Beli Mesin Bor Kolom Roda Gigi bekas (81.757)

Kondisi: hampir baru (bekas), Tahun pembuatan: 2023, General Data • Machine type: Gear skiving machine • Machine number: 32335 • Year of manufacture: 2023 • Operating hours: unknown (The machine was only used for testing purposes and never used in production.) Machine Description • Gear skiving machine for machining soft and hard materials • For manufacturing skivable profiles on cylindrical workpieces Hedsywyt Sopfx Alcenl • Especially suitable for internally and externally toothed cylindrical gears • Equipped with integrated re-sharpening unit • Axes of the re-sharpening unit: +A3, +C3, +X3 • Integrated swivel gripper for workpiece handling • Workpieces are transferred from the transfer station to the workpiece table • Machining is performed using a skiving cutter • The machine was temporarily installed in another facility • According to reports, the machine was operated for only one hour – short test period Machine Specification Workpiece Dimensions • Internal diameter range: 40 – 300 mm • External diameter range: up to 450 mm Spindle • Tool spindle (C2): 2,990 rpm • Grinding spindle of the re-sharpening unit (C3): 12,000 rpm Tool Holder • Tool interface: HSK B125 Control System • Control: Sinumerik 840 D Special Features • Integrated re-sharpening unit with axes +A3, +C3, and +X3 • Integrated swivel gripper for automated workpiece handling Other Information • Total power consumption: approx. 100 kVA • Operating voltage: 400 V AC / 50 Hz • Machine dimensions: approx. 3,900 x 5,700 x 5,400 mm (H x W x D) • Machine weight: approx. 11,000 kg Optional Accessories • Hydraulic unit • Chip conveyor • Coolant chiller with filter and centrifuge

Kondisi: baik (bekas), Tahun pembuatan: 1982, Wheel diameter – max. 600 mm Wheel width 500 mm Module – max. 15 Module – min. 1 Total power requirement 2 kW Hnjdpfx Alewftuxocsl Machine weight approx. 2 t Space requirements approx. 2x1.5x2 m The tooth rounding is achieved by a combination of the cutter shifting movement and the continuous rotary motion of the workpiece. The alternate movement of the cutter is controlled by the rotation of a cam, which is shaped to create either a radius or a chamfer. A series of 4 cams allows machining within the module range from 1 to 16 (inclusive). An adjustment device enables changing between the minimum and maximum module value for each cam. The rotation of the workpiece is controlled by a three-stage gear unit, which forms the indexing system. The workpiece lock and the rapid approach of the cutter to the workpiece are controlled by pneumatic servo devices. The practicality and speed of the equipment, along with the extensive selection of profiles available on the cams and the ability to process internal gears, make the machine a universal solution suitable for both small and large batch production. --> Technical specifications Max module: 15 --> Max diameter: 600 mm --> Spindle/head speeds: 1,450 – 2,100 – 2,800 rpm --> Production output teeth per minute: 35 – 50 – 75 --> Spindle motor power: 2,800 rpm – 1.5 HP --> Workpiece rotation motor power (self-braking): 1.5 HP --> Automatic motor power (self-braking): 0.35 HP --> Coolant system motor power: 0.25 HP --> Dimensions: 2,000 x 1,500 mm --> Total weight: 2,000 kg Accessories Cam x 5 Indexing gears Tooling Serial No. 152/0589/94 Machine with full enclosure Counter-holder

Kondisi: baik (bekas), Tahun pembuatan: 1972, Diameter roda - maks. 80 mm Lebar roda 60 mm Hsdpfx Aew N S D Solcjnl Modul - maks. 3 Modul - min. 0,1 Kebutuhan daya total 0,4 kW Berat mesin sekitar 120 kg Kebutuhan ruang sekitar 0,6x0,6x0,75 m Mesin ini digunakan untuk penggerindaan roda gigi bevel kecil / roda gigi lurus. Untuk proses milling roda gigi bevel digunakan Mikron 102.01.

Kondisi: baik (bekas), Tahun pembuatan: 1975, de-to-hu-20240624 Hsdpeyb Sx Tefx Alconl

Kondisi: bekas, raddurchmesser-300mm Hnsdexu Nttspfx Alcjl

Kondisi: baik (bekas), Tahun pembuatan: 1965, de-to-hu-it-lt-lv-nb-nl-pl Hnsdpfjywnt Tjx Alcjl

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2007, Fungsionalitas: berfungsi sepenuhnya, diameter roda: 400 mm, berat keseluruhan: 4.000 kg, jarak antara pusat: 550 mm, kecepatan spindel (maks.): 3.000 rpm, model controller: Siemens 840 D, DETAIL TEKNIS Diameter roda maks.: 400 mm Diameter benda kerja: 36-400 mm Jarak sumbu: 135-290 mm Putaran maksimum spindle (tidak bertingkat): 3.000 rpm Jarak antar puncak: 100-550 mm DETAIL MESIN Kontrol: CNC Siemens 840 D Dimensi & Berat Kebutuhan ruang: sekitar 2.000 x 3.055 x 2.788 mm Berat mesin: sekitar 4.000 kg PERLENGKAPAN Pengujian gir dengan satu sisi kontak Pengujian gir dengan dua sisi kontak Hnjdjywg Hxopfx Alcjl Pengujian getaran bodi Pengujian heli pada kontak dua sisi Dapat digunakan hingga 6 slide pengujian Akurasi dan repeatabilitas pengujian tertinggi Meja mesin dengan penggerak benda kerja Unit pneumatik dapat diputar Sistem pelumasan semprotan (Tipe: Vogel) Ekstraksi kabut oli (Tipe: Elbaron)

Kondisi: siap digunakan (bekas), Tahun pembuatan: 1997, Fungsionalitas: berfungsi sepenuhnya, diameter roda: 275 mm, lebar roda: 150 mm, jarak pergerakan sumbu X: 640 mm, jarak lintasan sumbu Y: 870 mm, diameter benda kerja (maks.): 275 mm, TECHNICAL DETAILS Wheel Diameter: 275 mm Wheel Width: 150 mm Maximum Module: 6 Minimum Module: 1.5 Workpiece Diameter: 275 mm Maximum Face Width: 5.5 mm Spiral Angle: 0–60° Number of Teeth: 5–120 Minimum Transmission Ratio: 1:1 Maximum Transmission Ratio: 1:10 Milling Depth Axis (X-Axis) Travel: -25 to 640 mm Max. Traversing Speed: 6 m/min Workpiece Positioning Axis (Y-Axis) Travel: 870 mm Max. Traversing Speed: 4.5 m/min Axis Offset (Z-Axis) Travel Range: +/- 50 mm Max. Traversing Speed: 0.657 m/min Generating Rotation Axis (A-Axis) Swivel Range: 315° Max. Swivel Speed: 40°/s Workpiece Spindle (B-Axis) Max. Workpiece Spindle Speed: 300 rpm External Taper Mount Diameter (1:4): 140 mm Internal Taper (1:20): 99.218 mm Workpiece Spindle Bore: 90 mm Workpiece Swivel Axis (C-Axis) Swivel Range: -8.5 to 98° Max. Swivel Speed: 21.5°/s Tool Spindle (D-Axis) Tool Spindle Speed: 60 to 350 rpm Tool Positioning Axis (E-Axis) Swivel Range: 0 to 360° Max. Swivel Speed: 19.5°/s Machine Distance (V-Axis) Travel: 150 mm Max. Traversing Speed: 1.6 m/min MACHINE DETAILS Hodpeywgy Sjfx Alcsnl Cutter Drive Motor Power: 20 kW Workpiece Drive Power: 14.5 kW Total Power Requirement: 62 kVA Dimensions & Weight Machine Weight: approx. 12 t Space Requirements: approx. 4,700 x 4,387 x 2,450 mm EQUIPMENT 13 Cutters

Kondisi: bekas, 1 Hnedpfx Aljyhf Izocjl

Kondisi: bekas, Produsen: WMW Tipe: ZFW-Z 160x3 Mesin hobbing roda gigi Diameter benda kerja maks.: sekitar 160 mm Modul maks.: 3 Pengoperasian manual dan semi-otomatis Konstruksi: Mesin kokoh dan presisi, dirancang untuk akurasi tinggi dalam produksi roda gigi Hanya untuk waktu terbatas 10.000 Euro untuk 1x mesin hobbing roda gigi WMW 2x mesin rolling ulir WMW UPW25!!!!! Hnsdpfx Asyy N Hyelcsl Hanya untuk waktu terbatas 2x WMW UPW25 1x mesin hobbing roda gigi WMW Semua hanya 10.000 Euro !!!!!

Kondisi: baik (bekas), Tahun pembuatan: 1973, FELLOWS 70-15 ZAHNRADSTOSSMASCHINE – Modell 70-15: Schwerlast-Vertikal-Zahnradstoßmaschine von Fellows, geeignet für die Fertigung von externen geradverzahnten Stirnrädern bis zu einem Teilkreisdurchmesser von 1.778 mm (70"), sowie für Innenzahnräder und Keilwellen im Bereich von 0 bis 2.235 mm (88") Teilkreisdurchmesser, unabhängig vom Schälradien des Stoßmeißels. Diese einzigartige Eigenschaft, kombiniert mit einer Stirnbreite von 381 mm (15") und einer Bearbeitungsstärke von 1,7 DP in Stahl, macht die Maschine zu einer leistungsstarken Plattform für die Produktion eines breiten Spektrums größerer Zahnradkomponenten. Ausstattung: * Maschinenhauptgestell mit Arbeitstisch, oberer Säule, Stoßmeißelschlitten und Führung, besonders robuste Bauweise * Maschine mit Rückhubmechanik ("Saddle Backoff") zur Werkzeugentlastung * Stoßmeißelspindel 158,75 mm (6,25") Durchmesser mit Standardführung für Geradeverzahnung * Werkzeugpositionierung über Hubtasten * Schnelllauf zur Rundlaufprüfung des Werkstücks * Schneller Vorschub des Supportschlittens relativ zum Werkstück * Automatischer Tiefenzustellmechanismus für eine bis vier Schnitte, mit 4-Gang-Motor für Drehzahlwechsel beim Fertigschnitt * Verschiedene Vorschub- und Vorschubwechselräder * Verschiedene Húbenwechselräder * 50,8 mm (2") Erhöhungsplatte * Hauptantriebsmotor 11 kW (15 PS), 650/220 U/min, 240 Volt 60Hz mit Westinghouse-Gleichrichter für Wechselstrom * Zentrale Kraftschmierung aller relevanten Bauteile mit "Lubriquip Lub Controller" * Kühlmitteltank, Pumpe und Rohrleitungen, inklusive Spansammelwanne * Vollständige Elektrikausstattung * Diverse Schutzabdeckungen * 2.134 mm (84") T-Nutentisch * Hydraulikanlage * Maschinenleuchte * Bedienplattform * Werkzeugaufnahme * Dokumentation / Handbücher Technische Daten: Max. Werkstück-Ø außen (Nennmaß): 1.778 mm (70") Max. Werkstück-Ø innen (Nennmaß): 2.235 mm (88") Max. Werkstück-Ø (Aufspann-Durchmesser): 2.642 mm (104") Tischdurchmesser: 2.134 mm (84") Max. Werkstückgewicht inkl. Vorrichtung: 16.330 kg (36.000 lbs) Hedpfxortrxie Alcjnl Max. Abstand Werkstückspindelmitte zu Werkzeugspindelmitte: 889 mm (35") Min. Abstand Werkstückspindelmitte zu Werkzeugspindelmitte: 0 mm Max. Werk- und Vorrichtungsbauhöhe (Werkzeugspindel in oberster Position): 711 mm (28") Max. Modul (volle Zahnlänge): 12,7 (entspricht 2 DP) Max. Modul (Kurzzahn): ca. 33,89 (0,75 DP) Modulbereich für 30°-Keilwellen: 12,7 bis 5,08 (2-5/5 DP) Durchmesser Stoßmeißelspindel: 158,75 mm (6,25") Max. Hub: 486 mm (19.118") Max. Stirnbreite (Nennwert): 381 mm (15") Stößelfrequenz (stufenlos): 5–122 Hübe/Min. Max. Zustellung Werkzeugschlitten: 0,05 mm/min (0.0020 in/min) Min. Zustellung Werkzeugschlitten: 0,012 mm/min (0.0005 in/min) Max. Dreheinzug pro Hub (bezogen auf 1" Werkzeugdurchmesser): 0,173 mm/Min. (0.0068 in/min) Min. Dreheinzug pro Hub (bezogen auf 1" Werkzeugdurchmesser): 0,015 mm/Min. (0.0006 in/min) Maschinenmaße ca.: 4.880 x 3.660 x 3.810 mm (192" x 144" x 150") Maschinengewicht ca.: 43.100 kg (95,000 lbs)

Kondisi: baik (bekas), Tahun pembuatan: 1993, Ausstattung: - 9" Fräskopf - Kraftvorschubeinheiten - Kronenschleifen - Automatischer Lader - Heidenhain-Maßstäbe - Variabler Vorschub/Fräskopfgeschwindigkeit - RS232-Schnittstelle - Trabon-Schmiersystem - Kühlmittel mit Magnetspäneabscheider - AC-Servomotoren Hedpfxoruahws Alcjnl - Komplette Spritzschutzverkleidung - Signalleuchte (Stack Light) - Handbücher Technische Daten: • Werkstück Teilkreisdurchmesser, 9" & 12" Fräskopf: 1–12", 1–8" • Max. Werkstück-Außendurchmesser, 9" & 12" Fräskopf: 12,5", 8,5" • Modulbereich: 4–20 • Abstand zwischen den Spitzen: 23" • Fräskopf-Drehzahl, 9" & 12" Kopf: 50–500, 50–400 • Maximale Tischverfahrung (konventionell, tangential, diagonal): 5", 2", 5"–2" • Diagonalverfahrwinkel, gerades Schaben: 0°–90° • Schabwinkel für Kronenschleifen: max. ca. 45° • Maximale Tischtischneigung beim Kronen: 5° • Maximale Tischtischneigung beim Konisch-Schleifen: 1° 30' • Maximaler Kreuzachsenwinkel Fräskopf links & rechts: 25° • Quervorschub Tisch, Zoll/Min: 0,5–35 • Vertikalvorschub Tisch, Zoll/Min: 0,004–12,5 • Vertikalverstellung Tisch: 8 1/8" • Gewicht ca.: 4.350 kg

Kondisi: bekas, Tahun pembuatan: 2002, Maximum wheel diameter - 275 mm Module - max. 6 Module - min. 1.5 Control system: SINUMERIK 840 C Gear width: 5.5 mm Spiral angle min. 0° / max. 60° Number of teeth - max. 120 Number of teeth - min. 5 Maximum transmission ratio: 1:10 Minimum transmission ratio: 1:1 Maximum workpiece spindle speed: 110 rpm Cutter head speeds: 20 - 110 rpm Total power requirement: 100 kW Machine weight: approx. 16.7 t Hnodevxwnwopfx Alcol Space required: approx. 5.20 x 2.30 x 2.40 m Integrated deburring unit U-axis / Q-spindle Chip conveyor Coolant system Electrostatic air cleaner ELBARON No tools No workpiece clamping device

Kondisi: bekas, Tahun pembuatan: 1979, raddurchmesser1000 Hjdeyb S H Djpfx Alcenl

Kondisi: siap digunakan (bekas), Tahun pembuatan: 1985, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 0440298, mesin bor meja: 120 mm, diameter meja: 500 mm, berat keseluruhan: 5.200 kg, diameter roda gigi: 500 mm, DETAIL TEKNIS Diameter roda: 500 mm Diameter roda minimal: 50 mm Diameter maksimum lingkar luar roda dengan internal gear: 800 mm Jarak maksimum antara sumbu pemotong dan sumbu meja: 355 mm Jarak minimum antara sumbu pemotong dan sumbu meja: 0 mm Jumlah gigi maksimum pada roda yang dipotong: 300 Jumlah gigi minimum pada roda yang dipotong: 12 Modul terkecil: 1,5 Modul terbesar: 8 Diameter meja: 500 mm Lubang meja: 120 mm Kedalaman lubang: 650 mm Hnodpfx Asyx U T Ajlcjl DETAIL MESIN Berat: 5.200 kg

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, transmisi 4-percepatan Hsdpfx Alsyxcu Iscsnl putaran dari 180 hingga 2000 rpm daya motor 0,75 kW pembatas kedalaman pengeboran pengaturan naik/turun ragum dijual terpisah, dengan biaya tambahan

Kondisi: bekas, Fungsionalitas: berfungsi sepenuhnya, Dijual satu unit gearbox bevel/screw Oerlikon seri E 37 EX 2, nomor seri 828499L01.1. Unit ini berasal dari instalasi yang berfungsi dan cocok untuk bangku uji, mesin khusus, serta teknologi penggerak industri. Spesifikasi teknis (umum): Pabrikan: Oerlikon Hjdpfoypb Iyex Alcenl Tipe: E 37 EX 2 Jenis: gearbox bevel/screw Aplikasi: teknologi bangku uji, konstruksi mesin, penggerak industri Kondisi: bekas, berfungsi

Kondisi: sangat baik (bekas), Tahun pembuatan: 2009, Fungsionalitas: berfungsi sepenuhnya, jarak pergerakan sumbu X: 13.000 mm, jarak lintasan sumbu Y: 5.000 mm, jarak gerak sumbu Z: 1.200 mm, kecepatan spindel (maks.): 2.500 rpm, posisi kepala milling: Testa ad assi ortogonali indexati - TTL2 25 360, diameter spindel: 180 mm, jarak perjalanan sumbu W: 1.000 mm, beban meja: 100.000 kg, gerak cepat sumbu X: 20 m/menit, pergeseran cepat sumbu Y: 20 m/menit, pergerakan cepat sumbu Z: 20 m/menit, panjang meja: 3.000 mm, lebar meja: 3.500 mm, jarak gerak quill: 2.500 mm, diameter quill: 180 mm, langkah spindel: 1.000 mm, berat benda kerja (maks.): 100.000 kg, torsi: 9.050 Nm, CNC BORING MACHINE PAMA mod. SPEEDRAM 2000 Hydrostatic Numerical control: Siemens Sinumerik 840D Axis X: 13,000 mm Axis Y: 5,000 mm Axis Z: 1,200 mm Axis W: 1,000 mm Total axial stroke (Z+W): 2,200 mm Working feed on all axes: 8,000 mm/min Rapid feed on all axes: 20,000 mm/min Spindle: Boring spindle diameter: 180 mm Spindle ram dimensions: 400 x 440 mm Spindle speed (3 ranges), max: 2,500 rpm Spindle power (S1): 91 kW Spindle nominal torque (S1): 9,050 Nm Spindle internal taper: ISO 50 DIN 69871 AD-Type Big Plus Indexable orthogonal axes head - TTL2 25 360 Tool taper: ISO 50 DIN 69871/2 AD-Type Big Plus Max spindle power: 25 kW Max spindle speed: 2,500 rpm Speed ratio: 1:1 Spindle indexing: +/- 100°, 200 positions per 1° Head indexing: +/- 180°, 360 positions per 1° Max nominal spindle torque: 1,000 Nm TH 100 Rotary-Translating Table: Table dimensions: 3,000 x 3,500 mm Load capacity: 100 tons Central T-slot size: 36h7 mm Lateral T-slot size: 36h12 mm T-slot pitch: 320 mm Longitudinal travel, Axis V: 2,500 mm Feed/rapid feed, Axis V: 10,000 mm/min Hsdeyxg Hbjpfx Alcenl Chain tool magazine with 145 r80, 80 tools Machine weight approx. 160/165 tons Complete with: - Hinged belt-chip conveyor - No. 02 side chip conveyors for the rotary table - Accessory rack with 2+1 positions, closed fixed type - Fixed tool rack (ISO50, 6 positions) - External and internal tool cooling system, 30 bar - Wireless workpiece probe (Renishaw) USED MACHINE YEAR 2009

Kondisi: bekas, Tahun pembuatan: 2013, Raddurchmesser - max. 260 mm Radbreite 320 mm Modul - max. 4,5 Modul - min. 0,5 Steuerung SIN 840D Schrägungswinkel - max. +/- 45 ° Gesamtleistungsbedarf 68 kW Hodex R U Hgspfx Alcenl Maschinengewicht ca. 15,50 t Raumbedarf ca. 3,25 x 3,25 x 3,30 m Feuerlöschsystem Siemens Sinorix TM Knoll Filteranlage VL1500/8000 Bj.2017 Ölnebelabscheider 3NINE NINA 1200 Wekal Ladezelle Schleifscheiben

Kondisi: bekas, Tahun pembuatan: 2012, Maximum wheel diameter: 300 mm Wheel width: 320 mm Module – max.: 10 Module – min.: 0.5 Maximum helix angle: 45° Frequency: 50 Hz Voltage: 400 V Main fuse: 125 A X-axis: 270 mm Y-axis: 250 mm Z-axis: 320 mm A-axis: +/- 45° B-axis: 360° C-axis: 360° Total power requirement: 89 kW Hedpfx Aex R U Haolcenl Machine weight approx. 23.5 t Space requirement approx. 11.2 x 5.5 x 2.9 m Automated Oil centrifuge station EWAB workpiece storage Hoffmann coolant filtration system HSF 100 SE/K Minimax fire extinguishing system W+W air filtration system Promot Automation "Cellmaster" (3 cells), year of manufacture 2019

Kondisi: bekas, Tahun pembuatan: 2003, Wheel diameter – max. 275 mm Wheel width 58 mm Module – max. 13 Module – min. 2 Control system SINUMERIK 840 D Number of teeth min./max. 5 - 200 Maximum gear ratio 10:1 Cutter diameter max. 228 mm X-axis 25 - 350 mm Y-axis +/- 175 mm Z-axis 125 - 600 mm B-axis -5 / +90° Total power requirement 75 kW Machine weight approx. 11.7 t Hsdpfsx R U E Nex Alcenl Space requirements approx. 12.5 x 3.0 x 3.0 m Equipped for dry milling Deburring press Deburring unit with powered brush Integrated magnetic chip conveyor Promot Cellmaster Cartridge pulse filter system

Kondisi: siap digunakan (bekas), 1 Hnedpfxoyw Hxnj Alcel

Kondisi: baik (bekas), Tahun pembuatan: 2002, 10442 Hnedeym Nbcepfx Alcjl

Kondisi: bekas, Tahun pembuatan: 2008, fa512b7e Hnodeyv Ipfjpfx Alcsl

Kondisi: bekas, Tahun pembuatan: 2007, Maximum gear cutting diameter: 2,000 mm Workpiece diameter: 2,700 mm Table diameter: 1,500 mm Maximum module: 22 Control: 840D Rotational speed: 3.5 rpm Maximum table load: 20,000 kg Centre distance: 70 – 1,220 mm Stroke length: 30 – 330 mm Strokes per minute: 10 – 200 spm Total power requirement: 138 kW Machine weight: approx. 38 t Space requirements: approx. 11 x 5 m Machine: Fully CNC machine with electronic gear coupling for C and D axes and digital INDRAMAT drive technology. Self-rigid machine bed in welded construction. Radial axis (X-axis) with hardened guideways, sliding guide with overhang, Longitudinal guide with recirculating roller shoes. Ground, preloaded ball screw with backlash-free preloaded nut. Digital AC drive technology with backlash-free gearbox. Linear measurement system for radial positioning. Freestanding machine table with electrohydraulically backlash-free preloaded double worm gear, pitch circle diameter 1,365 mm, hydrostatic axial and radial bearings, automatic workpiece weight compensation. Through-table bore diameter 500 mm, open downward. Water-cooled digital AC servo motors. The machine must be installed on a foundation. Column: Machine column as high-rigidity cast construction for axial travel 1,200 mm. Axial axis (Z-axis) with hardened guideways, slide-guided, longitudinal guide and overhang with recirculating roller shoes. Ground ball screw with backlash-free preloaded nut. Digital AC drive technology. Encoder for axial positioning. Hodex R U Hmjpfx Alcenl Gear Shaping Head: SK 4.1 with hydraulic NC servo drive for stroking spindle movement and cutter lift-off, stroke length 330 mm, stroking spindle diameter 160 mm. Hydrostatically mounted stroking spindle, straight guide, and lateral guide for cutter lift-off. Maximum tool diameter: 300 mm. Drive motor power: 30 kW Stroke rates from 10 – 200 spm, stroke speed from 5 – 45 m/min. Stroking spindle speed for cutting and return stroke can be independently programmed. Spindle speed is constant in the cutting area. Maximum cutter head rotational speed: 10 rpm, digital AC drive technology. Cutter lift direction manually reversible for internal and external gearing. Lateral offset of the stroking spindle axis by up to 50 mm from machine center manually adjustable to avoid collision of cutter during return stroke.