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Best Choice Lokkr 
Lokkr 5PCS Flexible Couplings 5mm to 8mm Set, Aluminum Connector Flexible Coupler for 3D Printer CNC Machine, DIY Encode ➤High Quality Material: Made of high-quality Aluminum Alloy, Surface oxidation treatment, durable, fine workmanship andLokkr Lokkr 5PCS Flexible Couplings 5mm to 8mm Set, Aluminum Connector Flexible Coupler for 3D Printer CNC Machine, DIY Encode ➤High Quality Material: Made of high-quality Aluminum Alloy, Surface oxidation treatment, durable, fine workmanship andVGOL 
VGOL 2PCS 5mm to 8mm Shaft Couplers Aluminum Alloy Casing Rigid Coupling Compatible with Ender 3 V2 Ender 3 PRO Ender 3 Package includes 2pcs 5mm to 8mm shaft couplers.Best Value tooloflife 
ToolOfLife 4/5/6.35/8/10/12/14mm Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector ✔Flange coupling is made of 45# steel, heat and electroplated process make it sturdiness and insulation.TopHomer 
10 Pcs Quick Coupling Release Set 1/4" BSP Air Line Euro Hose Fittings Female Male Air Connections Hose Compressor Fitti 10 Pcs Quick Coupling Release Set 1/4 Bsp Air Line Euro Hose Fittings Female Male Air Connections Hose Compressor FittinCreate idea 
Create idea 18mm Square Brass Coupling Square Brass Coupler 3D Printer Coupling Parts T8 Z Axis Coupling Compatible with [Enhanced Compatibility] Compatible with Creality CR10/CR-10S Pro/Ender-3/S/Pro/V2 3D Printer, offering a precise fit foOpusBags 
2 Pack PVC Pipe Fitting Straight Coupling Adapter, Socket Pipe Fittings Connector for Water Supplies Build Outdoor Garde LINK FUNCTION — Effectively connecting and sealing pipelines to prevent leakage and ensure smooth fluid flow is a reliabWalquicks 10 Pcs Double Male Connectors, Plastic Hose Connector 1/2 Inch Quick Connector Snap Fit Extender for xtension for Garden 【Hose connection】Double garden hose connector, compatible connector for hose lines with a diameter of 1/2 inch; 1/2 inchLEDON LEDON 50MM 2000KG Trailer Hitch 2 Hole Quick Release Coupling Black Quick Release Coupling for RV, Boat, Camper Fits 50m 2000kg Heavy-Duty Capacity – Rated for towing RVs, boats, and campers up to 2 tonnes (4400 lbs) with confidence.SING F LTD SING F LTD 1Set Pump Coupling Replacement P06574 Air Coupler Compatible with Bestway Compatible with Lay-Z-Spa AirJet Ho Compatibility: This product is Compatible with Lay-Z-Spa Aruba AirJet, Compatible with Bali AirJet, Compatible with BajaFIENSYDL 2 PCS 56315-2K000FFF Flexible Steering Coupler Replacement, Automotive Power Steering Coupler, Plastic Steering Coupling OE-Grade Polyurethane Composite Lightweight yet durable plastic blend with 30% fiberglass reinforcement for 100,000+ mil17% Off Cryfokt Threaded Rod Connector, 25mm Length, 20Pcs 304 Stainless Steel M5x0.8 Hex Coupling Nut Corrosion for Replacement 20 Pcs Set: Pack includes 20 pcs hex rod coupling nuts, enough quantity for using, ideal for replacing old worn or damagHilitchi Hilitchi 28Pcs M8 Round Connector Nuts 304 Stainless Steel Round Coupling Nuts 8mm 15mm 20mm 25mm 30mm Sleeve Rod Coupli 🔨【What You Will Get】You will receive 8pcs M8 x 8mm round connector nuts, 8pcs M8 x 15mm round connector nuts, 4pcs M8 xSG Store SG Store 4Pcs Flange Coupling Connector 5mm with Screws and M3 Hex Wrench for DIY Handmade Model RC Model Motors Hole Di Inner Diameter:5mm, Cylinder Outer Diameter:10mm, Cylinder Height:10mm, Base Height:2mm,Total Height:12mm, Mounting HoleATNSINC ATNSINC 5PCS Flexible Coupling 5mm to 8mm Compatible with NEMA 17 Stepper Motors for 3D Printer or Small CNC Machine wit Made of high quality Aluminum Alloy with Oxidation treatment. High durability and stability.47% Off G-Sunny Dishwasher,Washer Snap Coupling Adapter,Shower Hose, Garden Hose(3/4GHT) Quick Connection, for Bathroom/Kitchen,Sink to [All brass] The quick installation kit includes a snap buckle and a male with a 360° rotation. They are all made of brasGeneric Black Drive Shaft Tree Pin Coupling KW716904 Compatible with Kenwood Food Processor Compatible With Models: FDM300 FDM301 FDM302 FDM303 FDM304 FDM307 FDM310 FDM312 FDM313 FDM315 FDM316 FDP300 FDP301 FDP304Cabling 4C | Plain Coupling Orange 32mm - 20 Pack 4C | Plain Coupling Orange 32mm - 20 PackMingzhe M6x1 L30mm 10 Pcs Hex Coupling Nut 304 Stainless Steel Anti Threaded Rod Connector [Indoor & Outdoor Use] Ideal for replacing old or damaged nuts, these coupling nuts are suitable for a wide range of appCHANCS CHANCS Motor Shaft Rigid Sleeve Coupling 6mm to 8mm Bore Rigid Coupling Set Screw Motor Accessories for DIY Parts 2PCS Motor Shaft Rigid Brass Sleeve Coupling offer high torque, stiffness, low inertia and excellent sensitivity. Hexagonal CAreyourshop Areyourshop High Pressure Hydraulic Quick Coupler Couplings Set NPT 3/8" 10,000 PSI Our couplers are machined out of carbon steel, which offers corrosion resistance, as well as an extra layer against normeMagTech eMagTech 4Pcs 8mm to 8mm Metal Shaft Coupling Universal Joint Shaft Coupling Flexible Coupling Connector Accessories for Package : You will get 4x 8mm to 8mm metal shaft coupling, 16x screw, 1x wrench.SagaSave SagaSave 25mm High Pressure Storz Coupling, Fire Hose Tail Nozzle, Replacement Fire Engine Storz-Coupling Package Content: You will receive a storz coupling with long connection piece. Please check the measurement to ensure fiGeneric 10 Pcs 20mm Coupling, White PVC Conduit Connector, 65mm Length,Compatible with NBN P20 Conduits DIMENSIONS: 65mm length coupling designed for 20mm conduits, providing extended connection length for secure joiningCHANCS CHACNS Power Tool Parts Outer Diameter 10mm Inner Diameter 5mm Flange Coupling Connector 2PCS High Hardness Metal Rigid *Flange coupling is a special coupling that can fix a shaft to a flat surface and easily install other accessories on thLuomorgo Luomorgo 3/4" PVC Union Pipe Fitting, 6 Pcs Socket x Socket White PVC Adapter Coupling Schedule 40, EPDM O-Ring Package included: 6 x 3/4 inch pvc union, 1.05"/26.7mm inside diameter x 1.26"/32.1mm outside diameter, 1.8"/46mm heightPlasson Metric Poly Slip/Repair Coupling 32mm 69528 Water Irrigation Plasson FOR USE WITH METRIC MAINS PRESSURE POLY PIPEaikoolwer aikoolwer Compressed Air Distributor Coupling 2-Way 1/4 Inch Brass Air Hose Quick with Male Thread Nipple Dual Outlet Distribution:Two-way compressed air distribution allows simultaneous operation of multiple pneumatic tools fuxcell uxcell M6 x 1.0-Pitch 30mm Length 304 Stainless Steel Metric Hex Coupling Nut, 5-Pack Thread Size: M6 x 30mm; Pitch: 1.0mm；Length: 30mm/1.18"uxcell uxcell M6 x 1.0-Pitch 30mm Length 304 Stainless Steel Metric Hex Coupling Nut, 5-Pack Thread Size: M6 x 30mm; Pitch: 1.0mm；Length: 30mm/1.18"Superior Trailer Parts Superior Trailer Coupling Hitch Lock Part Tow Ball Caravan Anti Theft Tool Kit Application: The Ball Lock is an anti-theft locking device that expands & locks inside the coupling of your trailer prevBQLZR BQLZR Blue 6mm to 6mm Aluminum Shaft Coupling Rigid Coupling Coupler Motor Connector with Spanner Pack of 2 Scope of application: widely used in blowers, 3D printers, DIY robots, CNC machine tools, stepper motors, etc.uxcell uxcell 8mm to 8mm Aluminum Alloy Shaft Coupling Flexible Coupler L25xD20 Golden Tone Material: Aluminum alloy; Connection Diameter: 8mm to 8mm; Total Length: 25mm /0.98 inch; Outside Diameter : 20mm/ 0.78Supply Giant Supply Giant 6I49 Flexible PVC Coupling with Stainless Steel Clamps, 4", Black ATTENTION: Please verify that the outside diameter of the Schedule 40 pipe is small enough to fit correctly within the iCryfokt Cryfokt AC Hose Coupling Universal 5.9 Inches (150MM) AC A/C Exhaust Vent Hose Connector Coupling Lightweight Air Condit 【Applicable】This coupler connector is generally used for 150mm diameter air conditioning exhaust ducts, as long as the sRuimou Aluminum Flexible Coupling D40xL55,16mm to 20mm Spider Coupler Plum Shape for Servo Stepper Motors, CNC Machine, 3D Prin 1.Coupler made of aircraft aluminium, red part made of polyurethane; plum clamp series; consists of 3 parts: two metal hAcbbMNS AcbbMNS 10pcs M6 Hex Rod Coupling Nuts Round Connector Nuts Zinc Plated, 10mm OD, 20mm Length Package Content: 10pcs M6 round coupling nuts, outer diameter 10mm/0.39inch, length 20mm/0.79inch.uxcell uxcell M4 x 0.7-Pitch 12mm Length 304 Stainless Steel Metric Hex Coupling Nut, 10-Pack Thread Size: M4 x 12mm; Pitch: 0.7mm；Length: 12mm/0.47"uxcell uxcell 6pcs 2mm to 2mm Brass Shaft Coupling Joint Connector with Screws and Hex Wrench Flexible Motor Shaft Coupler for The Brass Shaft Coupler Coupling Connector Is made of pure brass, sturdy, reliable and strictly functional. Used for conuxcell uxcell Shaft Coupling 12mm to 14mm Bore L55xD40 Flexible Coupler Joint for Servo Stepped Motor General purpose power transmission coupling, also used in motion control applications and rotational power transmissionsFANOVO Brass Pipe Fitting-1/2 NPT Female×1/2" NPT Female Pipe Coupling-Chrome Plated Shower Head Coupling-Converter Adapter, fo Chrome Pipe Fitting : Our 1/2 NPT pipe converter adapter is processed by the surface chrome plating process. The chromeEnhon Enhon 2 Pcs Water Filter Coupling Kit, Compatible with 28mm External Threaded Water Filters and Standard Plastic Bottles Perfect Compatibility: Our water filter coupling has an inner diameter of 28mm on both ends, which is compatible with 28AcbbMNS AcbbMNS 10pcs M10 Hex Rod Coupling Nuts Round Connector Nuts Zinc Plated, 14mm OD, 33mm Length Package Content: 10pcs M6 round coupling nuts, outer diameter 14mm/0.55inch, length 33mm/1.3inch.DNP srl Set of Hydraulic Quick Release Coupling 1/2" BSP Tractor Loader Male & Female Couplers ISO A 1/2" BSP Coupling Set (Male & FemaleAuto-plaza 20pcs Drip Irrigation Coupling, Blue Connector Farm Irrigation Tools, Universal Joint Drip Irrigation Tube Fitting Set ( Made of high-quality plastic, durable, pressure resistant and leak proof.Seentech Seentech Heavy Duty 285753A METAL Core Motor Coupling Kit for Whirlpool & Kenmore Washers - Replaces Part Numbers: AP396 MODEL NUMBER: 285753A Metal Motor Coupling Kit. Replaces part numbers: AP3963893, 1195967, 280152, 285140, 285743, 28575QccHieUs QccHieUs 1-7/8" Ball Trailer Coupling Cap Accessory RV Parts Straight Trailer Coupler for Yacht Trailers Utility Spare P 【Specification】: This specification is suitable for 1-7/8 inch ball heads, suitable for installation on vehicle towing eMardatt Mardatt 2Pcs Hammerlock Coupling Link Heavy Duty Alloy Steel Connecting Link Hammerlock Mechanical Coupling Link Safety ♜【What You Will Get】You will receive 2pcs 1.12T G80 alloy steel connecting link, and it measures 2.36”/60mm in total lenMark Vitow Close Coupling Kit for WC Toilet Pan Cistern Doughnut Fixings Plate Donut Close Coupling Kit for WC Toilet Pan Cistern Doughnut Fixings Plate Donut27% Off uxcell uxcell 10mm Inner Dia H13*D16 Rigid Flange Coupling Motor Guide Shaft Coupler Motor Connector Silver Tone 2 PCS for DIY Inner Diameter: 10mm/0.39 inch, Total Height: 13mm/0.51 inch, Cylinder Outer Diameter: 16mm/0.63 inch, Cylinder Height:Akeady 1pc 3 Jaws Coupler, 8 9 10 11 12 14 16 18 20 22mm Aluminium Flexible Plum Coupling, D40L50 Aluminum Plum Shaft Coupling( Includes 1pc of 3 Jaws Coupler and 2pcs of M5 screws.Flomore 6mm to 8mm Flexible Shaft Coupling 25mm Length Aluminium Alloy Flexible Coupling for 3D Printer and CNC Machine Pack of Material:7075 Aluminium alloy(This kind of Aluminium alloy is of better strength.It's perfect material for CNC processinBUBUCAM 2PCS RJ45 Coupler, Female to Female Network LAN Adapter Coupler Shielded Enclosure Ethernet Network Extender Connectors Probably the fastest and easiest way to connect two network cables. to extend an Ethernet cable. An inexpensive way to uuxcell uxcell M8 Round Connector Nuts, 304 Stainless Steel Coupling Nut 15mm/0.59inch Length,Pack of 5 100% Brand new and .PT Squared Trading Co. The Original Hydraulic Quick Coupling Pressure Decompression Relief Release Tool 1/2" Ag/Pioneer/Poppet Size fits Models The Original Tractor Relief Tool! PLEASE VERIFY YOUR COUPLING SIZE AND STYLE BEFORE ORDERING! Relieves pressure in hydraCLLOMAGY CAC104 Big Stix Immersion Blender Coupler Replacement Kit for Waring,503357 Coupling Kit for Big Stix Immersion Blender Fitment: Replaces part number#CAC104 503357, direct immersion blender coupler replacement for Warning immersion blenderLAS LAS 10641 Square Coupling Claw Trailer 750 kg 60 mm For trailers with square drawbarMuromoto Merry Tools Muromoto Tekko Merry HS175C Coupling Tool Total Length: 7.5 inches (190 mm)YDuupxe YDuupxe 10pcs 1:1 600 : 600 Ohm EI14 Audio Coupling Isolation Transformer for Transform Voltage Load Impedance ✔【10pcs】10x EI14 Audio , large quantity, easy to use.Superior Trailer Parts Superior Poly Block Override Coupling Hitch - 2T Rating ADR62/02 Trailer Precision Casting, great qualityMEDLOCK Medlock Magnetic Easy Break Hose Coupling Kit for Sleep Mask MedLock refines our technology used in motorsports to create a smooth and easy connection between you and your sleep theMuromoto Muromoto Ironwork Merry Coupling Tool Jr HS120C Coupling ToolsJiawu Jiawu Lightweight Plum Blossom Coupling Encoder for Stepper Motor, Small Radial Size Plum Coupler for Medium Speed Equip [STABLE & RELIABLE] Ensure stable and reliable performance with good shock absorption and cushioning properties with thiLSQ LSQ-FF-03 3/8" NPT 3/8'' Body Flat Face Hydraulic Quick Connect Disconnect Coupler Set Hydraulic Quick Couplings w/Dust ISO16028 Standard, New valve design, it can resistance damage from high flow and the pressure of impulse that providingNAMOARLY NAMOARLY 20PCS Printer Tube Clips with Anti-Slip Claw Grip Quick Release Couplings for Tubes Stable Pneumatic Fittings f Wide range of use: suitable for various 3d printing applications, meeting the needs of both casual users and industry priplusmile iplusmile Flexible Stainless Steel Shaft Couplings Stepper Motor Coupler Connector for Printer Accessories Stress-Relief Shaft coupler connector--flexibility of coupling shaft removes stress between the motor and driving components,stepper muxcell uxcell 11/64" (4.2mm) ID Copper Tube Flare Fitting with Nuts, 2 Pcs Straight Copper Coupling Welding Joint Pipe Fitting Specification: Color: Gold Tone; Material: Copper, Brass; Pipe Fittings Dia: 4.2 x 6.35mm / 11/64 x 1/4inch (ID*OD); SuiGARDENA Gardena Coupling with Flow-Control Valve: Hose Coupling for continuously regulating and shutting Off The Water Flow in T Efficient irrigation: The water flow can be continuously regulated and shut off along the hose route, which means that iVictorinox Victorinox 4.1835 V41835 Nickelplated Coupling, Silver, 25 mm Size: Ø 25 mmVictorinox Victorinox 4.1835 V41835 Nickelplated Coupling, Silver, 25 mm Size: Ø 25 mmJINdanju JINdanju 20Pcs Bowden Tube Coupling Clip Bowden Collet and Clip Set 3D Printer Accessories 1.75mm Filament Printer Parts Versatile Compatibility: Perfectly suited for 1.75mm filament, these couplings are designed to fit a wide range of 3D prakkacm 1-Pack Ender 3 Oldham Coupling Coupler for Upgrade Ender 3 Pro V2 CR-10 CR-10S Pro 3D S4 S5 Printer Z Axis T8 Lead Screw 【High Quality】The Oldham Coupling is made of brass for reduced friction and sufficient strength,produced by a CNC machinLT Easiyl LT Easiyl 10 Sets Tube Coupling Collet Clamp Clip Kit for 3D Printer Extruder Hotend Accessories Compatible with Ultimak The locking clips are made of safe and non-toxic material, tetrafluoroethylene and the snap ring are made of 304 stainleBaluue Baluue 2 Sets Collet Clip Tube Coupling Printer Extruder Hotend Clamp for Printer Accessory Hotend extruder collet: produced by a good craftsmanship and has a strong structure, can use it with peace of mind.YYLQUN 5/10/20pcs Quick Connector Bore 4mm Compatible with OD 4mm PTFE Tube Coupling Collet 1.75MM Extruder UM2 Red Lizard Voro Seamless Connectivity: Effortlessly connect your devices to our fast-connect 3D printer compatible with a seamless printJiawu Jiawu Flexible Plum Shaft Coupling for CNC Stepper Motor Encoder, Reliable Industrial Coupler for Servo Motors, Aluminum [STABLE PERFORMANCE] The Plum Shaft Coupling delivers consistent and reliable performance, providing optimal shock absorASHATA G1/4 Fitting Adapter, Richer-R 2pcs Coupling Adapter G 1/4 Fitting Extender for Water Cooling System Adopt of raw materials and professional environmental coatingPXZBLG 1/2" Poly PPSU Barb Crimp PEX Fitting, 25pcs PEX Straight Coupling Fittings, No Lead 【Worthy Pack】- Poly PPSU barb crimp PEX fittings include 25pcs 1/2" PEX straight fittings, which can be used in potableSluffs 5Pcs Bore Rigid Coupling Set 5mm to 8mm Shaft Coupler Connector Stainless Steel Coupler Rigid Couplings for 3D Printers Steel Material: Made of premium steel material, this bore coupling is strong and sturdy, corrosion resistant and possessLonlonty Lonlonty 2 x RJ45 Coupling Outdoor IP68 Waterproof, Cat7 LAN Connector Shielded, Toolless, Ethernet Cable Extension for High-quality connection: Cat7 standard performance up to 10Gbps 600 MHz, 2.4 times higher than Cat6, stronger shielding,Orbit Orbit Tap Gooseneck Coupling Durable, rust-proof brass constructionKaifucy Kaifucy 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D Flexibility of coupling shaft removes stress between the motor and driving components.JINdanju JINdanju 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the deKaifucy Kaifucy 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector for 3D 6mm to 8mm shaft usage diameter, 25mm length, 18mm diameter, set screw type, beam coupling.Zero backlash. One-piece metaReland Sun 10PCS/LOT RPR220 Optoelectronic Switch Reflective Optical Coupling Sensor Reland SunUtopially Utopially 2X 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Joint Connector for 3D Printer CN 6mm to 8mm shaft usage diameter, 25mm length, 18mm diameter, set screw type, beam coupling.Zero backlash. One-piece metaUtopially Utopially 5pcs 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector 6mm to 8mm shaft usage diameter, 25mm length, 18mm diameter, set screw type, beam coupling.Zero backlash. One-piece metaTenKeAuto 10 Pack TenKe PEX A F1960 Poly Expansion Fitting 3/4" X 1/2" Reducing Coupling Pex A Cold Expansion for Plumbing Corrosi PEX A expansion Fitting Are Made of high-quality PPSU material, PPSU is more eco-friendly than brass, Compatible with alUtopially Utopially 6pcs 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector 6mm to 8mm shaft usage diameter, 25mm length, 18mm diameter, set screw type, beam coupling.Zero backlash. One-piece metaUtopially Utopially 6pcs 6mm to 8mm Shaft Coupling 25mm Length 18mm Diameter Stepper Motor Coupler Aluminum Alloy Joint Connector 6mm to 8mm shaft usage diameter, 25mm length, 18mm diameter, set screw type, beam coupling.Zero backlash. One-piece metaGeneric Generic Set of Coupling Removable, Red+Blue 1, as described With three rings apart keychain keys for , vehicles, office,TenKeAuto 15 Pack TenKe PEX A F1960 Poly Expansion Fitting 3/4" X 1/2" Reducing Coupling Pex A Cold Expansion for Plumbing Corrosi PEX A expansion Fitting Are Made of high-quality PPSU material, PPSU is more eco-friendly than brass, Compatible with alGYZOUKA GYZOUKA Flexible Aluminum CNC Stepper Motor Coupling D19 L25 Shaft Coupler Easy to Install Buffer Damping [Wide Usage] Widely used in small cnc machine tools, this coupling simplifies the debugging process and ensures smoothHubbell Raco Hubbell-Raco 2924RT EMT Compression Coupling, Raintight, 1-Inch Trade Size, Steel (Pack of 15) Steel construction ensures mechanical protectionTenKeAuto TenKeAuto 25 Pack 3/4 inch Pex A F1960 Poly Expansion Fittings 3/4" Coupling Pex A Cold Expansion, Corrosion Resistant, PEX A expansion Fitting Are Made of high-quality PPSU material, PPSU is more eco-friendly than brass, Compatible with aldeleyCON deleyCON CAT 7 Coupling Keystone Metal 2X RJ45 Socket Connector for RJ45 Patch Cable 600 MHz 10 Gbps LAN DSL Ethernet an Limitless: Existing RJ45 patch cable network connections as desired extend and extendTenKeAuto 10 Pack TenKe PEX A F1960 Poly Expansion Fitting 1" Coupling Pex A Cold Expansion for Plumbing Corrosion Resistant (10pc PEX A expansion Fitting Are Made of high-quality PPSU material, PPSU is more eco-friendly than brass, Compatible with alTenKeAuto 15 Pack TenKe PEX A F1960 Poly Expansion Fitting 3/4" Coupling Pex A Cold Expansion for Plumbing Corrosion Resistant (15 PEX A expansion Fitting Are Made of high-quality PPSU material, PPSU is more eco-friendly than brass, Compatible with alHaofy Haofy Durable Coupling Couplings for VZBOT BLV T8 Z -Sachs 3D Printers, Accuracy Processed with Universal Compatibility [Improved print quality] eliminates problems with the heat betting and reduces the influence of the screw rod -clearance