Beli Weiler Primus bekas (185)

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Mesin bubut Weiler Primus dalam kondisi terbaik. Dapat dilihat saat tersambung listrik. Data teknis: Jarak antar senter: 450 mm Tinggi senter: 120 mm Lubang spindle: 23 mm Kecepatan putar: 30 – 3000 rpm Tailstock: MK 2 Daya penggerak: 1,5 kW Pedpfoxzi I Dex Ab Ierd Berat: 350 kg Dimensi: 1200 x 650 x 1550 mm

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Weiler Primus Lead and Feed Screw Lathe from Training Workshop!!! Technical Data: >> Year of manufacture: approx. 1985 >> Centre height: 120 mm >> Distance between centres: 430 mm >> Spindle speeds: 60 - 3000 rpm in 18 geared steps >> Spindle bore: 23 mm >> Short taper spindle nose KK4 DIN 55027 >> Tailstock MK 2 >> Feeds from 0.03 to 0.15 mm/rev Prsdsu Aftgepfx Ab Isd >> Possible threads: metric, imperial, module, and diametral pitch >> Metric thread pitches from 0.25 to 2.5 mm >> Weight approx. 360 kg >> Length 1.2 m, Height 1.3 m, Depth 0.65 m Accessories and Equipment: >> 1 piece 160 mm 3-jaw chuck with 1 set of jaws >> 1 piece new 125 mm 3-jaw chuck with 2 sets of jaws >> Collet attachment with collets from 1 mm to 20 mm in 1 mm increments >> Multifix size A with 3 tool holders >> Stop >> Change gears About the machine: For sale is a Weiler Primus lead and feed screw lathe in very good condition. The machine is, of course, fully functional. All slides move very smoothly and evenly. Even at high speeds, the Weiler runs quietly. The Primus was located in a training workshop. This newer generation of Weiler lathes is very user-friendly and allows for surfaces to be produced as if ground. Take the opportunity to inspect this machine under power on site and see its condition for yourself.

Kondisi: siap digunakan (bekas), en-001 Psdpexw R N Uofx Ab Isrd

Kondisi: sangat baik (bekas), Parallel lathe WEILER Typ PRIMUS Zwischen Spitzen: 400 mm Max. Drehdurchmesser über Bett: 250 mm Max. Drehdurchmesser über Planschlitten: 130 mm Psdpfx Absxnp I De Isrd Spindeldurchlass: 24 mm Multifix Schnellwechselrevolver Typ A Dreibackenfutter Ø 155 mm Gewindeschneiden: Metrisch + Whitworth Reitstock MK2 HEIDENHAIN Digitalanzeige ND522 Automatische Vorschübe auf 2 Achsen Neues Schaltschrank Lieferumfang: 1 Vierbackenfutter Ø 155 mm, 4 Werkzeughalter, 1 Bohrfutter Anschluss: 380 V Abmessungen (L x B x H): 1300 x 900 x 1900 mm Gewicht: ca. 500 kg Maschine in SEHR GUTEM ZUSTAND

Tahun pembuatan: 1986, Kondisi: bekas, Weiler Primus lathe, year of manufacture approx. 1986, three-jaw chuck, Multifix toolpost. The machine is in good condition and can be demonstrated under power by prior arrangement. Prsdpfx Abjn Ard De Iod

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Weiler Primus Lead and Feed Screw Lathe from Training Workshop!!! Technical Data: >> Year of manufacture: approx. 1985, Machine No. 1191 >> Centre height: 120 mm >> Distance between centres: 430 mm >> Spindle speed: 60 - 3000 rpm, 18 gear stages >> Spindle bore: 23 mm Prodpfx Aovtp Edob Isd >> Short taper spindle nose KK4 DIN 55027 >> Tailstock: MT 2 >> Feeds: 0.03 to 0.15 mm/rev >> Thread cutting: metric, imperial, module, and diametral pitch threads possible >> Metric thread pitches: 0.25 to 2.5 mm >> Weight: approx. 360 kg >> Length: 1.2 m, height: 1.3 m, depth: 0.65 m Accessories and Equipment: >> 1 piece 3-jaw chuck 125 mm with 2 sets of jaws >> Collet chuck with 18 collets >> Multifix size A with 3 tool holders >> Stop >> Electrical spindle guard About the Machine: Offered here is a Weiler Primus lead and feed screw lathe in very good condition. The machine is, of course, fully functional. The slides all run very smoothly and evenly. Even at high speeds, the Weiler runs quietly. The Primus was located in a training workshop. This newer generation of Weiler lathes is very user-friendly, and surface finishes similar to grinding can be achieved. Take the opportunity to inspect this machine under power on site and see the condition for yourself.

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Weiler Primus LZ/G Lead and Feed Screw Lathe in Special Light Grey Paint Finish!!! Technical Data: >> Year of manufacture: approx. 1990, Machine No. 3150 >> Center height: 120 mm Pjdpfx Ajvivmyjb Iord >> Distance between centers: 430 mm >> Spindle speed: 60 - 3000 rpm in 18 geared steps >> Spindle bore: 23 mm >> Short taper spindle nose according to DIN 4 >> Tailstock Morse Taper 2 (MT2) >> Feeds from 0.03 to 0.15 mm/rev >> Thread cutting: Metric, Inch, Module, and Diametral Pitch threads possible >> Metric pitch range: 0.25 to 2.5 mm >> Switchable spindle brake >> Weight: approx. 360 kg >> Dimensions: Length 1.2 m, Height 1.3 m, Depth 0.65 m Accessories and Equipment: >> 1 new 3-jaw chuck, 125 mm, with 2 sets of jaws >> Multifix size A with 2 tool holders >> New collet chuck system with collets from 3 to 26 mm, in 1 mm increments (new) About the Machine: Offered here is a Weiler Primus lead and feed screw lathe in very good condition. The machine is, of course, fully functional. The slides run smoothly and evenly. The bedways are in very good condition. The Primus was used in a training workshop. This newer generation of Weiler lathes is highly user-friendly and allows for producing ground-like surface finishes. Take the opportunity to inspect this machine under power on-site and convince yourself of its condition.

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Weiler Primus GS Lead and Feed Screw Lathe in Excellent Original Condition!!! Technical Data: >> Year of manufacture: approx. 1992, Machine No. 4549 >> Centre height: 120 mm >> Centre distance: 430 mm >> Spindle speeds: 60 - 3000 rpm, 18 gear steps >> Spindle bore: 23 mm >> Short-taper spindle nose DIN 4 >> Tailstock: Morse taper 2 >> Feeds from 0.03 to 0.15 mm/rev >> Possible threads: metric, imperial, module, and diametral pitch >> Metric thread pitches from 0.25 to 2.5 mm >> Switchable spindle brake >> Weight approx. 360 kg >> Dimensions: Length 1.2 m, Height 1.3 m, Depth 0.65 m Accessories and Equipment: >> New collet attachment, new collets from 3 to 25 mm >> 1 three-jaw chuck with 2 sets of jaws >> Multifix size A with 2 tool holders About the Machine: Predpfx Abowkh Abs Isd This offer is for a Weiler Primus GS lead and feed screw lathe in excellent original condition. The machine is, of course, fully functional. All slides run very smoothly and evenly. The bed ways are in top condition. Even at high speeds, the Weiler runs very quietly. The Primus was used in a training workshop. This newer generation of Weiler lathes is very user-friendly and allows for producing ground-like surface finishes. Take the opportunity to inspect this machine under power on site and see its condition for yourself.

Kondisi: bekas, L + Z lathe WEILER Type LZ PRIMUS GS Machine No. 2461 Year of manufacture approx. 1990 Centre distance: 400 mm Swing over bed: 250 mm Centre height over bed: 125 mm Swing over cross slide: 140 mm Centre height over cross slide: 70 mm Spindle bore: 24 mm Spindle speed: 60 - 3000 rpm, 18 steps Feeds: longitudinal and cross Chuck flange: short taper DIN 55022 size 4 Tailstock taper: MK 2 Drive power: 1.1 kW and 1.5 kW, pole-changeable Power supply: 380 Volt, 50 Hz - 3-axis digital readout FAGOR, type 30i-T-B - Spindle speed via 2 motor speeds and 9 gear steps - 3-jaw chuck RÖHM Ø 125 mm with stepped jaws - QUICK-CHANGE TOOLPOST MULTIFIX with 1 exchangeable cassette - Collet set Ø 1 / 3 / 4 / 5 / 7 / 8 / 10 / 14 / 15 / 16 / 17 / 19 / 20 mm - 1 centering point for collet holder - Emergency stop - Folding chuck guard - Splash guard - Machine light - Electrical diagram - Machine mounted on steel plate (steel plate L x W x H 1200 x 500 x 30 mm, 140 kg) Prsdertd Uwspfx Ab Ied Required space (L x W x H): 1200 x 900 x 1560 mm Weight: 520 kg Good condition

Kondisi: sangat baik (bekas), WEILER PRIMUS Tipe MD-G - Ketinggian senter: 125 mm - Jarak antara senter: 400 mm - Rentang kecepatan putar: 40–3000 rpm - Lubang spindle: 24 mm - Pelindung chuck elektrik - Multifix dengan sisipan - Tailstock dengan pinol bor Predpoxw H Dbofx Ab Iod - Chuck empat rahang - Lampu kerja - Pembatas ranjang - Dokumentasi Dimensi: P x L x T: 1,3 x 0,8 x 1,6 meter / Berat: 450 kg Kesalahan dan kekeliruan informasi dapat terjadi.

Kondisi: siap digunakan (bekas), Tahun pembuatan: 1989, Fungsionalitas: berfungsi sepenuhnya, For sale: Lathe manufactured by Weiler, model Primus LZ-GS Prsdpfeihig Iex Ab Iod The machine is in very good condition. Technical specifications: - Year of manufacture: 1989 - Machine No.: 4443 - Operating voltage: 380 V - Centre height: 120 mm - Centre distance: 430 mm - Spindle speed: 60 - 3000 rpm, 18 gear steps - Spindle bore: 23 mm - Short taper spindle nose DIN 55027 - Tailstock Morse taper 2 - Feed rates: 0.03 to 0.15 mm/rev - Thread cutting: Metric, imperial, module, and diametral pitch - Metric thread pitch: 0.25 to 2.5 mm - Length: 1.2 m, Height: 1.3 m, Depth: 0.65 m Prices plus VAT Inspection possible by appointment. Please contact us—our team is pleased to assist you. Trade-in or exchange possible! Machinery Purchase / Sale PURCHASE / SALE OF PRODUCTION & METALWORKING MACHINES AND MORE. Are you looking for a high-quality yet affordable metalworking machine for your production facility, or do you want to sell yours? For more information or contact options, visit our website.

Kondisi: baik (bekas), Tahun pembuatan: 2000, Weiler Primus VC, year of manufacture 2000, digital readout, centre distance 500 mm, max. swing over cross slide 150 mm, spindle speed up to 4,000 rpm, spindle bore 40 mm, spindle drive 1.5 kW, Multifix tool holder, 24 longitudinal feeds, metric threads, imperial threads, Pedov Ifxijpfx Ab Ijrd

Kondisi: bekas, Tahun pembuatan: 1999, Turning diameter 150 mm Turning length 500 mm Total power requirement 4 kW Machine weight approx. 0.8 t O F F E R We can offer you, subject to prior sale and errors excepted, ex stock and without obligation: W E I L E R LZS - Universal Lathe with Digital Readout Model: PRIMUS VC Year of manufacture: 1999 Podpfx Aevm Dv Deb Ijrd _____ Center height: 140 mm Max. turning diameter over cross slide: 150 mm Max. swing diameter over bed: 280 mm Distance between centers: 500 mm Spindle bore: 40 mm Infinitely variable speed: 30 - 4,000 rpm 24 longitudinal feeds: 0.02 - 0.63 mm/rev 24 facing feeds (longitudinal feeds x 8): 0.006 - ... mm/rev Metric threads: mm/pitch Imperial threads: 80 - 2 tpi Module threads: Module Spindle drive: 1.5 kW Total drive: 4 kW - 380 V - 50 Hz Weight: 800 kg Accessories / Special features: • SIEMENS 3-axis digital display for X-axis, Z-axis, and compound (summed Z-axis) • Multifix-A quick-change tool holder • Equipped with a 3-jaw chuck from WEILER, 140 mm diameter, mounted • Machine base for tool storage with integrated electrical cabinet, coolant system • Operating manuals Condition: Very good – demonstration ready. Ideal for training workshops. Delivery: ex stock – as inspected Payment: strictly net upon collection after receipt of invoice We look forward to your order. Further lathes of all sizes are available from stock – please contact us for more information.

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Weiler Primus GS Lead and Feed Screw Lathe with 3-Axis Digital Readout Easson-ES8 From Training Workshop – Excellent Condition! Technical Data: • Year of Manufacture: approx. 1990 Machine No. 3768 • Centre Height: 120 mm • Centre Distance: 430 mm • Spindle Speeds: 60 – 3000 rpm in 18 gear steps • Spindle Bore: 23 mm • Short Taper Spindle Nose DIN 4 • Tailstock Taper: MK 2 • Feeds: from 0.03 to 0.15 mm/rev • Thread Types: Metric, Imperial, Module, and Diametral Pitch • Metric Thread Pitches: from 0.25 to 2.5 mm • Weight: approx. 360 kg • Dimensions (LxHxD): 1.2 m x 1.3 m x 0.65 m Equipment and Features: • 3-Axis Digital Readout by Easson ES8 • Collet chuck system 1–20 mm, 1 mm increments, incl. draw tube • 1 Three-jaw chuck with 2 sets of jaws • 1 Four-jaw chuck with 2 sets of jaws • Multifix size A with 3 tool holders Prjdpfx Abjvkfhps Ijd • Bed stop • Steady rest About the Machine: For sale is a Weiler Primus lead and feed screw lathe, built circa 1990, in outstanding condition. The machine is, of course, fully functional. All slides move smoothly and evenly, and the bedways are in very good condition. Even at high speeds, the Weiler runs quietly. The machine comes from a major company’s training workshop. This newer generation of Weiler lathes is very user-friendly and allows for ground-like surface finishes. Take the opportunity to inspect the machine on site under power and convince yourself of its condition.

Kondisi: bekas, Swing diameter over bed: 250 mm Swing diameter over cross slide: . mm Distance between centers: approx. 400 mm Center height: approx. 125 mm Psdpfx Abowa Dz Eo Iord Spindle speed range: 80 – 3,000 rpm Number of speed steps: 18 Spindle bore: 24 mm Tailstock quill taper: MT 3 Weight: approx. 400 kg Dimensions (L x W x H): approx. 1,200 x 650 x 1,300 mm Four-jaw chuck diameter: 125 mm Including Röhm four-jaw chuck, Ø 125 mm with drilling and turning jaws; Collet chuck device incl. collets 1–20 mm in 1 mm increments; Multifix size A with 3 quick-change tool holders; Chuck guard with safety interlock

Kondisi: baik (bekas), Jarak antara ujung: 450 mm Tinggi ujung: 120 mm Lubang spindle: 23 mm Kecepatan: 40 – 3000 rpm Penggerak variabel kontinu dengan 3 tingkat transmisi & tampilan kecepatan digital Tailstock: MT 2 Daya penggerak: 1,5 kW Berat: 350 kg Dimensi: 1200 x 650 x 1330 mm Prjdpfx Aew I A Uxsb Iod Pewarnaan: Reseda hijau RAL 6011 Tampilan digital: Opsional dengan biaya tambahan Aksesori: Aksesori lainnya tersedia sesuai permintaan

Kondisi: diremajakan ulang (bekas), Tahun pembuatan: 2007, Universal lead and feed screw lathe Make: WEILER Model: Primus VC Year of manufacture: 2007 – overhauled Newly painted in RAL 7035 light grey Machine no.: CK17 Centre height: 140 mm Centre distance: 500 mm Spindle bore: 40 mm Prjdpfxev D Ip Nj Ab Ied With warranty Geometric inspection with test report Accessories: - 3-axis digital readout SIEMENS - Chuck guard with electrical interlock - Braked drive motor - Quick-change tool post, base body size A - Bed stop - Covered lead and feed screw - Chip guard to the rear - Removable chip tray - Operating manual - Used, as seen -

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, lubang spindel: 40 mm, tinggi pusat: 140 mm, panjang pembubutan: 500 mm, kecepatan spindel (maks.): 4.000 rpm, kecepatan spindel (min.): 30 rpm, kecepatan rotasi (maks.): 4.000 rpm, kecepatan rotasi (min.): 30 rpm, Perlengkapan: kecepatan rotasi dapat diubah tanpa batas, Centre distance: 500 mm Centre height: 140 mm Prsdpfx Abevnr E No Isd Spindle bore: 40 mm Spindle speed: 30 - 4000 rpm Weight: approx. 800 kg Dimensions: approx. 1430 x 935 x 1550 mm Accessories: operator's manual, lamp, Multifix tool holder, collet chuck (at extra cost) Further accessories available on request

Kondisi: siap digunakan (bekas), Tahun pembuatan: 2006, Fungsionalitas: berfungsi sepenuhnya, nomor mesin/kendaraan: 864, tinggi pusat: 140 mm, lebar di tengah: 500 mm, Machine from the insolvency of an automotive supplier – machines are currently still in operation! TECHNICAL DETAILS Digital display: available Control: Siemens Sicomp IMC 05 Centre height: 140 mm Centre distance: 500 mm Clamping system Three-jaw chuck: available Quick-change tool holder: available Tailstock Type: available Further specifications as per manufacturer – subject to verification Centre distance: 500 mm Centre height: 140 mm Swing over bed: 280 mm Swing over cross slide: 150 mm Main spindle Spindle head to DIN ISO 702-3: Size 5 Spindle diameter in front bearing: 70 mm Prsdpsv N Iniefx Ab Iod Spindle bore: 43 mm Internal taper depth of main spindle: 50 mm Main drive Drive power (100% duty cycle): 4 kW Speed range: 30 – 4,000 rpm Number of gear ranges: 1 Number of speed stages: stepless Feed drive Number of feeds: 24 Feed range longitudinal/cross: 0.02 – 0.63 mm/rev / 0.006 – 0.2 mm/rev Thread cutting range Metric threads: 0.25 – 8 mm Inch threads: 80 – 2 TPI Tailstock Quill diameter: 40 mm Quill stroke: 85 mm Quill taper: MT 3 Machine dimensions Length x width x height: 1,570 x 890 x 1,700 mm Weight: 1,050 kg

Kondisi: sangat baik (bekas), Tahun pembuatan: 2003, Fungsionalitas: berfungsi sepenuhnya, Weiler Primus VC Precision Centre Lathe, 3-Axis Digital Readout K&C NEW with VC Drive, stepless speed control, and CE conformity – very good condition Technical Data: >> Year of manufacture: 2003, Machine No. 646 >> Centre height: 140 mm >> Centre distance: 500 mm >> Spindle speeds: up to 4,000 rpm, stepless >> Spindle bore: 40 mm >> Short taper spindle nose DIN 55027 size 5 with bayonet lock >> Tailstock: Morse taper MK 3 >> Feeds: from 0.02 to 0.63 mm/rev >> Possible threads: metric, inch, module, and diametral pitch >> Metric thread pitches from 0.25 to 8 mm >> Weight: approx. 800 kg Prsdpfew Idllox Ab Isd >> Spindle brake can be engaged >> Machine dimensions: approx. 1.4 m x 1.55 m x 0.95 m Accessories and Equipment: >> 3-axis digital readout K&C NEW >> Collet system with collets from 3 to 26 mm, 1 mm increments, NEW >> 160 mm 3-jaw chuck with 2 sets of jaws >> Multifix size A with 2 tool holders >> Electric chip guard >> Machine feet >> Splash guard About the machine: Offered is a Weiler Primus VC lead and feed screw lathe, year of manufacture 2003, in very good original condition. This is a very well-maintained lathe with VC drive and stepless spindle speed control. The digital readout and scales by K&C are brand new. This newer generation of Weiler lathes is highly user-friendly and allows for ground-like surface finishes. The K&C digital readout makes operation even easier and more precise. You are welcome to inspect and test the machine under power on site to verify its condition.

Kondisi: sangat baik (bekas), Fungsionalitas: berfungsi sepenuhnya, Weiler Primus Lead and Feed Shaft Bench Lathe in Excellent Condition!!! Technical Data: >> Machine No. 2801 >> Centre Height: 120 mm >> Centre Distance: 430 mm >> Speed Range: 60 – 3000 rpm in 18 gear steps >> Spindle Bore: 23 mm >> Short Taper Spindle Nose DIN 55027 >> Tailstock MT 2 >> Feeds from 0.03 to 0.15 mm/rev >> Thread cutting options: Metric, Inch, Module, and Diametral Pitch >> Metric thread pitches from 0.25 to 2.5 mm >> Dimensions: Length 1.2 m, Height 1.3 m, Depth 0.65 m Accessories and Equipment: Pedev Tyzcopfx Ab Ierd >> 1 piece Röhm 3-jaw chuck 125 mm with 4 sets of jaws >> Collet clamping device with collets from 2 mm to 12 mm in 1 mm increments with draw tube >> Multifix size A with 4 tool holders >> Change gears >> Fixed steady >> Faceplate >> Spindle guard >> Clamping tools About the Machine: For sale is a Weiler Primus lead and feed shaft bench lathe in very good condition. The machine is, of course, fully functional. All slides run very smoothly and evenly. Even at high speeds, the Weiler runs quietly. The Primus comes from a government-operated facility where it saw little use. This newer generation of Weiler lathes is very operator-friendly and allows for ground-like surface finishes. Take the opportunity to inspect this machine under power on site and see its condition for yourself. (The base cabinet is included; it is not bolted to the machine.) Digital readout available at extra cost.

Kondisi: sangat baik (bekas), Tahun pembuatan: 2011, de Podjw Ebdbopfx Ab Isrd

Kondisi: baik (bekas), WEILER Commodor B Lathe Year: 1987 with HEIDENHAIN 3-axis digital readout Centre height: 190 mm Centre distance: 950 mm Swing over cross slide: 190 mm Spindle bore: 56 mm Spindle speeds: 25–2,000 rpm Number of speed steps: 18 Motor power: 2/4 kW Longitudinal feeds: 0.022–0.8 mm/rev Cross feeds: 0.011–0.4 mm/rev Predpfexz Rc Nex Ab Iod Number of feeds: 200 Metric thread pitches: 0.3–10 mm Weight: approx. 1,500 kg Dimensions (LxWxH): 2,350 x 1,000 x 1,450 mm All technical data subject to change. This machine is ideal for users requiring a large spindle bore. Accessories / Equipment: - 3-axis HEIDENHAIN digital readout - Independently adjustable faceplate - Electrically interlocked chuck guard - Multifix quick-change tool post, size “B” - Machine lamp - Coolant system - Rear chip guard - 2 emergency stop buttons - Bed stop - Additional accessories as available (drill chuck, live centers, tool post cassettes, etc.) Available from March 2026 from vocational training center Condition: good to very good

Kondisi: sangat baik (bekas), Tahun pembuatan: 2006, Tinggi pusat: 160 mm Jarak pusat: 650 mm Pjdpfjw Sn Irex Ab Ierd Kecepatan spindle: 2.500 min-1 Multifix Kepala lepas Aksesoris

Tahun pembuatan: 2006, jam operasional: 64.831 h, Kondisi: siap digunakan (bekas), Unit Kontrol Merek: SIEMENS Model: SINUMERIK 840 D Penggerak Utama Lubang spindle: 165 mm Benda Kerja Pedpfxjxzlv Rs Ab Iord Diameter benda kerja di atas tempat tidur: 1200 mm Berat benda kerja: 6000 kg Dudukan Ekor Diameter pinol: 140 mm Jarak gerak pinol: 300 mm Tirus alat pinol: MT 6 Weiler E120x2000 ini diproduksi pada tahun 2006. Dilengkapi dengan sistem operasi 400 V yang kuat, daya 55 kVA, serta mampu menangani benda kerja hingga 6000 kg. Dengan ayunan maksimum di atas tempat tidur 1200 mm dan jarak senter 2000 mm, sangat ideal untuk pekerjaan bubut skala besar. Termasuk konveyor serbuk dan chuck tiga rahang. Hubungi kami untuk informasi lebih lanjut mengenai mesin ini. Jenis Aplikasi Bubut