Used Servomac Ct 104D for sale (3,701)

Year of construction: 2004, condition: good (used), LBL Brenta Spaner CT 700 Max. cutting depth = 150 mm Max. cutting height = 650 mm Free central blade, overheating protection Clearance = 800 mm Fast, precise positioning via servomotor with electrical system. Gjdpfx Akoyuc Nieyekc

Condition: excellent (used), Year of construction: 2015, operating hours: 600 h, functionality: fully functional, machine/vehicle number: DB 5044Q01A, conveying length: 2,000 mm, working width: 1,300 mm, Powered roller conveyor with UV lamps for preheating, approximately 600 operating hours, in excellent condition. Gkedpfx Ajy Emldekyjc

Condition: used, Year of construction: 2021, operating hours: 733 h, JCB 8008 CTS mini excavator, manufactured in 2021, with only 733 operating hours! ----* Manufacturer: JCB * Model: 8008 CTS Gkjdpfjz R Hzfjx Akysc * Year of manufacture: 2021 * Recorded operating hours: approx. 733 * Operating weight: 950 kg * Includes 2 x buckets * Adjustable undercarriage * Good condition * Video available upon request (WhatsApp Erik) * Price: 9,500 euros, net + 19% VAT ----For further questions, please call: Erik Kortum: WhatsApp All information is provided without guarantee. Errors and prior sale are subject to change.

Condition: excellent (used), Year of construction: 2018, power: 7.5 kW (10.20 HP), input voltage: 400 V, input frequency: 50 Hz, planing width: 630 mm, overall weight: 1,100 kg, Felder Format-4 Thicknesser, model Exact63 – featuring Silent-Power spiral cutterblock and Digi-Drive. A high-quality industrial thicknesser from Austria, engineered for high precision, efficiency, and continuous operation. The machine combines robust construction with advanced technology and excellent ease of use—ideal for professional joinery workshops and industrial woodworking. Equipment and features: *Silent-Power spiral cutterblock – for efficient planing and a superior surface finish. *Digi-Drive digital table height adjustment – ​​simply enter the desired dimension, press start, and the table automatically adjusts to the exact height. *LED display – shows the set value and current table height. *4 programmable settings – for smooth and efficient operation. *Variable feed speed, 5–20 m/min – adjust the speed to suit the desired result, ranging from a fine finish to rapid material removal. *Table extension – provides better support when handling longer workpieces. *Segmented infeed roller. *Additional outfeed table. Gjdpfxsz R I Saj Akyekc Benefits: High precision and consistent planing results. Robust construction with high-quality components. High productivity during continuous operation. Advanced technology and user-friendly operation. Specifications: Working width: 630 mm Maximum planing height: 3–300 mm Motor power: 10 hp Feed speed: 5–20 m/min Year of manufacture: 2018 Premium machine in near-new condition. Transport across Europe can be arranged at a good price.

Condition: excellent (used), Year of construction: 2000, I sell the widebelt sanding machine Costa A CT 1150, year 2000. Configuration hard rubber cylinder - electronic segmented pad. Working width 1150mm Bands 1180x2620mm Pressure rollers for short elements. Air-blow on both units. Total weight 2300kg 2 motors 15 + 11 kW Additionally built brushing unit with bottom cleaning brush. Gsdpfx Ajg Trubekyskc Including full documentation. Condition LIKE NEW ! The machine was working only a few. Available immediately.

Year of construction: 1990, condition: ready for operation (used), A CNC lathe Gildemeister is available. Swing diameter over bed/face slide: 600mm/360mm, bed dimensions X/Y: 350mm/450mm, carriage length: 620mm, carriage width: 250mm, facing travel: 1100mm, chuck diameter: 315mm, spindle bore: 107mm, spindle diameter: 140mm, spindle power: 30kW, torque: 950Nm, speed: 3150rpm, rapid traverse X/Z: 10m/min/5m/min. Quill diameter: 100mm, quill stroke: 180mm, max. tailstock pressure: 1200daN, turning length: 1000mm. Machine dimensions X/Y/Z: approx. 4350mm/2050mm/2000mm, weight: approx. 6400kg, operating hours: 49811h. Documentation available. An on-site inspection is possible. Gkjdpfx Akjx R Duajysc

Condition: ready for operation (used), Year of construction: 1993, Automatic sander VIET Mod. Rita 4C EL Fixed plane moving heads Working width 1350 mm Working height 4 – 160mm Nr 03 suction hood depressors diameter 150 mm Belt feed speed 6 – 20 with 3 kw inverter Hood carpet cleaning brush diameter 120 mm Composition: 1st transversal polishing unit mod. TET 60 electronic pad 60 sectors Lamellar tape 6150 x 140 mm Our abrasive 8350 x 170 mm Velocity 5.6 – 26.2m/s Inverter kw 15 Three 140 mm diameter extraction hoods 2nd roller sanding unit mod. R320 – 40 rubber coating 40° SH Sanding belt 3250 x 1400 mm Speed 1.5 – 12.5m/s Inverter kw 15 Belt cleaning blower Two extraction hoods with a diameter of 140 mm and one with a diameter of 200 mm 3rd buffer polishing group mod. TE 60 electronic pad 60 sectors Sanding belt 3250 x 1400 mm Velocity 2.9 – 14.1m/s Inverter kw 15 Belt cleaning blower Two extraction hoods with a diameter of 140 mm and one with a diameter of 200 mm 4th cross sanding unit mod. TET 60 electronic pad 60 sectors Lamellar tape 6150 x 140 mm Our abrasive 8350 x 170 mm Velocity 5.6 – 26.2m/s Godpfoltlx Tox Akyskc Inverter kw 15 Three 140 mm diameter extraction hoods 5th scotch-brite group Engine kW 0.55 Suction hood diameter 140 mm 6th brush unit Engine kW 0.55 Suction hood diameter 140 mm 7th panel cleaning rotary blower group

Condition: ready for operation (used), Tool changer for Brother TC-225 machine with 5GN9K / 5RK40GN-CT motor - 1300/1550 rpm / 40W / 200V / 50/60Hz, used, minor signs of wear, 100% functional, scope of delivery as shown in the photos. PLEASE NOTE: Please request the costs for packaging and shipping separately! Gkedpfx Akez Ddubjyoc

Condition: used, mileage: 4,209 km, power: 302 kW (410.61 HP), fuel type: diesel, tire size: 385/65R22,5, axle configuration: 6x6, wheelbase: 4,580 mm, fuel: diesel, driver cabin: day cab, emission class: euro5, suspension: steel, Year of construction: 2010, General information Applicable material: Fuel Axle configuration Suspension: leaf suspension Front tyre size: 385/65R22,5 Rear axle 1: Tyre size: 315/80R55,5 Rear axle 2: Tyre size: 315/80R55,5 Weights Empty weight: 60 kg Carrying capacity: 12.970 kg GVW: 13.030 kg Interior Steering wheel placement: Left Other information Water tank volume: 16500 l Additional information Please contact Kristoff Van Havere for more information - LAG manufacture structure - Capacity 16500 liter - Automatic transmission - 6x6 - Only 4200km - Tanktrailer 16900 liter inclusiv Gedpfxez R Ivdj Akyekc

Condition: excellent (used), Year of construction: 2007, Striebig Panel Saw Compact 6220, year of manufacture 2007 Solid, self-supporting, firmly welded, and torsion-resistant saw frame Stable, durable saw beam steel construction Robust mounting of the motor carriage ensures high cutting precision Powerful, low-vibration 3.0 kW motor (S1) TRK dust extraction system Automatically adjusting aluminum slat grid with plastic supports Device for wall mounting Ball-bearing support rollers Split center support at optimal working height, with aluminum grid Integrated small parts support made of wood Supersilent sound insulation to reduce saw blade noise Electromagnetic motor brake Weight of the saw approx. 910 kg Cutting depth 60 mm Saw motor power 3.9 kW (5.3 hp) Saw blade diameter 250 mm Saw blade bore 30 mm *1 Emission sound pressure level at the workplace LpA 82 dB *2 Saw blade speed 5250 rpm 2 extraction ports ø 100 mm Connection value 4.8 kW Gsdpjz N Igaofx Akyokc Mains connection 3 x 400 V / 50 Hz Cutting range: L: 5600; H vertical: 2200 mm, H horizontal: 2100 mm Equipment: - Compact 6220 - Freestanding support, complete Location: Available from warehouse 54634 Bitburg - immediately available -

Condition: excellent (used), Year of construction: 2013, Engel Victory 330H/80V/160 combi Ecodrive / Production line with the Sepro SR S5-25 S3 Trans robot / Operating hours: approx. 18,000 h in automatic mode Year of construction: 2013 Injection unit: Screw diameter: 30 mm Injection weight: approx. 100 g Injection pressure: 2385 bar Dosing volume: 113 ccm Clamping unit : Clamping force: 160 t Distance between tie bars: 0x0 mm Size of the clamping plates: 750x750 mm Ejector: hydraulic Clamping unit: hydraulic Control: CC 200 - touch screen Additional equipment: 2K injection molding machine with rotary table and robot Tie-bar-less machine, hybrid: energy-saving, high-speed and very quiet Very good technical condition Operating hours: approx. 18,000 h in automatic mode Total number of operating hours: 24,312 h Euromap 67 Robot interface Air valve x 5 Hydraulic core pull x 5 Control unit with hot runners x 16 Reinforced injection units - bimetal Main motors - 2 x servo motor controlled with inverter Proportional valves on injection units - precise spraying Screw diameter in the vertical injection unit: ⌀22 mm - approx. 28 g/hp It is possible to purchase a turntable Robot Sepro SR S5-25 S3 Trans Year of construction: 2013 3-axis robot: 3 axes are driven by servomotors (electric): X, Y, Z (telescopic) Travel distances in axes approx.: X-2000, Y-1000, Z-1500 Automatic axis lubrication Touch control panel Gedpfez Ipqvjx Akyskc The safety package for robots Robot with adapter and protective housing Purchase of the robot for an additional charge Dimensions Weight: 8700 kg Length/width/height: 5.35x1.76x3.42 m All offered machines are started by our service technicians before sale. It is possible to obtain a video of technical tests of the selected machine or participate in live technical tests at our company in Łódź. Price: On request

Condition: excellent (used), Year of construction: 2014, functionality: fully functional, Maximum turning diameter: 465 mm Gksdpfx Aoz Ri U Ijkyoc Maximum swing diameter: 680 mm Control system: Siemens Travel range X-axis: 300 mm Travel range Z-axis: 1,050 mm Turning length: 1,050 mm Maximum spindle speed: 3,250 rpm Spindle bore: 76 mm Includes driven tools Number of positions in the tool turret: 12 stations Chuck diameter: 250 mm Maximum workpiece weight between centers: approx. 350 kg

Condition: good (used), Horizon BQ-270 Perfect Binder Machine in very good condition. Ready to use. Only 240,000 books used. Manufacturer’s description: Professional binder for perfect paperback binding. This fully automatic binder features an exceptionally sturdy design and is equipped with a hot glue gun, making it effective even for small and very small quantities of booklets or pages. The Horizon BQ-270 is a single-jaw binder with automatic cover feeding, which, operated by a single person, delivers impeccably bound books of consistently high quality. This model, equipped with a cover thickness scanner, allows for „on-demand” book binding. Speed ​​(sheets/h): 500 Gsdpfx Aksz R In Hoyekc – Ability to save repeat jobs – Sheet size: max: 320 x 310 mm; min: 135 x 115 mm – Cover size: max: 660 x 320 mm; min. 240 x 135mm – Book thickness: max. 50mm; min. 0.5mm – Cover weight range: 80–300g/m – Cover stack height: max. 70mm – Glue temperature: 100–200°C – Machine weight: 920.0kg – 3-phase power supply – Power consumption: 2.9kW – Capacity: 500 production cycles/h The kit includes documentation and glue.

Condition: good (used), Year of construction: 2013, fuel type: electric, Manitou 150 AETJ Compact Articulating Boom Lift / Work Platform 2013, 15.40m Working Height Gedpfx Aez Rvgdekyjkc Video can be sent via WhatsApp. Continuous stock, see website. Prices are ex Nuland. Van de Wert Trading B.V. has a varying stock of machines, trucks, trailers, and attachments. All our deliveries are at trade prices in AS-IS condition without warranties. (see our general terms and conditions) For a viewing and/or test drive, you can make an appointment without obligation. Please call in advance as we are not always present on site. Van de Wert Trading B.V. Bedrijfsstraat 3 5391 LR Nuland

Condition: good (used), axle configuration: > 3 axles, first registration: 08/2019, suspension: air, color: grey, Year of construction: 2019, Axle configuration Make axles: SAF Rear axle 1: Steering Rear axle 2: Steering Rear axle 3: Steering Weights Empty weight: 8.523 kg Carrying capacity: 53.477 kg GVW: 62.000 kg Condition Technical condition: good Visual appearance: good Additional information Please contact Arie or Pedro for more information = Additional options and accessories = - Air suspension - Disc brakes - EBS - Lift axle Gkjdpfx Ajz Dxpaskysc - Twist-locks = Remarks = D-tec CT-521-S / Combitrailer S-Line / 5 axles / SAF + Disc Brakes

Condition: used, mileage: 160,000 km, power: 265 kW (360.30 HP), first registration: 05/2004, fuel type: diesel, overall weight: 26,000 kg, emission class: euro3, Mercedes Benz Actros 2636 First registration: 05/2004 !!! Only 161,000 kilometers !!! Air conditioning 6x4 Meiller body Full steel - leaf/leaf suspension EPS 3 pedal German vehicle Chassis only / Only Chassis 32,999 € – visit our website: German/English/Serbian/Croatian/Bosnian/Bulgarian... Goran German/English/…? …? … Roman We will be happy to assist you with financing or leasing. EU sale: net price upon presentation of company documents and VAT number. VAT deposit: 2,000 € Our services for you: - Customs license plates - Export documents and EUR1 Gkjdpjz R H R Tjfx Akyec - Worldwide transport - Overnight accommodation - Transfer from Munich Airport or Passau train station

Condition: ready for operation (used), Year of construction: 2019, clamping force: 1,200 kN, total width: 2,200 mm, total height: 2,065 mm, overall weight: 8,450 kg, product length (max.): 5,259 mm, Hydraulic injection moulding machine manufactured in 2019. This Engel Victory 120 BMG features a clamping force of 120 t and a tie-bar-less design, ensuring efficient operation. It includes a high-speed injection unit and an advanced CC300 control system with a 21.5" full HD touchscreen. If you are looking to get high-quality injection moulding capabilities, consider the Engel Victory 120 BMG machine we have for sale. Contact us for further details regarding this machine. • Tie-bar-less design • Machine hours: on-time 2,767 h; estimated operating time ~200 h (never used for regular series production) • Oil filling: 300 L • Power supply: 3x400 V + N + PE / 50 Hz • Control system: CC300, 21.5" full HD touchscreen • Hydraulic system: ecodrive SHV3-HSI servo-hydraulic • High-speed injection with accumulator • Oil cooler: standard • Injection unit size: hydraulic 200 • Platen size: standard Euromap • Mould height: increased +200 mm • Opening stroke: extended +200 mm • Ejector system: platen ejector • Core pull: hydraulic and pneumatic • Cooling water connections: machine and mould separate • Flow regulator: 0–10 l/min • e-flomo temperature control system: 4 and 6 circuits • Remote service: e-connect.24 (2 years) Gkedoz I Nixopfx Akyjc Additional equipment • Robot: ENGEL viper 12 RC300 • Max payload: 12 kg • Strokes: Z 1,160 mm; X 600 mm; Y 900 mm • C axis: pneumatic 0–90°, 30 Nm • Max system height: 3,600 mm • Min deposit height: 1,000 mm • Integrated conveyor belt • Belt width: 350 mm • Belt temperature resistance: up to 300 °C • Temperature control unit: HB-Therm Thermo-5 HB-160Z1 • Max temperature: 160 °C • Heating power: 8.0 kW • Pump: 0.50 kW, 30 L/min, 52 m • Cooling capacity: 30 kW @ 60 K • Vacuum pump: Pfeiffer DUO 35, 32 m³/h • Induction heating system: 50 kW, 50–200 kHz • Melting chamber: max ingot weight 100 gNo plastic extruder included!

Condition: good (used), axle configuration: 3 axles, permissible axle load (axle 1): 9,000 kg, permissible axle load (axle 2): 9,000 kg, permissible axle load (axle 3): 9,000 kg, first registration: 11/2015, total length: 13,710 mm, total width: 2,470 mm, total height: 1,630 mm, suspension: air, tire size: 385/55-R22.5, color: black, Year of construction: 2015, Equipment: ABS, = Additional Options and Accessories = - ADR - EBS - Lift axle - Air suspension - Disc brakes = Notes = 11/2015 D-TEC FLEXITRAILER TRACTION with ABS/EBS, SAF axles with disc brakes, lift axle on the 1st axle, adjustable twistlock front arm for optimal axle load and traction with heavy 20-foot tank containers, extendable in the center and at the rear, suitable for all containers, ADR (EX/II, EX/III) valid until 01/16/2027, unladen weight: 4,575 kg, permissible gross weight: 43,000 kg, tires 385/55-R22.5 (tread depth left: 14/9/3 mm; tread depth right: 14/9/4 mm), German registration with valid main inspection until 01/16/2027. = Further Information = Axle configuration Tire size: 385/55-R22.5 Axle brand: SAF DISC Brakes: Disc brakes Suspension: Air suspension Rear axle 1: Lift axle; Max. axle load: 9000 kg; Tire tread depth left: 90%; Tire tread depth right: 90% Rear axle 2: Max. axle load: 9000 kg; Tire tread depth left: 55%; Tire tread depth right: 55% Rear axle 3: Max. axle load: 9000 kg; Tire tread depth left: 20%; Tire tread depth right: 25% Weights Unladen weight: 4,574 kg Payload: 38,425 kg GVWR: 43,000 kg Gkodpfjz R Rinox Akyoc Functional Body brand: D-TEC FLEXITRAILER TRACTION Maintenance, History, and Condition APK (Technical Inspection): Valid until 01/2027 Technical condition: very good Optical condition: good Identification Registration number: OHAIY758 Additional Information Please contact Arne Honingh for further information.

Condition: used, mileage: 490,000 km, power: 350 kW (475.87 HP), first registration: 07/2007, fuel type: diesel, overall weight: 26,000 kg, emission class: euro5, Equipment: ABS, air conditioning, all wheel drive, Actros 3348 Registration: km GERMAN TRUCK 6x6 - ALL-WHEEL DRIVE FULL STEEL EPS - 3 Pedal 480hp - V6 Engine Air Conditioning Gsdpfoz R H Rysx Akyjkc Meiller Dump Truck Price without dump body/only chassis - 3000 EUR Delivery to Port: Hamburg/Antwerp/Rotterdam/Bremerhaven... 1000 EUR ----Visit our website: German/English/Serbian/Croatian/Bosnian/Bulgarian... Goran German/English/...?...?... Roman We will gladly take care of your financing or leasing. EU Sales: net price upon presentation of company documents and VAT number. VAT deposit: 2000 EUR Our services for you: - Customs license plates - Export documents and EUR1 - Worldwide transport - Accommodation options - Transfer from Munich Airport or Passau train station

Condition: used, mileage: 490,000 km, power: 350 kW (475.87 HP), first registration: 07/2007, fuel type: diesel, overall weight: 26,000 kg, emission class: euro5, Equipment: ABS, air conditioning, all wheel drive, Actros 3348 Registration: km GERMAN TRUCK 6x6 - ALL-WHEEL DRIVE FULL STEEL EPS - 3 Pedal Gsdpfxoz R H Rtj Akyekc 480hp - V6 Engine Air Conditioning Meiller Tipper Price without tipper/only chassis - €3000 Delivery to Port: Hamburg/Antwerp/Rotterdam/Bremerhaven... €1000 ----Visit our website: German/English/Serbian/Croatian/Bosnian/Bulgarian... Goran German/English/...?/... ... Roman We will be happy to assist you with financing or leasing. EU Sale: net price upon presentation of company documents and tax/VAT number. VAT deposit: €2000 Our services for you: - Customs license plates - Export documents and EUR1 certificate - Worldwide transport - Accommodation options - Transfer from Munich Airport or Passau train station.

Year of construction: 2008, condition: excellent (used), Miter Saw - Cutting Center STROMAB model CT 800 Year 2008 Gkedpskzhffjfx Akyec

Condition: good (used), axle configuration: 3 axles, permissible axle load (axle 1): 9,000 kg, permissible axle load (axle 2): 9,000 kg, permissible axle load (axle 3): 9,000 kg, first registration: 01/2017, total length: 13,710 mm, total width: 2,470 mm, total height: 1,630 mm, suspension: air, tire size: 385/55-R22.5, color: black, Year of construction: 2017, Equipment: ABS, = Additional Options and Accessories = - ADR - EBS - Lift axle - Air suspension - Disc brakes = Notes = 2017 D-TEC FlexiTrailer Traction with ABS/EBS, SAF axles with disc brakes, lift axle on the 1st axle, adjustable twistlock front arm for optimal axle load and traction with heavy 20-foot tank containers, extendable in the middle and at the rear, suitable for all containers, ADR (EX/II, EX/III, FL, AT), unladen weight: 4,881 kg, permissible total weight: 43,000 kg, tires 385/55-R22.5 (tread depth left: 5/9/5 mm; tread depth right: 7/9/3 mm), German registration. = Additional Information = Axle configuration Tire size: 385/55-R22.5 Axle brand: SAF DISC Brakes: Disc brakes Suspension: Air suspension Rear axle 1: Lift axle; Max. axle load: 9000 kg; Tire tread depth left: 30%; Tire tread depth right: 45% Rear axle 2: Max. axle load: 9000 kg; Tire tread depth left: 55%; Tire tread depth right: 55% Rear axle 3: Max. axle load: 9000 kg; Tire tread depth left: 30%; Tire tread depth right: 20% Weights Unladen weight: 4,881 kg Gsdpfoz R Sxwox Akyjkc Payload: 38,119 kg GVWR: 43,000 kg Functional Body brand: D-TEC FLEXITRAILER TRACTION Condition Technical condition: good Optical condition: good Identification License plate: OHAJX772 Additional information Please contact Arne Honingh for further information.

Condition: good (used), axle configuration: 3 axles, permissible axle load (axle 1): 9,000 kg, permissible axle load (axle 2): 9,000 kg, permissible axle load (axle 3): 9,000 kg, first registration: 01/2016, total length: 13,710 mm, total width: 2,470 mm, total height: 1,630 mm, suspension: air, tire size: 385/55-R22.5, color: black, Year of construction: 2016, Equipment: ABS, = Additional options and accessories = Gedpfx Asz R Rlcokyskc - ADR - EBS - Lift axle - Air suspension - Disc brakes = Notes = 2016 D-TEC FLEXITRAILER TRACTION with ABS/EBS, SAF axles with disc brakes, lift axle on the 1st axle, adjustable twistlock front arm for optimal axle load and traction with heavy 20-foot tank containers, extendable in the middle and at the rear, suitable for all containers, ADR (EX/II, EX/III, FL, AT), unladen weight: 4,575 kg, permissible total weight: 43,000 kg, tires 385/55-R22.5 (tread depth left: 4/12/11 mm; tread depth right: 8/14/12 mm), German registration. = Further information = Axle configuration Tire size: 385/55-R22.5 Axle brand: SAF DISC Brakes: Disc brakes Suspension: Air suspension Rear axle 1: Lift axle; Max. axle load: 9,000 kg; Tire tread depth left: 25%; Tire tread depth right: 50% Rear axle 2: Max. axle load: 9,000 kg; Tire tread depth left: 75%; Tire tread depth right: 90% Rear axle 3: Max. axle load: 9,000 kg; Tire tread depth left: 70%; Tire tread depth right: 75% Weights Unladen weight: 4,575 kg Payload: 38,425 kg GVW: 43,000 kg Functional Body brand: D-TEC FLEXITRAILER TRACTION Condition Technical condition: very good Optical condition: good Identification License plate: OHAJY266 Further information Please contact Arne Honingh for further information.

Condition: used, mileage: 536,000 km, power: 370 kW (503.06 HP), first registration: 05/2004, fuel type: diesel, overall weight: 18,000 kg, brakes: retarder, gearing type: semi-automatic, emission class: euro3, Equipment: soot filter, - Retarder - Air conditioning Gedsz R Iapopfx Akyokc - Leaf spring suspension - Trailer - Optional: Fassi 150 crane with 3 extensions Suspension: Leaf spring suspension

Condition: used, mileage: 304,000 km, power: 320 kW (435.08 HP), first registration: 04/2008, fuel type: diesel, overall weight: 26,000 kg, brakes: retarder, gearing type: semi-automatic, emission class: euro5, Equipment: soot filter, - Retarder - Air conditioning - Leaf spring suspension - 3-way tipper Gsdpfsz R H Ulsx Akyokc - Trösch suspension: Leaf spring suspension