Kk-Industries Cyl-St 170-25/5.0 nakup rabljenega (57.102)

Stanje: novo, Bending length: 2600 mm Sheet thickness: 5 mm Upper roller diameter: 170 mm Technical specifications: - Rear roller powered by motor - Cone bending device - Hardened and polished rollers - Entire frame made of St 52 steel - Asymmetric design for perfect bending results - Upper and lower rollers driven by brake motors and planetary gearbox - Portable control panel - In compliance with CE standards Options: - Lower roller driven by electric motor: EUR 1,650 - Digital display for rear roller position: EUR 1,010 - Extended rollers: EUR 966 - Profile rollers: EUR 1,190 Kjdpod Ab Nnofx Aczonb We have numerous references!

Stanje: novo, Bending length: 2100 mm Sheet thickness: 6 mm Upper roll diameter: 170 mm Technical data: - Rear roll motorized drive - Cone bending device - Hardened and polished rolls - Entire frame made of St 52 steel - Asymmetric design for perfect bending Kedpfx Ajd Ab Npoczsnb - Top and bottom rolls driven by brake electromotors and planetary gears in the gearbox - Portable control console - In compliance with CE standards Options: - Bottom roll driven by electric motor EUR 1,650 - Digital display for rear roll position EUR 1,010 - Extended rolls EUR 966 - Profile rolls EUR 1,190 We have numerous references!

Stanje: novo, Bending length: 2,600 mm Sheet thickness: 6 mm Upper roll diameter: 190 mm Sheet length: 2,600 mm Technical data: Kodpfod Ab Nkex Aczonb - Rear roll motorized - Conical bending device - Hardened and polished rolls - Entire frame made of St 52 steel - Asymmetric design for perfect bending - Upper and lower rolls driven by brake electromotors and planetary gears in the gearbox - Portable control panel - In compliance with CE standards Options: - Lower roll driven by electric motor EURO 1,925 - Digital display for rear roll position EURO 1,010 - Extended rolls EURO 966 - Profile rolls EURO 1,190 We have numerous references!

Stanje: novo, Dolžina upogibanja: 3100, Debelina pločevine: 4, Premer zgornjega valja: 170 Standardne lastnosti: Zadnji valj z motorjem Naprava za stožčasto upogibanje Kaljeni in polirani valji Ohišje iz jekla ST 52 Zgornji valj se po upogibanju bočno odpira za lažje odstranjevanje materiala Asimetrična zasnova za popolno upogibanje Knedpjd Ab Nmofx Aczjb Za popoln rezultat sta zgornji in spodnji valj gnana z elektromotorjem z zavoro in planetnim zobniškim pogonom Ustreza CE-standardom Prenosna upravljalna konzola za upravljanje stroja z različnih mest OPTIONALNO EnotaKos Neto cena (€) Spodnji valji z motorjem1 1.205 € Digitalni prikazovalnik za zadnji valj1 815 € Podaljšani valji1 788 €

Stanje: novo, Bending length: 1600 mm Knsded Ab Nqjpfx Aczob Sheet thickness: 8 mm Top roller diameter: 170 mm Technical Data: - Back roller driven by motor - Cone bending device - Hardened and polished rollers - Entire frame made from St 52 steel - Asymmetric design for perfect bending results - Top and bottom rollers driven by brake electromotors and planetary gearboxes - Portable control desk - In compliance with CE standards Options: - Bottom roller driven by electric motor: EUR 1,650 - Digital display for back roller position: EUR 1,010 - Extended rollers: EUR 966 - Profile rollers: EUR 1,190 We have numerous references!

Stanje: novo, Bending length: 2600 mm Sheet thickness: 7 mm Top roller diameter: 200 mm Technical data: - Back roller motorized - Cone bending device - Hardened and polished rollers - Entire body made of St 52 steel - Asymmetrical design for perfect bending Kjdpfx Aod Ab Ngoczonb - Top and bottom rollers driven by brake electric motors and planetary gearboxes within the transmission - Portable control panel - In compliance with CE standards Options: - Bottom roller driven by electric motor: EURO 2,200 - Digital display for rear roller position: EURO 1,010 - Extended rollers: EURO 966 - Profile rollers: EURO 1,190 We have numerous references!

Stanje: novo, Bending length: 3100 mm Sheet thickness: 5 mm Top roll diameter: 190 mm Technical specifications: - Rear roll motor-driven - Cone bending device - Hardened and polished rolls - The entire frame is made of St 52 steel Knjdpfx Ajd Ab Nieczjb - Asymmetric design for perfect bending - Top and bottom rolls driven by brake electric motors and planetary gearboxes - Portable control panel - In compliance with CE standards Options: - Bottom roll driven by electric motor EURO 1,925.00 - Digital display for rear roll position EURO 1,010.00 - Extended rolls EURO 966.00 - Profile rolls EURO 1,190.00 We have a large number of references!

Stanje: novo, Bending length: 2600 mm Sheet thickness: 4 mm Top roller diameter: 140 mm Sheet length: 2,600 mm Technical Data: - Rear roller driven by motor - Cone bending device - Hardened and polished rolls - Entire frame made of St 52 steel - Asymmetric design for perfect bending - Top and bottom rolls driven by brake electric motors and planetary gearbox Knsdpfxod Ab Nrs Aczsb - Portable control panel - Complies with CE standards Options: - Bottom roll driven by electric motor EURO 1,513 - Digital display for rear roller position EURO 1,010 - Extended rolls EURO 966 - Profile rolls EURO 1,190 We have numerous references!

Leto izdelave: 2016, stanje: rabljeno, KK PULLTESTER KKP03A / Series 6 Year of manufacture: 2016 The KK Pulltester is a testing device for quality assurance in the graphic arts industry. It precisely measures the adhesive bond strength of individual pages in catalogues, paperbacks, magazines, brochures, and books. The number of pages to be tested, page number, job number, and book block length are programmed before the measurements. Technical specifications: Language: German Book block width: approx. 5 - 35 cm Book block length: approx. 7 - 40 cm Knodswcd Iqopfx Aczjb Book block thickness: approx. 7 cm

Stanje: novo, Press force: 63 t Bending length: 2500 mm Distance between uprights: 1980 mm Motor: 11 kW Ram stroke (max.): 150 mm Opening width: 400 mm CNC Press Brake KK Industries 63x2500, 4 axes Y1-Y2-Y-X-R with CNC Crowning Technical Specifications: Pressing force: 63 t Bending length: 2500 mm Distance between columns: 1980 mm Throat depth: 300 mm Ram stroke: 150 mm Maximum opening: 400 mm Ram approach speed: 180 mm/s Ram return speed: 170 mm/s Ram working speed: 14 mm/s Main motor output: 11 kW CNC system: ZY68 Number of controlled axes: 4+1 Oil tank capacity: 150 L Back Gauge: X-axis: X-axis travel: 600 mm X-axis speed: 200 mm/s Positioning accuracy: ±0.10 mm Repeat positioning accuracy: ±0.015 mm Motor power: 0.85 kW R-axis: R-axis travel: 150 mm R-axis speed: 100 mm/s Positioning accuracy: ±0.10 mm Repeat positioning accuracy: ±0.015 mm Dimensions and Weight: Length: 2750 mm Width: 1350 mm Height: 2320 mm Knsdpjv Trgqsfx Aczjb Weight: 4000 kg

Stanje: novo, Bending length: 1050 mm Sheet thickness: 5 mm Top roller diameter: 110 mm Technical specifications: - Rear roller motor-driven - Conical bending device - Hardened and polished rollers - Entire body constructed from St 52 steel - Main drive motor with brake system - Top and bottom rollers driven by electric motor, gearbox, and transmission system - Portable control panel - Cast iron frame - Manual adjustment of rear and lower rollers - Compliant with CE standards Knedpod Ab N Hjfx Aczjb Options: - Top roller driven by electric motor: EUR 1,166 - Digital display for rear roller position: EUR 1,010 - Hardened rollers: EUR 725 - Special voltage: EUR 480 - Material feed table - Bottom roller driven by electric motor We have numerous references!

Stanje: novo, Bending length: 2100 mm Sheet thickness: 8 mm Top roll diameter: 200 mm Technical specifications: Kjdpod Ab Nhofx Aczenb - Rear roll driven by motor - Cone bending device - Hardened and polished rolls - The entire frame is made of St 52 steel - Asymmetric design for perfect bending - Top and bottom rolls driven by brake electric motors and planetary gears in the gearbox - Mobile control panel - In compliance with CE standards Options: - Bottom roll driven by electric motor EUR 2,200 - Digital display for rear roll position indication EUR 1,010 - Extended rolls EUR 966 - Profile rolls EUR 1,190 We have numerous references!

Stanje: novo, Bending length: 1600 mm Sheet thickness: 6 mm Top roller diameter: 140 mm Technical data: - Rear roller powered by motor - Cone bending device - Hardened and polished rollers - Entire frame made of St 52 steel - Asymmetric design for perfect bending - Top and bottom rollers driven by brake electric motors and planetary gearboxes - Portable control panel - In compliance with CE standards Options: - Bottom roller powered by electric motor EURO 1,512,-- Kjdsd Ab Ntepfx Aczonb - Digital display for rear roller position EURO 1,010,-- - Extended rollers EURO 966,-- - Profile rollers EURO 1,190,-- We have a large number of references!

Stanje: zelo dobro (rabljeno), For sale: professional Schneider Electric Masterpact NW25 H1 circuit breaker with Micrologic 5.0 A protection unit. This device is used in industrial power distribution systems—low-voltage switchboards, manufacturing plants, industrial halls, and energy installations. The Masterpact NW series circuit breakers are designed for demanding industrial environments and provide reliable protection for installations against overloads and short circuits. Device is in very good visual and technical condition—the exact state can be seen in the photos. Technical data: Knedpfxoyua Amj Aczsb Manufacturer: Schneider Electric Series: Masterpact NW Model: NW25 H1 Protection unit: Micrologic 5.0 A Rated current: 2500 A Insulation voltage: Ui 1000 V Impulse withstand voltage: Uimp 12 kV Operational voltage: up to 690 V AC Breaking capacity Icu: 65 kA Ics: 100% Icu Standard: IEC 60947-2 Frequency: 50 / 60 Hz Utilization category: AC23A Year of manufacture: 2011 Assembly: Schneider Electric Venray (Netherlands) The circuit breaker provides protection against overload and short-circuit and allows for adjustable protection parameters thanks to the Micrologic unit. Applications: - Low-voltage switchboards - Industrial plants - Power installations - Power distribution systems - Large machinery and production lines ✔ Robust industrial design ✔ High short-circuit breaking capacity ✔ Adjustable Micrologic protection ✔ Equipment from the renowned manufacturer Schneider Electric

Stanje: novo, Bending length: 2100 mm Sheet thickness: 7 mm Top roller diameter: 190 mm Technical specifications: - Rear roller driven by motor Knodpfx Ajd Ab Nleczjb - Cone bending device - Hardened and polished rollers - The entire frame made of St 52 steel - Asymmetric design for perfect bending - Top and bottom rollers driven by brake electric motors and planetary gears in the gearbox - Portable control panel - In compliance with CE standards Options: - Bottom roller driven by electric motor EURO 1,925 - Digital display for rear roller position EURO 1,010 - Extended rollers EURO 966 - Profile rollers EURO 1,190 We have numerous references!

Stanje: novo, Bending length: 3100 mm Sheet thickness: 6 mm Top roll diameter: 200 mm Technical specifications: - Rear roll motorized drive - Cone bending device - Hardened and polished rolls - Complete frame made of St 52 steel - Asymmetric design for perfect bending - Top and bottom rolls driven by brake electric motors and planetary gearboxes - Portable control panel - Compliant with CE standards Options: - Bottom roll driven by electric motor: EUR 2,200 - Digital display for rear roll position: EUR 1,010 - Extended rolls: EUR 966 - Profile rolls: EUR 1,190 We have numerous references! Ksded Ab Nfjpfx Aczjnb

Stanje: novo, Pressure: 125Motor: 22Installation height: 500Stroke length (max.): 400Table size: 800 x 600 x 120Ram area: 800 x 600 x 300Table height: 850Dimensions (LxWxH): 1,600 x 2,000 x 3,200Weight approx.: 7,000Oil fill: 400Control / Key switch: 1. Setup mode Manual without light sensor (max. 10 mm/sec. speed) 2. Automatic (at full speed) with light sensor Main cylinder: Ø 220 mm Knsdomr Hpcjpfx Aczob Auxiliary cylinders: 2 pcs Ø 70 x 40 mm Auxiliary guides: 2 pcs Ø 50 mm Motor: 15 kW – 22 hp (IE-3) Pump: 48 liters / ASC Speed: Forward 120 mm/sec – Return 140 mm/sec – Pressure: 13 mm – 5 mm/sec Installation height: 500 mm Stroke length: 400 mm Table plate: 800 x 600 x 120 mm (with T-slots) (customized design possible) Ram plate: 800 x 600 x 300 mm (with T-slots & ribbed welding) Table height: 850 mm (floor to top of table plate) ----- Hydraulic Accessories: Hydraulic control block & accessories: REXROTH Pressure adjustment via PLC (10 – 125 tons) Speed adjustable via PLC Air cooler Pre-fill valve Control Accessories: Siemens S7-1200 Main control cabinet Swivelling operator panel Safety PLC – SICK Light sensors SICK 700 + 150 mm Linear scale for setting stroke length 9” PLC screen – Siemens (German & English) Mobile two-hand operation Ethernet connection for remote maintenance Alarm indicator for faults (light & sound) Double workspace lighting 8 free inputs & outputs on the PLC for external connections The press complies with machinery directives Hydraulic proportional valves Two-channel cable protection Operating manual & parts list (German) With lateral safety door (doors slide to the rear)

Stanje: novo, Pressure: 125 Bending length: 3200 mm Distance between uprights: 2655 mm Main motor: 11 kW Maximum ram stroke: 200 mm Machine model: KK Industries 125x3200, 4 axes (Y1-Y2-X-R) with CNC crowning Rated force: 125 t Bending length: 3200 mm Distance between columns: 2655 mm Throat depth: 400 mm Ram stroke: 200 mm Maximum opening height: 455 mm Ram down stroke speed: 180 mm/s Ram return speed: 160 mm/s Ram working speed: 13 mm/s Main motor power: 11 kW CNC system: ZY68 Number of controlled axes: 4+1 Oil tank capacity: 300 L Back gauge X-axis travel: 600 mm X-axis speed: 200 mm/s Positioning accuracy: ±0.10 mm Repeatability: ±0.015 mm Back gauge motor power: 0.85 kW Back gauge R R-axis travel: 150 mm R-axis speed: 100 mm/s Positioning accuracy: ±0.10 mm Repeatability: ±0.015 mm Dimensions: Kedewacqxepfx Aczenb Length: 3450 mm Width: 1580 mm Height: 2550 mm Weight: 7100 kg Delem T53 control (surcharge €5,000)

Stanje: novo, Sheet length: 2560 mm; Sheet thickness: 4 mm; Dimensions (LxWxH): 3200 x 2250 x 1400 mm; Motor: 7.5 kW; Weight approx.: 3500 kg Standard equipment: - NC control - Programmable, motorized backgauge with 750 mm travel - Shadow line lighting - 1 stop rail with measuring scale - 2 sheet support arms - 1 sheet support arm (for models 1106, 1306, 1505) - Finger guard Knjdpfogickvsx Aczob - Ball transfer table - Easy front-side blade clearance adjustment - Ball screw - Cut counter - Portable foot pedal with emergency stop button - Light barrier on rear safety devices

Stanje: skoraj kot novo (rabljeno), Leto izdelave: 2018, obratovalne ure: 5.000 h, Funkcionalnost: popolnoma funkcionalen, Vrsta stroja: CNC stružno-rezkalni center Proizvajalec: DMG MORI Tip: NLX2500SY/700 s Fanuc industrijskim robotom tipa R2000ic/165F Leto izdelave: 2018 Krmiljenje: M730 UM Mapps CELOS Država izvora: Japonska Dobavni rok: po dogovoru Kodpjzcpkiefx Aczsnb Dobava: franko lokacija Dodatne informacije – CNC stružno-rezkalni center DMG MORI NLX2500SY/700 Maks. stružni premer: 356 mm Stružna dolžina: 705 mm Krmiljenje: M730 UM Mapps CELOS Premer obrata nad posteljo: 920 mm Premer obrata nad suportom: 742 mm Območje vrtljajev – glavni vreteno: 4.000 min⁻¹ Pogonska moč – glavno vreteno: 18,5 / 15 kW Vretenasti nos: JIS A2-8 Vrtina vretena: 80 (91) mm C-os: 0,001° Območje vrtljajev – nasprotno vreteno: 6.000 min⁻¹ Pogonska moč – nasprotno vreteno: 11 / 7,5 kW Vrtina vretena: 43 mm C-os: 0,001° Pomik v osi X: 260 mm Pomik v osi Z: 795 mm Y-os: +/- 50 mm Hitra pomika (X / Y / Z): 30 / 10 / 30 m/min Število orodnih postaj: 12 poz. Višina stebla za štirikotno orodje: 25 mm Premer stebla svedra: 50 mm Čas preklopa revolverja: 0,27 s Območje vrtljajev – gnana orodja maks.: 10.000 min⁻¹ Pogonska moč – gnana orodja: 5,5 / 4,2 kW Skupna priključna moč: 41 kVA Teža stroja približno: 6,4 t - Nasprotno vreteno - Gnan pogon orodij - C, Y-os Pridržujemo si pravico do sprememb tehničnih podatkov. Obseg dodatne opreme je v celoti naveden v tekstovnem opisu artikla. Za dodatno – npr. za namen ponazoritve – prikazano opremo ni nobenega jamstva.

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2007, Funkcionalnost: popolnoma funkcionalen, obratovalne ure: 15.396 h, stiskalna sila: 173 t, hod: 500 mm, skupna masa: 16.000 kg, delovna dolžina: 4.250 mm, Oprema: CE označba, popolna servisna zgodovina, Brez minimalne cene – zagotovljena prodaja po najvišji ponudbi! TRUMPF TruBend 5170, vključno s sistemom BendMaster! Stroj je bil ves čas redno vzdrževan in servisiran pri podjetju Trumpf, pri čemer so bili vsi podatki o vzdrževanju zabeleženi v servisni knjižici. Valji so neprepustni in ne puščajo olja. Na fotografiji prikazana orodja za robota so vključena. Kodpozzkvcjfx Aczsnb TEHNIČNE PODROBNOSTI Hod: 500 mm Sila pritiska: 1.700 kN Dolžina delovne površine: 4.250 mm Napetost orodja: Hidravlična, zgornja in spodnja Število osi: 6 Nosilnost: 60 kg PODROBNOSTI O STROJU Napetost: 3 x 400 V Nazivni tok: 41,0 A Frekvenca: 50 Hz Priključna moč: 28,0 kVA Nadzorna napetost: 24 V DC Čas zakasnitve: maks. 90 ms Zakasnitev pri 220 mm/s: maks. 10 mm Zakasnitev pri 160 mm/s: maks. 8,5 mm Delovni tlak: maks. 300 bar Teža: 16.000 kg DELOVNE URE Čas delovanja pritisne palice: 15.396 ur Čas delovanja hidravličnega sistema: 83.212 ur Čas delovanja stroja: 152.638 ur OPREMA Označba CE Dokumentacija/navodila Zadnji opora s senzorjem CNC upravljanje profila Bendmaster (robot, 8 m proga) Vakuumski manipulatorji CNC upravljana postaja za prijemanje Prepoznavanje dvojne pločevine Varnostna naprava BendGuard Lasersafe Rezervni deli: kabel za vleko, rezervni vakuumski disk, fiksatorji BWF (podstavki stroja) Pri izbiri transportnega vozila je nujno upoštevati višino in težo stroja. Za natovarjanje je na voljo viličar. V primeru, da stroj ni prevzet v dogovorjenem roku, se zaračuna pristojbina za skladiščenje v višini 20,00 € na serijo in začeti dan. Pristojbino je treba plačati pred prevzemom. Prodaja poteka brez kakršnih koli garancij in jamstev. Podatki o tehničnih specifikacijah izvirajo iz prvotne ponudbe. Ne prevzemamo odgovornosti za tiskarske in merilne napake. V primeru dvoma primerjajte podatke s priloženimi fotografijami ali si oglejte izdelek na licu mestu pred koncem dražbe.

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 1998, Funkcionalnost: popolnoma funkcionalen, številka stroja/vozila: 570602, potovalna razdalja osi X: 300 mm, pomik osi Y: 400 mm, model krmilnika: Siemens Sinumerik 840 C, Kot zasuka osi A (min.): −170 °, zasukni kot osi A (maks.): 170 °, Brez minimalne cene – zagotovljen nakup po najvišji ponudbi! TEHNIČNE PODROBNOSTI Pot osi X: 300 mm Pot osi Y: 400 mm Os A: –170° do +170° Hitrost osi X: 0,1–5.000 mm/s Hitrost osi Y: 0,1–5.000 mm/s Premer obdelovanca pri prestavnem razmerju 1:10: 300 mm Premer obdelovanca pri prestavnem razmerju 1:1: 212 mm Maksimalno število zob: 200 Minimalno število zob: 6 PODROBNOSTI O STROJU Nadzorni sistem: Siemens Sinumerik 840 C Knsdozwmx Eopfx Aczjb Skupna poraba moči: 38 kW Dimenzije in teža Potreben prostor: približno 4.200 × 2.200 × 2.100 mm Teža stroja: približno 10.000 kg

Stanje: rabljeno, Leto izdelave: 2006, stružna dolžina: 1.298 mm, premer struženja: 356 mm, največja hitrost vretena: 4.000 obr/min, model krmilnika: MORI SEIKI MSX 850III / MAPPS III, širina na sredini: 1.250 mm, TEHNIČNE PODROBNOSTI Največja razdalja med konicami: 1.250 mm Največja dolžina obdelovanca: 1.298 mm Knodpfx Acezwgquezjb Največji premer obdelovanca: 356 mm Standardni premer obdelovanca: 275 mm Premer obdelovanca nad ležiščem: 923 mm Hod osi X: 260 mm Hod osi Z: 1.345 mm Največje število vrtljajev vretena: 4.000 vrt/min Premer vretena: približno 80 mm Število revolverjev: 1 Število orodnih mest: 12 PODROBNOSTI O STROJU Krmilnik: MORI SEIKI MSX 850III / MAPPS III Dimenzije in teža Dimenzije (D x Š x V): 5.000 × 2.300 × 2.400 mm Teža stroja: 7.600 kg OPREMA IRCO SIMAG, avtomatski podajalnik Odstranjevalec sekancev Pogonska orodja Os C Os Y

Leto izdelave: 2023, obratovalne ure: 5.027 h, stanje: zelo dobro (rabljeno), Funkcionalnost: popolnoma funkcionalen, Oprema: dokumentacija / priročnik, Ponujamo zelo dobro ohranjenega robotskega manipulatorja Halter CNC Automation Millstacker Premium 25 za CNC rezkalne stroje, letnik 2023. -- Zelo malo delovnih ur Prilagoditve, ki so bile izvedene po naročilu in odstopajo od serijske opreme: 1. Dodana individualna odlagalna pozicija (pri nas po toboganu v vodno kopel). Pri tej nastavitvi je lahko z neobdelanimi kosi opremljenih vseh 12 skladiščnih pozicij – pri odlaganju na mizo je to možno le pri 11 pozicijah. Knsdpey Nmmijfx Aczeb 2. Individualna prilagoditev smeri postavitve v magazinu. Tako je možno daljše/večje kose polagati vzdolž med palice, kadar vstavljanje preko diagonalnih kotov ni več mogoče. 3. Dodatno izdelan komplet daljših podpornih palic za varno pozicioniranje večjih kosov. V primeru vprašanj ali če potrebujete več informacij, nam pišite ali nas pokličite.

Stanje: pripravljen za uporabo (rabljen), Leto izdelave: 2000, Stolpna vrtalna naprava MAXION / IXION BS 25 ST - G - Dobro vzdrževano splošno stanje - CE oznaka - Leto izdelave: 2000 - Zmogljivost vrtanja v jeklo: 25 mm - Naprava za rezanje navojev do M20 Knjdpfx Acsy Um Iwezjb - Vreteno / Morse stožec MK 3 - Vrtalni hod / hod vretena: 120 mm - Doseg: 260 mm - Območje vrtljajev / brezstopenjsko: 120-2160 min⁻¹ - Avtomatski pomik - Velikost delovne mize: 500x365 mm - Premer stebra: 110 mm - Razdalja vreteno – miza: 90-760 mm - Pogonska moč: 1,5 kW - Vrtalna glava Dimenzije: D׊×V 0,8×0,5×2 m / Teža 300 kg Pridržujemo si pravico do napak in tipkarskih napak