Used Gear Hobbing Machine for sale (70,014)

Condition: ready for operation (used), Year of construction: 2008, functionality: fully functional, GP300 CNC gear hobbing machine, WET AND DRY MACHINING available as required. Both options are freely selectable. Gedpfx Ajxqn Tqem Asbr Siemens 840D Solution Line, 5-axis system, suitable for shaft and disc-type workpieces. Max. Ø300 mm, max. module 6, swivel range ±45°, axial travel 440 mm, hobbing power 15 kW, HSK-B80, table Ø300 mm, direct drive, speed 90–900 rpm. High precision, digital drive technology (Sinamics S120), automatic head positioning 0.001°, linear guides, safety retraction, temperature compensation, full enclosure.

Condition: good (used), Year of construction: 1987, operating hours: 2,685 h, functionality: fully functional, feed length X-axis: 240 mm, feed length Y-axis: 200 mm, feed length Z-axis: 400 mm, total length: 5,235 mm, total height: 3,045 mm, total width: 3,990 mm, spindle speed (max.): 640 rpm, spindle speed (min.): 55 rpm, overall weight: 11,000 kg, Equipment: documentation/manual, Gear cutting machine Pfauter PE 300 Model: SK07E 20100 Control: Sinumerik System 3 Fully functional machine, which was completely overhauled just a few years ago. Investments made: - Overhaul including milling head (2021) approx. €70,000 - All hydraulic hoses renewed (2021) approx. €3,500 - New oil mist separator (2021) approx. €5,000 Gbodpfxsw Dcx Ro Am Asr Numerous tools and clamping devices available, see pictures and attachment.

Condition: used, max. wheel diameter 2000 mm gear width . mm max. module 22 max. hob diameter 250 mm hob turning speeds 16-92 U/min total power requirement 13 kW The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale Godpjyqukkofx Am Aebr apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team

Condition: used, Manufacturer: WMW Gbodsyy N Hyjpfx Am Ajr Type: ZFW-Z 160x3 Gear hobbing machine Max workpiece diameter: ca. 160 mm Max modul: 3 Operated manual and semi-automatic Structure: Sturdy, precision-engineed machine designed for high accurance in gear production For limited period 10000 Euro for 1x WMW gear hobbing machine 2x WMW UPW25 thread rolling machines!!!!! Just for limited period 2x WMW UPW25 1x WMW gear hobbing machine All for just 10.000 Euro !!!!!

Condition: used, Year of construction: 2007, max. wheel diameter 380 mm gear width 540 mm max. module 7 Control SINUMERIK 840 D Axial travel 600 mm table diameter 317 mm table speeds 100 U/min milling head -swivable + / - 35 Grad milling spindle drive 27,00 kW milling spindle speeds (infinitely variable) 1500 U/min diameter of hob 160 mm cutter length max. 330 mm cutter speeds max. 3000 1/min hob dia. - max. 160 mm swarf cutter lenght - max. 330 mm tangential travel max. 300 mm Gedpfx Ameyt Rvhe Aebr 10.000 mm/min tangential speed max. 3000 mm/min 7.500 mm/min oil volume 100 l coolant capacity 780 l Counterholder movement 540 mm total power requirement 50,00 kW weight of the machine ca. 16,00 t dimensions of the machine ca. 6,00 x 4,50 x H3,50 m for the following processes: axial hobbing, individual part milling, Worm wheel milling, roofing, deburring; NC tailstock

Year of construction: 1984, condition: ready for operation (used), A Pfauter vertical CNC gear hobbing machine is available. Modules min./max.: 1/3, max. workpiece diameter: 150mm, max. tooth width: 150mm, milling head tilt: +/-45°, milling cutter axis-table axis distance: 10mm-160mm, table diameter: 160mm, table bore: 63mm. Tool holder: SK40, max. cutter diameter: 130mm, max. cutter length: 220mm, speed: 600rpm, feed: 1500mm/min, tangential path: 170mm, rapid traverse: 3m/min. Machine dimensions X/Y/Z: approx. 4000mm/3000mm/2500mm, weight: approx. 6500kg. On-site inspection is possible. Gsdpowkih Eofx Am Aebr

Condition: used, Year of construction: 1987, max. wheel diameter 4400 mm gear width 645 mm max. module 35 Control Siemens main drive motor 37 kW table diameter 2500 mm Gedpfjyqt S Hsx Am Aobr ical angle +/- 30 ° workpiece weight 40000 kg total power requirement 142 kVA weight of the machine ca. 75 t Partial overhaul 2006 5 controlled axes a, c, x, y, z Max. gear outer diameter 3000 mm Max. outer diameter for internal gears 3560 mm Max. module with hobs 30 Max. module with internal form cutters 18 Min. gear diameter 900 mm Axial feed travel 1800 mm Largest axial slide travel 1800 mm The tech. Data are manufacturer or operator information and therefore non- binding. We reserve the right to prior sale; Our terms and conditions of sale apply exclusively. About us More than 400 of our own machines in stock Over 15,000 m² of storage space, 70 t crane capacity More than 10,000 items and accessories for your workshop If you are interested in selling machines, production lines, or your business, please contact us. You can find further offers on our website. Tours are possible by appointment. We look forward to your visit. Your Markus Hirsch Team

Condition: ready for operation (used), LIEBHERR - LORENZ S800 / Gear Hobbing Machine - Well-maintained machine with extensive accessories - 1x pallet / change gears - 1x pallet / hobs - 1x pallet / arbors - DOCUMENTATION - Max. workpiece length with tailstock 600 mm - Max. workpiece length with retracted tailstock 800 mm - Max. traverse of milling slide 360 mm - Maximum pitch cut on largest workpiece 5 PI / in standard range 8 PI - Spindle taper – milling spindle MK 5 - Milling arbors 22 / 27 / 32 / 40 mm - Max. milling diameter 186 mm - Max. milling cutter length 170 mm - Max. cutter shift 80 mm - Milling speeds 40 – 220 rpm - Infinitely variable feed rates / horizontal - Infinitely variable feed rates / vertical - Infinitely variable feed rates / tangential - Clamping table without coolant trough 550 mm - Clamping table bore 100 mm - Arbor taper MK 5 Dimensions (LxWxH): 3.6 x 1.8 x 1.9 meters / Weight: 5,000 kg Errors and omissions excepted. Gbedpfx Ameyl Slhe Aor

Condition: like new (used), functionality: fully functional, workpiece weight (max.): 3 kg, feed length X-axis: 100 mm, feed length Y-axis: 100 mm, feed length Z-axis: 200 mm, workpiece diameter (max.): 180 mm, milling length: 200 mm, overall weight: 5,000 kg, rotational speed (max.): 3,000 rpm, rotational speed (min.): 400 rpm, tool diameter: 80 mm, Equipment: documentation/manual, rotational speed infinitely variable, This machine is completely dismantled and rebuilt from the ground up. During the overhaul, it undergoes comprehensive modernization with state-of-the-art technology and the latest premium-quality components. Following refurbishment, the machine is presented in a technical and visual condition equivalent to new – reliable, high-performance, and future-proof. Gbodpfxjx Af A Hj Am Aer The equipment and configuration can be tailored individually to your requirements, ensuring maximum productivity in your production environment.

Condition: refurbished (used), functionality: fully functional, Universal Profile Hobbing and Thread Milling Machine ZFWVG 250x5000 / S7 • Thread milling • Gear hobbing • Longitudinal milling Max. workpiece diameter over saddle: 250 mm Max. workpiece diameter over bed guideway: 500 mm Gbsdpfjw Hquxsx Am Asr Spindle bore: 102 mm Tailstock quill travel: 100 mm Main motor: 4.0 kW Cross-feed motor (X-axis): 4.3 kW Longitudinal feed motor (Z-axis): 3.8 kW Electrical configuration Operating voltage: 400 V Control voltage: 24 V Frequency: 50 Hz Programmable logic control (PLC) for fixed machine functions Total connected load: 9.5 kW Milling length: 5,000 mm Space requirements: Length: 7,000 mm Width: 2,500 mm Height: 1,600 mm Net weight: 6,700 kg Standard accessories: • Standard thread milling attachment ApG • Max. milling diameter: 150 mm • Spindle taper: Morse 3 • Max. module for hobbing: Module 3 • Min./max. number of teeth for hobbing: 4–50 Options: • Hobbing attachment ApFW Hobbing of parallel and helical profiles up to module 7 Max. milling diameter: 150 mm Spindle taper: Morse 4 • Heavy-duty thread milling attachment ApGS Hobbing of parallel and helical profiles up to module 5 Max. milling diameter: 150 mm Spindle taper: Morse 4

Condition: good (used), Year of construction: 2003, functionality: fully functional, workpiece weight (max.): 12,000 kg, feed length Y-axis: 300 mm, feed length Z-axis: 1,080 mm, table diameter: 1,200 mm, feed rate X-axis: 3 m/min, feed rate Y-axis: 500 m/min, feed rate Z-axis: 3 m/min, input current: 195 A, workpiece diameter (max.): 1,600 mm, milling spindle length: 450 mm, table bore: 400 mm, spindle speed (min.): 250 rpm, overall weight: 51,000 kg, power: 115 kW (156.36 HP), Equipment: documentation/manual, Liebherr high-performance gear hobbing machine LC1502 in good condition Godpfjwqm A Tex Am Ajbr Controller Liebherr LH90 V4, Bosch Rexroth drives Extensive accessories such as BHG, cooling unit for lubrication and coolant, extractor, cutter arbors, various software packages/limit value extensions, and complete documentation. We can also assist with setup and commissioning up to production, depending on effort!

Condition: excellent (used), Year of construction: 1980, Horizontal gear hobbing and threading machine for gears, splined shafts, worm screws, threads, and pinions up to 5 meters in length, complete with 3 milling heads models APFW, APGS, APG, set of gears, various steadies, and indexing device. Gbodpfx Amsyba Rwj Aer

Condition: used, functionality: fully functional, table diameter: 430 mm, The price is for both machines – only sold as a set. Make: STAEHELY SH 500 Gbsdpfx Aoxfub Dom Aer Accessories: change gears, arbors, and one machine with tangential milling head (see photos)!!!!! Table diameter = 430 mm Max. gear diameter = 500 mm Gear width = 240 mm Module = 6

Condition: used, functionality: fully functional, wheel width: 800 mm, module 1-6 diameter max 600mm Gsdpfjxhck Sex Am Aebr digital reading Complete machine with documentation, tool holders, change gears,...

Condition: ready for operation (used), Year of construction: 1966, operating hours: 10,000 h, functionality: fully functional, workpiece weight (max.): 3,000 kg, wheel width: 400 mm, feed length X-axis: 483 mm, feed length Y-axis: 381 mm, feed length Z-axis: 521 mm, rotary table diameter: 740 mm, table diameter: 740 mm, total length: 4,500 mm, wheel diameter: 1,000 mm, gear diameter: 1,000 mm, total height: 2,450 mm, total width: 2,450 mm, input frequency: 50 Hz, workpiece diameter (max.): 1,000 mm, type of input current: three-phase, spindle speed (max.): 200 rpm, table bore: 89 mm, spindle speed (min.): 50 rpm, grinding spindle motor power: 7,500 W, overall weight: 8,000 kg, rotational speed (max.): 200 rpm, rotational speed (min.): 50 rpm, table load: 3,000 kg, helix angle: 45 °, Equipment: documentation/manual, rotational speed infinitely variable, Machine Description — Churchill U 3615 Gear Hobbing Machine The Churchill U 3615 is a heavy-duty gear hobbing machine designed for accurate and reliable cutting of spur and helical gears in industrial production environments. Built with a rigid cast-iron structure, the machine ensures excellent stability, low vibration, and consistent machining quality during continuous operation. The machine is capable of cutting gears with a maximum diameter of 1,000 mm without tailstock and 863.6 mm with tailstock, and supports workpieces weighing up to 3,000 kg. A maximum gear face width of 400 mm and a maximum module of 10 allow machining of medium to large-sized gears. Gjdpfox Itfijx Am Asbr The rotary table has a diameter of 740 mm, is equipped with six T-slots, and features a table bore of 89 mm, providing secure and precise workpiece clamping. The machine supports helical gear cutting up to ±45°, expanding its application range. The hobbing spindle accepts tools up to 180 mm in diameter and 240 mm in length. Spindle speed is infinitely variable from 50 to 200 rpm, allowing optimal cutting conditions for different materials and gear geometries. Feed movements are controlled via P.I.V. variable drives, offering smooth and precise adjustment of vertical, horizontal, and tangential feeds, as well as intermittent and continuous hob shifting. The machine is powered by a 7.5 kW main motor and operates on three-phase power at 50 Hz. With overall dimensions of approximately 4,500 × 2,450 × 2,450 mm (L × W × H) and a total weight of around 8,000 kg, the Churchill U 3615 is a solid and dependable solution for heavy-duty gear manufacturing. Manufactured in 1966, this machine is fully functional, ready for operation, and supplied with a full set of change gears, technical passport, and operator’s manual, making it well suited for workshops seeking a proven and durable gear hobbing solution. Overall, the Churchill U/PH 3615 offers: -Heavy-duty, industrial-grade build quality -Large part capacity and flexible travel ranges -Adjustable spindle speeds and feed rates -Reliable operation for continuous gear production

Condition: ready for operation (used), Year of construction: 1959, functionality: fully functional, machine/vehicle number: 80, total height: 1,900 mm, overall weight: 2,500 kg, total width: 2,200 mm, total length: 1,500 mm, power: 5 kW (6.80 HP), TECHNICAL DETAILS Power: 5 kW MACHINE DETAILS Drive system: Conventional Dimensions & Weight Dimensions (L x W x H): 1,500 x 2,200 x 1,900 mm Unladen weight: 2,500 kg Gbodpjzrmvtefx Am Aer Number of transport packages: 3 EQUIPMENT Documentation New Dathan knife sets Tools Measuring accessories

Condition: good (used), Year of construction: 2001, Equipped with: Power Stock Fanuc 5-Axis CNC Control 160M 400mm Honing Wheel X Axis Pulse Generator Coolant System w/Twin Filters Magnetic Chip Separator Honing Tool Set up for Last Job is Still in Machine Internal Diameter of Honing Tool on Machine is 14" Work Light Power Door Auto Dress 5-Part Program Instruction Book for 16M Control Instruction Book for Set-Up and Operation Specifications: Maximum Outer Diameter: 250 (350) Minimum Outer Diameter: 30 Maximum Overall Length: 400mm Maximum Tooth Width: 45mm Module: 1.0-3.0 Cross Feed Device(Z Axis): 430mm Max. Travel Honing Wheel Cutting Feed Device(X Axis): 370 Max. Travel Honing Wheel Swing Device(C Axis): Swing Angle: +30 Degress Honing Wheel Rotation Drive Device(A Axis): Honing Wheel Spindle Speed R/Min: 500 Honing Wheel Outer Dia.: 300 (400) Maximum Honing Wheel Width: 50mm Crowning Device (Y Axis): Gedpfjrualpsx Am Asbr Maximum Rocking Angle: 1.6 Degrees Motor Types: Z-Axis Drive Motor: 1.8Kw X-Axis Drive Motor: 1.8Kw Y-Axis Drive Motor: 0.7Kw C-Axis Drive Motor: 1.8Kw A-Axis Drive Motor: 2.2/3.7Kw Maximum Distance Between Centers: 600mm Center Height: 1,100mm Floor Space: 2,170W X 2,800D X 2,100H Mass Of Machine: 4,500Kg

Condition: good (used), workpiece diameter between centers: 2,286 mm, The No. 61 Angular Hypoid Tester is designed to test large bevel and hypoid gears up to 90" diameter and with shaft angles from 0 - 135 degrees. Spur, helical and internal gears can also be accommodated. The drive or pinion spindle can be rotated in either direction at a recommended spindle speed of 600 RPM. It is mounted in a head which is vertically adjustable on a column, so that the spindle can be offset either above or below the center line of the gear spindle for testing hypoid gears. The pinion head column is adjustable angularly in a horizontal plane to permit testing of gears of any shaft angle from 0 - 135 degrees. Specifications: Centerline of Drive Spindle to Nose of Brake Spindle (90 degrees shaft angle and without face plate): 38-1/2" Max. / 7-5/8" Min. Centerline of Brake Spindle to Nose of Drive Spindle (90 degrees shaft angle and without face plate): 60" Max. / 10" Min. Centerline of Brake Spindle to Nose of Drive Spindle (90 degrees shaft angle and with 54" face plate): 60" Max. / 28" Min. Gjdpfx Amjrtrzds Aebr Centerline of Brake Spindle to Centerline of Drive Spindle (For Spur Gears): 56" Max. / 6" Min. Distance Between Nose of Brake Spindle and Nose of Drive Spindle (for spur gears): 36-1/2" Max. / 0" Min. Offset of Drive Spindle Either Above or Below Centerline of Brake Spindle: 10" Range of Shaft Angles: 0 - 360 Degrees Maximum Diameter of Gear: 90" Diameter of Face Plate: 54" Outboard Bearing: 3" Diameter Hole Spindles: RPM of Drive Spindle Pulley Set No. 1: 100 - 400 RPM of Drive Spindle Pulley Set No. 2: 250 - 600 Diameter of Taper Hole (large end): 6" Taper Per Foot: 3/4" Depth of Taper: 8" Hole Through Spindle: 5-1/2" Net Weight of Machine: 20,000# Net Weight of Machine W/Outboard Support and Bed Plate: 24,000#

Condition: like new (used), Year of construction: 2017, max. wheel diameter 100 mm gear width 26 mm max. module 31 min. module 0,1 Control Siemens 840 D SL Number of working hours 9598 h total power requirement 45 kW weight of the machine ca. 7,8 t dimensions of the machine ca. 4,40x3,95x3,01 m Gleason 100S gear shaping machine for the production of internally and externally toothed cylindrical gears and other cylindrical workpiece circumference regularly occurring profiles and moulds as well as for the production of profiles using the single part process. Technical data: Nominal workpiece diameter 100 mm Gedpfev Ehbbsx Am Asbr Largest circumferential diameter 150 mm Machine nominal module approx. 3 mm (Guide value depending on the respective machining task.) Shaping spindle stroke speed range 0 - 3,000 1/min Stroke position adjustment range (manual) 20 mm Largest toothing width 26 mm Smallest pitch height of the hydrostatic inclined guide 400 mm Smallest/largest distance between tool axis - 20/+ 180 mm and workpiece axis Stand inclination range (manual) - 1/+ 11° Tool holder (manual clamping) HSK-D63 (hollow shank taper according to DIN 69063) Weight of the machine approx. 7,000 kg with robot cell

Condition: good (used), Year of construction: 2007, max. wheel diameter 500 mm gear width 200-400 mm module 12 turning speeds 0-3250 U/min bracke pressure bis max. 95 Nm inner taper Konus #39 Control Fanuc 16 total power requirement 15 kW weight of the machine ca. 6 t dimensions of the machine ca. 2.350 x 2.240 x 2.500 mm HIGHLY FLEXIBLE TESTING OF HARD, FINISHED AND GREEN SPIRAL BEVEL AND HYPOID GEAR SETS The T 60 bevel gear testing machine is a CNC testing machine with three linear axes for the fully automatic hard and soft testing of spiral bevel and hypoid gear sets with a 90° axis angle. It offers versatile objective and subjective testing options with speeds up to 3,250 min and braking torques up to max. 95 Gjdpfx Amsvr Hf Ej Aobr Nm.

Condition: good (used), Year of construction: 2002, Clampable cutter head type (max.) 460 mm Cutter head weight (max.) 150 kg Mounting disc diameter for cutter heads (Ø) 360 mm Mounting cone for cutter heads Nominal diameter Ø 58,227 mm travel -z axis 200 mm diagram-drawing enlargement ±10 - ± 500 µm weight of the machine ca. 2,3 t dimensions of the machine ca. 2 x 1,5 x 2,03 m In the manufacturing process for spiral-toothed bevel gears, the quality of the gear cutting gear cutting tools used plays a decisive role. Particularly in high gear cutting quality and a long service life can only be achieved with precisely can only be achieved with precisely adjusted cutterheads. The Oerlikon cutterhead setting and testing device CS 200 enables quick and easy setting of the individual knives and simple adjustment of the individual knives, it checks the position and documents the measurement results. The measuring sequence on the CNC-controlled testing device is partially automated: The individual actions for carrying out the actions for carrying out the sequence are displayed on the screen via the operator guidance. The positioning of the individual knives in the cutter head and the height of the knife tips is largely automatic thanks to a special sequence and is simultaneously documented by means of a run-out diagram. A subsequent measuring sequence checks the radial position of the inner and outer cutting edges of all knives in the cutterhead. If individual test parameters on the knives do not correspond to the the tolerance specifications, this can be individually repositioned. The combination of semi-automated setting sequence, operator-guided set-up actions and automatic operator-guided set-up actions and automatic measuring sequence, cutterheads can be can be set conveniently, quickly and with high precision. Operator-guided setting and test sequence - Graphic display of the cutter head design and the measurement results with tolerance check - Instructions for the operator in plain text Instructions for the operator in Gsdpfxow N S E Ae Am Aebr plain text (without coded information) - Simple assignment of the measurement results to the knives - Documentation of the setting and measurement results via printer- Setting and test sequence suitable for ARCON®, RSR, Spirapid, SPIRON®, TRI-AC® types - Interface for neutral data

Condition: good (used), weight of the machine ca. 5,5 t Table tip diameter: 35 mm Tip height above table: 75 mm Counterholder tip diameter: 50 mm Counterholder tip stroke: 40 mm Minimum center-to-center distance: 20 mm Minimum measuring height above table: 50 mm Maximum measuring height above table: 550 mm Table diameter: 260 mm Base circle diameter: 0–630 mm Gbedpfx Aozidz Uom Ajr Maximum rolling path: ±115 mm Maximum workpiece weight: 300 kg X-axis: 230 mm Y-axis: 370 mm Z-axis: 500 mm Max. workpiece diameter: 630 mm Software for new PCs: Windows 11 Bevel gear software, if desired, available only on Metrotek installations Additional information: - Machine calibrated according to DAKKS on November 19, 2017

Condition: good (used), Year of construction: 1992, weight 5,5 t Table tip diameter: 35 mm Tip height above table: 75 mm Counterholder tip diameter: 50 mm Counterholder tip stroke: 40 mm Minimum center-to-center distance: 20 mm Minimum measuring height above table: 50 mm Maximum measuring height above table: 800 mm Table diameter: 500 mm Base circle diameter: 0–1000 mm Maximum rolling path: ±115 mm Maximum workpiece weight: 2000 kg X-axis: 230 mm Y-axis: 530 mm Z-axis: 750 mm Max. workpiece diameter: 1000 mm Gbodpfjzidz Iox Am Ajr Software for new PCs: Windows 11 Bevel gear software, if desired, available only on Metrotek installations Additional information: - Machine calibrated according to DAKKS on November 19, 2017

Condition: refurbished (used), functionality: fully functional, Refurbished milling head from Pfauter PE150. Gbodpfx Aszr Hc Tem Aor

Condition: good (used), Year of construction: 1998, Max. Pitch circle diameter External gearing 300 mm Max. Pitch circle diameter internal gearing 300 mm Max. Outer diameter of workpiece (equipment) 450 mm max. module 6 gear hobbing width -max. 100 mm Max. Helix angle (with tool Ø 125 mm) +/- 45 ° strokes - infinitely variable 130 - 1300 Hub/min workpiece weight 1000 kg Minimum distance table top - tool spindle -55 / +300 mm Maximum distance table top - tool spindle 200 mm Maximum distance table top - tool spindle 350 mm Manual Upright side shift +/- 25 mm Manual swivelling angle of the tool spindle +/- 0,5 ° Max. Tool speed 15 UpM Max. Workpiece speed 27 UpM Max. Tool diameter 7 Zoll voltage 400 V frequency 50 Hz Gbsdpevu E Nujfx Am Aer Max. Line power 70 A total power requirement 48 kW weight of the machine ca. 11 t dimensions of the machine ca. 4,27 x 3,11 x 2,87 m taper in main spindle SK 45 table hole 40 mm control Siemens Sinumerik 840 C Gleason PFAUTER gear shaping machine Mod. PSA 300 The CNC modular gear shaping machine with skiving cutter for the machining of external and internal cylindrical gears, with straight or helical involute with straight or helical involute toothing, as well as any other profile splitting process. The work cycle is controlled by a CNC unit, with specific software for machining the gears, machining. Field of application --> The PSA 300 has been designed for the production of: - Gears with straight external teeth - Gears with straight internal teeth - Gears with external helical teeth - Gears with internal helical teeth