clockwise rotation - counterclockwise rotation - stop - Mushroom pushbutton (latching) for EMERGENCY STOP - Main switch, lockable - Right and left rotation by contactor control - Control voltage 24 volts - Protection class IP 54 - Paint: DD textured paint signal white RAL 9003, PANTONE 7545c, black - Machine oil first filling: oil bottle, loose delivery Klsdpfjxab Nksx Addjl including special accessories: - 12. LED machine light - 24. Coolant system A * in the machine base

Condition: new, bore capacity in steel (diameter) 40.0 mm throat 293 mm bore stroke 120 mm morse taper 3 MK table: 515 x 360 mm turning speeds 160 - 2250 U/min column diameter 115 mm thread M 24 ST60 thread M 30 GG20 feed 0.10 + 0.20 mm/U distance spindle /table 117 / 701 mm engine output 1.0 / 1.6 kW weight 270 kg Machine height 1840 mm NEW ALZMETALL MODEL RANGE 7 "TFT - LCD display with touch function: * Spindle speed setpoint * Actual speed display * Integrated drilling depth display * with touch zero point transfer * Virtual drilling depth scale in the display * Machine status displays and warnings in the display * Service information * Selectable user language: DE / EN / FR / ES / IT / NL / RU. Furnishing: Klsdpoxab Nwofx Addel - Thread cutting device * for thread cutting with a stop * max. 6 threads / min (thread cutting performance depends on the spindle speed) * Thread depth adjustable via depth stop * in the TFT - LCD display (3 tools). - Infinitely variable speed setting by means of an adjusting lever - automatic spindle feed with feed overload protection - Spindle protection with electrical fuse - Three separate buttons for clockwise rotation - counterclockwise rotation - stop - Mushroom pushbutton (latching) for EMERGENCY STOP - Main switch, lockable - Right and left rotation by contactor control - Control voltage 24 volts - Protection class IP 54 - Paint: DD textured paint signal white RAL 9003, PANTONE 7545c, black - Machine oil first filling: oil bottle, loose delivery including special accessories: - 25. Coolant system B.

Condition: used, Year of construction: 1995, Technical details: bore capacity in steel (diameter): 32 mm throat: 293 mm Klsdox U Dkcspfx Addjl bore stroke: 120 mm bore capacity in St 60 - full boring: 40 mm bore capacity in cast iron: Ø 38 mm spindle taper MT: MK 3 spindle throat: 293 mm spindle speed:: 160 - 2250 / seples U/min feed: 0,10 - 0,20 / manuell+automatisch mm/U Distance spindle/table max.: 55 - 642 mm table clamping surface:: 300 x 300 mm drill table adjustment: ja mm column diameter: 115 mm distance spindle center to floor plate:: 1207 mm total power requirement: 1,9 kW weight of the machine ca.: 280 kg dimension machine xH: 0,7 x 1,0 x 1,9 m

Year of construction: 2023, condition: new, machine/vehicle number: PRJ065955, ALZMETALL bench drill drilling capacity in steel 12mm Drill chuck mounting B16 outer taper, spindle stroke: 40mm, throat: 200mm, column diameter: 50mm, machine table usable support: 300x240mm, with T-slots 2 x 12mm x 80mm, distance spindle-base plate min./max. 110/250, feed by hand, machine height without options: 670mm, net weight: 64 kg. - Speed infinitely variable 250-5000 rpm Standard equipment: 5" TFT - LCD display with touch function: manual input spindle speed setpoint, speed display actual value, integrated drilling depth display with touch zero point acceptance, virtual drilling depth scale in display, machine status indicators and warnings in display, service information, selectable operating language DE/EN/FR/ES/IT/NL/RU. Kedpfxslub Rds Addoll AC motor 230 Volt, 50 Hz, Connector plug ready mounted, Cable length 2m, Three separate buttons for clockwise - anticlockwise - stop, spindle stop by brake function, spindle protection with electrical fuse, main switch lockable, mushroom pushbutton (latching) for EMERGENCY STOP, speed adjustment infinitely variable by means of potentiometer, protection class IP54, spindle protection with electrical fuse, paint finish: DD structure paint signal white RAL 9003, PANTONE 7545c, black incl. the following options: LED machine light pos. 12. Delivery time: ex stock Waiblingen Beinstein

Condition: new, Year of construction: 2024, ALZMETALL column drilling machine AB 34 iTRONIC drilling capacity in steel 34mm, spindle speed: 100-1800 rpm, Short spindle MK4, spindle stroke: 160mm, throat depth: 300mm, column diameter: 145mm, machine table usable support: 615x430mm, with T-slots 2 x 14mm x 224mm, distance spindle-table min. / max. 138/688mm, machine table height adjustment via hand crank, feeds 0.1-0.2-0.3-0.4 mm/rev, machine height without options: 1865mm, net weight: 470 kg. Standard equipment: 7" TFT LCD display with touch function Thread cutting device Infinitely variable speed adjustment Spindle protection Three separate buttons for clockwise rotation - counterclockwise rotation - stop Mushroom push button Main switch Clockwise and counterclockwise rotation Control voltage 24 Volt Protection class IP 54 Motor insulation class "F" (155°) Electromagnetic feed overload protection Machine oil initial filling Paint finish: DD textured paint signal white RAL 9003, PANTONE 7545c, black incl. the following options: LED machine light Pos. 12. Coolant system A Pos. 24 Foot switch for thread cutting Pos. 20.5 Kedpfx Ajiqyixjddsll Delivery time: ex stock Waiblingen Beinstein The machine can be viewed at our premises by prior arrangement.

Condition: new, Year of construction: 2023, machine/vehicle number: PRJ065958, ALZMETALL bench drilling machine drilling capacity in steel 16mm Klsdpfolubw Isx Addel Short spindle MK2, spindle stroke: 80mm, throat: 190mm, column diameter: 65mm, machine table usable support: 300x240mm, with T-slots 2 x 12mm x 80mm, distance spindle-table min./max. 75/357mm, machine table height adjustment via hand crank, machine table base plate, usable support: 300x240mm, with T-slots 2 x 12mm x 80mm, distance spindle-base plate min. / max. 437/437mm, feed by hand, machine height without options: 825mm, net weight: 83 kg. - Speed infinitely variable 100-2000 rpm Standard equipment: 5" TFT - LCD display with touch function: manual input spindle speed setpoint, speed display actual value, integrated drilling depth display with touch zero point acceptance, virtual drilling depth scale in the display, machine status indicators and warnings in the display, service information, selectable operating language DE/EN/FR/ES/IT/NL/RU. AC motor 230 Volt, 50 Hz, Connector plug ready mounted, Cable length 2m, Three separate buttons for clockwise - anticlockwise - stop, spindle stop by brake function, spindle protection with electrical fuse, main switch lockable, mushroom pushbutton (latching) for EMERGENCY STOP, speed adjustment infinitely variable by means of potentiometer, protection class IP54, spindle protection with electrical fuse, paint: DD structure paint signal white RAL 9003, PANTONE 7545c, black incl. the following options: LED machine light pos. 12. Delivery time: ex stock Waiblingen Beinstein

Condition: new, ALZMETALL pillar drilling machine drilling capacity in steel 30mm Short spindle MK3, spindle stroke: 140mm, throat: 293mm, column diameter: 115mm, machine table usable support: 514x360mm, with T-slots 2 x 14mm x 224mm, distance spindle-table min./max. 132/724mm, machine table height adjustment by hand crank, feed by hand, machine height without options: 1790mm, net weight: 260 kg. - Speed infinitely variable 100-1800 rpm Standard equipment: Mushroom pushbutton (latching) for EMERGENCY STOP, reversing switch for clockwise and anti-clockwise rotation, motor protection switch, speed adjustment stepless, speed display digital, protection class IP54, spindle protection with electrical fuse, painting: DD-structure paint signal white RAL 9003, PANTONE 7545c, black incl. the following options: LED machine light pos. 12. Kljdpfx Aoid I Ixsddel Delivery time: ex stock Waiblingen Beinstein

Condition: good (used), Drill, pillar drill, column drill, column drill -Manufacturer: Alzmetall, pillar drilling machine type AB5/S -Engine: VKS 3 kW -Speed: 40 - 800 rpm, continuously variable right-left rotation -Feed: 0.1 - 0.14 - 0.2 - 0.28 - 0.4 mm/rev. -Table size: Ø 500 mm, travel 470 mm -Spindle holder: MK5 -Spindle stroke: 240 mm Klodper Ngp Uofx Addjl -Projection: 380 mm -Column Ø: 220 mm -Dimensions: 1450/680/H2160 mm -Weight: 1262 kg

Condition: excellent (used), functionality: fully functional, Data: Klodpfsybbbwjx Addsl Tool holder MK 5--- Drilling capacity with ST60 50 mm--- Infinitely variable speed ranges approx. 40 - 180 rpm + 180 - 800 rpm--- 5 feeds 0.1 / 0.14 / 0.2 / 0.28 / 0.4 mm/rev--- Table surface, 880 x 670 mm--- throat depth: 385 mm---

Condition: used, Year of construction: 1979, Drilling capacity: 35 mm Mounting type: MK 4 Klsdpjbn R Alofx Addjl Feed rate: 0.04, 0.07, 0.10 ,0.14, 0.26, 0.40 Speeds: 63, 125, 180, 250, 355, 500, 710, 1400 Digital display in Z: 720 mm Cross table:x= 460 y= 280 mm drilling capacity in GG 20: 45 mm with cam control Cross table

Condition: used, bore capacity in steel (diameter) 40 mm throat 345 mm bore stroke 180 mm spindle turning speed range 25-640 U/min column diameter 180 mm table-size Ø ca. 560 mm surface area Ø 445 mm feeds 0,1; 0,2; 0,3 mm/U spindle taper MT 4 weight of the machine ca. 1 t dimensions ca. 650 x 1000 x 2100 mm with thread cutting device foot switch With coolant device in the base Klsdpfx Adsx Iwgqedjl steplessly variable speeds, 2 gear stages, and 2 motor speeds

Condition: new, functionality: fully functional, Drilling capacity in St 60: 40 mm Tapping capacity in St 60: M 24 Tapping capacity in GG 20: M 30 Spindle speeds - stepless: 160-2250 rpm Short taper spindle: MT 3 Spindle stroke: 120 mm Throat: 293 mm Column diameter: 115 mm Machine table - usable surface: 515x360 mm Distance spindle/table min./max.: 117/701 mm T-slots number - width - spacing: 2 x 14 x 224 mm Klodpfx Adjx Sq A Tjdel Feed: 0.1 + 0.2 mm/rev Machine height: 1840 mm Standard equipment: - Main switch with lockable motor protection circuit breaker - Mushroom-head emergency stop button (latching) - Infinitely variable speed adjustment - Digital speed display - Feed overload protection - Protection class IP 54 - Terminal block in control cabinet (no connecting cable) - Spindle guard with electrical interlock Optional equipment: Pos. 12 LED machine light with radially adjustable light beam, connection rating 230 V, protection class IP65 Pos. 20.1 Thread cutting device with foot switch, for tapping with end-stop, max. 6 threads/min. (thread cutting capacity depends on spindle speed) Pos. 25 Coolant system B, consisting of: separate tank (33 l), pump with motor protection circuit breaker, complete fittings Pos. 37.1 Digital drilling depth indicator Zero point setting (drilling start), 5-digit LED display, character height 13 mm

Condition: new, functionality: fully functional, Drilling capacity in steel St 60: 25 mm Drilling capacity in cast iron GG 20: 30 mm Boring capacity in St 60: 30 mm Thread cutting in ST 60: M 16 Thread cutting in GG 20: M 20 Short spindle: MK 3 Spindle stroke: 140 mm Throat: 293 mm Column diameter: 115 mm Machine table – usable surface: 514 x 360 mm T-slot quantity – width – spacing: 2 x 14 x 224 mm Distance spindle-table min./max.: 132 / 724 mm Feed: manual Spindle speeds – stepless: 100 – 1,800 rpm Total power requirement: 1.0/1.6 kW Machine weight approx.: 260 kg Klsdsx Sqt Sopfx Addjl Standard equipment: - Mushroom pushbutton (latching) for emergency stop - Reversing switch for clockwise and counterclockwise rotation - Motor protection switch - Stepless speed adjustment - Digital speed display - Protection class IP 54 - Plug connector (pre-installed) - Spindle guard with electrical interlock - Paint finish: DD textured varnish signal white RAL 9003, Pantone 7545c, black Special equipment: Pos. 12 LED machine lamp with radially adjustable light beam, connection power 230 V, protection class IP65

Condition: new, functionality: fully functional, Drilling capacity in St 60 40 mm Thread cutting in St 60 M 24 Thread cutting in GG 20 M 30 Short spindle MK 3 drilling stroke 120 mm throat 293 mm column diameter 115 mm machine table - usable support 514x360 mm T-slots number - width - distance 2 x 14 x 224 mm distance spindle-machine table min./max. 117/701 mm Kledpfx Adjifkpwedsl feed rate 0,10 + 0,20 mm/rev. spindle speeds 160-2,250 rpm Total power requirement 1.45/1.9 kW machine height 1840 mm Machine weight approx. 285 kg Standard equipment: - Mushroom pushbutton (latching) for EMERGENCY STOP - Reversing switch for right/left rotation - motor protection switch - Speed adjustment stepless - digital speed display - feed overload protection - protection class IP 54 - Connector plug (ready mounted, cable length 2 m) - Spindle protection with electrical fuse