Screw Lead
2008
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 Leadscrew Lead Screw for mini Hobby robot Machine $9.99 Time Remaining: 28d 2h 46m Buy It Now for only: $9.99 |
 C90402 Manual Lead Screw Leadscrew Linear Positioning Stage $32.00 (2 Bids) Time Remaining: 1d 12h 18m |
 THK Linear Ball Screw Actuator KR33 10mm Lead 110mm Travel $149.99 Time Remaining: 16d 3h 12m Buy It Now for only: $149.99 |
 4 NB Linear Rail NB SEBS15A Block 5mm Flex Coupler 4 Lead Screw $29.99 Time Remaining: 16d 16h 55m Buy It Now for only: $29.99 |
 Small Buehler 12V DC Gear Motor W 9 Lead screw 3 1 8 travel 9 1 4 overall $25.00 Time Remaining: 16d 23h 58m Buy It Now for only: $25.00 |
 1 2 10 X 36 ACME LEAD SCREW 1 2983 50 3 $9.35 Time Remaining: 28d 7h 19m Buy It Now for only: $9.35 |
 Rexroth Ball Screw 1975 Thread Length 5 8 lead $90.00 Time Remaining: 4d 16h 13m Buy It Now for only: $90.00 |
 NSK W2502WF 30PS1 Ball Screw Fast lead $75.00 Time Remaining: 26d 10h 2m Buy It Now for only: $75.00 |
 Kuroda Ball Screw CNC Axis 4mm lead Pitch Precision $65.00 Time Remaining: 11d 6h 50m Buy It Now for only: $65.00 |
 LEAD SCREW PRECISION 12 LONG 1 2 DIA 10 TURNS INCH $10.00 Time Remaining: 12d 3h 56m Buy It Now for only: $10.00 |
 3 4 6 X 36 ACME LEAD SCREW 1 2983 75 3 $16.95 Time Remaining: 28d 7h 19m Buy It Now for only: $16.95 |
 Universal Lead screw Leadscrews Lead Screws 205 cm for Hobby Machine $24.99 Time Remaining: 28d 20h 49m Buy It Now for only: $24.99 |
 Motion Lead Screw Actuator 90VDC 3000RPM PV26123W Bearing Nut $34.95 Time Remaining: 17d 7h 46m Buy It Now for only: $34.95 |
 HIWIN Precision Ground Screw New 5mm Lead NEW $485.00 Time Remaining: 16d 9h 30m Buy It Now for only: $485.00 |
 1x Universal Lead screw Leadscrews for mini Machine DIY $24.99 Time Remaining: 28d 18h 8m Buy It Now for only: $24.99 |
 Rexroth Ball Screw 16 thread length 5 8 lead R151206013 $80.00 Time Remaining: 4d 16h 10m Buy It Now for only: $80.00 |
 THK KX 6256B BALL SCREW 12 LONG MACHINE REPAIR LEAD SCREW ASSEMBLY $59.99 Time Remaining: 9d 4h 24m Buy It Now for only: $59.99 |
 1x Lead screws Leadscrew 21 in for CNC Router Axis $19.00 Time Remaining: 16d 20h 2m Buy It Now for only: $19.00 |
 1 x used Universal Lead screw Leadscrews Lead Screws 205 cm for Hobby CNC $24.99 Time Remaining: 8d 1h 18m Buy It Now for only: $24.99 |
 THK HIGH LEAD PRECISION ROLLED BALL SCREW P NBLK5050 NEW $450.00 Time Remaining: 17d 4h 14m Buy It Now for only: $450.00 |
 LEAD SCREW MOTION W NUT 99mm ANTI BACKLASH $28.00 Time Remaining: 10d 6h 30m Buy It Now for only: $28.00 |
 NEW KERK MOTION 85 LEADSCREW 8 1 2 LEAD SCREW $19.99 Time Remaining: 11h 42m Buy It Now for only: $19.99 |
 Telcon 1825 x 1115 Diameter Acme Lead Screw $24.95 Time Remaining: 1d 7h 53m Buy It Now for only: $24.95 |
 Square Ballnut with 36 Long 16mm Diameter Lead screw $155.00 Time Remaining: 17d 2h 24m Buy It Now for only: $155.00 |
 3 4 6 ACME LEAD SCREW HEX NUT 1 2984 75N $5.60 Time Remaining: 28d 7h 19m Buy It Now for only: $5.60 |
 1 2 10 ACME LEAD SCREW HEX NUT 1 2984 50N $3.45 Time Remaining: 28d 7h 19m Buy It Now for only: $3.45 |
 CNC Haydon KERK LEAD SCREW Dim 1 4 20 TPI 60cm +ZBX $33.00 Time Remaining: 23d 21h Buy It Now for only: $33.00 |
 1 1 4 5 ACME LEAD SCREW HEX NUT 1 2984 125N $11.95 Time Remaining: 28d 7h 19m Buy It Now for only: $11.95 |
 Universal Precision 1 4 Lead Screw Assembly 65 Travel 025 Lead 00005 Turn $54.95 Time Remaining: 18d 5h 58m Buy It Now for only: $54.95 |
 2 13 Lead Screws 074 Diameter Bearing Blocks $24.95 Time Remaining: 12d 9h 12m Buy It Now for only: $24.95 |
 NEW KERK MOTION 925 LEADSCREW 9 1 4 LEAD SCREW $19.99 Time Remaining: 11h 42m Buy It Now for only: $19.99 |
 THK Linear Ball Screw Actuator KR45 10mm Lead 110mm Travel $269.99 Time Remaining: 16d 3h 2m Buy It Now for only: $269.99 |
 LSI PRECISION GROUND ZERO BACKLASH BALL SCREW 500 LEAD 2000 THREAD DIA NEW $549.95 Time Remaining: 24d 12h Buy It Now for only: $549.95 |
 Lead Screw Motor Assembly 6VDC 120mA Positioner $29.99 Time Remaining: 21d 6h 14m Buy It Now for only: $29.99 |
 1 4 ACME LEAD SCREW HEX NUT 1 2984 100N $9.15 Time Remaining: 28d 7h 19m Buy It Now for only: $9.15 |
 Flanged Ballnut w 36 Long 20x5mm Diameter Lead screw $201.00 Time Remaining: 17d 2h 24m Buy It Now for only: $201.00 |
 1 4 X 36 ACME LEAD SCREW 1 2983 100 3 $27.95 Time Remaining: 28d 7h 19m Buy It Now for only: $27.95 |
 Kerk lead screw 3 8 dia 12 200 pitch Teflon coated $10.00 Time Remaining: 26d 16h 51m Buy It Now for only: $10.00 |
 CNC Haydon KERK LEAD SCREW + KHD 5 16 8mm 59cm 20 Tpi $39.00 Time Remaining: 24d 2h 4m Buy It Now for only: $39.00 |
 20 Linear Screw w Nut 3MM Lead 385MM Stroke 175 Dia $63.99 Time Remaining: 19d 10h 2m Buy It Now for only: $63.99 |
 CNC Haydon Switch Stepper Motor Rotary Linear Actuator Lead Screw+ NUT $85.00 Time Remaining: 14d 20h 50m Buy It Now for only: $85.00 |
 THK HIGH LEAD BALL SCREWP N BLK5050D DX 2I07 $795.00 Time Remaining: 13d 4h 35m Buy It Now for only: $795.00 |
 ZAE 15 3 4 x 0778 Diameter Lead Screw Reducer 4671 $24.95 Time Remaining: 23d 8h 57m Buy It Now for only: $24.95 |
 Flanged Ballnut with 36 Long 16mm Diameter Lead screw $145.00 Time Remaining: 17d 2h 24m Buy It Now for only: $145.00 |
 CNC Haydon KERK LEAD SCREW 605cm $30.00 Time Remaining: 9d 2h 59m Buy It Now for only: $30.00 |
 1 1 4 5 X 36 ACME LEAD SCREW 1 2983 125 3 $46.95 Time Remaining: 28d 7h 19m Buy It Now for only: $46.95 |
 315MM RH LEAD SCREW 22MM OUTSIDE DIAMETER WITH LEAD SCREW NUT MOUNTING PLATE $74.99 Time Remaining: 7d 9h 25m Buy It Now for only: $74.99 |
 CNC Haydon KERK LEAD SCREW Dim 3 16 5mm 20 TPI 60cm $33.00 Time Remaining: 24d 1h 48m Buy It Now for only: $33.00 |
 PRECISION GROUND BALL SCREW 5mm LEAD NEW $249.95 Time Remaining: 24d 6h 21m Buy It Now for only: $249.95 |
 Kerk lead screw 3 8 dia 25 100 pitch Teflon coated $30.00 Time Remaining: 6h 38m Buy It Now for only: $30.00 |
 Kerk Lead Screw x13x 200 pitch double start Teflon $20.00 Time Remaining: 19d 13h 24m Buy It Now for only: $20.00 |
 G90598 THK Ball Type Lead Screw w Pavalux Motor Copley 412 Servo Amp $99.99 Time Remaining: 6d 11h 43m |
 CNC Haydon Switch Instrument Stepper Motor Rotary Linear Actuator Lead Screw $85.00 Time Remaining: 12d 23h 7m Buy It Now for only: $85.00 |
 CNC Haydon KERK Lead Screw 5 16 8mm 20 Tpi 585cm + KHD NUT $40.00 Time Remaining: 14d 21h 30m Buy It Now for only: $40.00 |
 Shuton Precision Ground Ball Screw Linear Actuator 50mm 2690L 30mm Lead NSK THK $649.99 Time Remaining: 23d 17h 54m Buy It Now for only: $649.99 |
 Kerk Lead Screw x137 x 200 pitch double st Teflon $20.00 Time Remaining: 19d 13h 26m Buy It Now for only: $20.00 |
 LSI PRECISION GROUND ZERO BACKLASH BALL SCREW 250 LEAD 1500 THREAD DIA NEW $349.95 Time Remaining: 24d 6h 21m Buy It Now for only: $349.95 |
 Kerk Lead Screw x17 x 200 pitch double st Teflon $20.00 Time Remaining: 19d 13h 25m Buy It Now for only: $20.00 |
 Kerk lead screw 13x3 8x 200 w bearings Teflon coated $30.00 Time Remaining: 19d 13h 27m Buy It Now for only: $30.00 |
 KOYO PRECISION GROUND BALL SCREW 250 LEAD 1425 THREAD DIA OAL 27 5 8 NEW $349.95 Time Remaining: 11d 3h 9m Buy It Now for only: $349.95 |
 Parker 081 1558B Manual Lead Screw Table 4 Travel 25TPI 6 x 6 x 2 $150.00 Time Remaining: 13d 4h 51m Buy It Now for only: $150.00 |
 LEAD SCREWS INTERNATIONAL PRECISION GROUND BALLSCREW $359.95 Time Remaining: 28d 7h 9m Buy It Now for only: $359.95 |
 CNC Linear Rail + DC Step Motor Servo +2 NEW Limit Sensor 9 NO LEAD SCREW $350.00 Time Remaining: 4d 21h 27m Buy It Now for only: $350.00 |
 NEW OLD STOCK SPECIAL SHAFT 25 MM DIAMETER 495 MM LONG WITH LEAD SCREW TYPE NUT $34.99 Time Remaining: 7d 9h 28m Buy It Now for only: $34.99 |
 TSUBAKI HIGH LEAD BALL SCREWP N 517 1082 3 $689.95 Time Remaining: 24d 9h 49m Buy It Now for only: $689.95 |
 PRECISION GROUND ZERO BACKLASH BALL SCREW LEAD 10mm TRAVEL 15 1 4 NEW $289.95 Time Remaining: 29d 11h 40m Buy It Now for only: $289.95 |
 Lead Screws Intl B1122 Two Axis Ball Screw $189.95 Time Remaining: 28d 7h 22m Buy It Now for only: $189.95 |
 Precision Dovetail Linear Actuator Guide 15L 15mm Travel 1mm Lead Ball Screw $179.99 Time Remaining: 23d 18h 39m Buy It Now for only: $179.99 |
 TRANTEK HIGH LEAD BALL SCREW TRAVEL 60 1 2 4 LEAD $789.00 Time Remaining: 17d 4h 12m Buy It Now for only: $789.00 |
 Oriental Motor 2RK6GN AM Magnetic Brake Linear Head Lead Screw 2LF10N 3 Assembly $99.99 Time Remaining: 7d 12h 9m Buy It Now for only: $99.99 |
 CNC Haydon KERK LEAD SCREW Diam 7 16 11mm 10 TPI 92cm $55.00 Time Remaining: 22d 20h 29m Buy It Now for only: $55.00 |
 LSI PRECISION GROUND ZERO BACKLASH BALL SCREW 250 LEAD 1500 THREAD DIA NEW $369.95 Time Remaining: 24d 6h 21m Buy It Now for only: $369.95 |
 Parker 081 1558 Manual Lead Screw Table 4 Travel 25TPI 6 x 6 x 2 $150.00 Time Remaining: 13d 4h 36m Buy It Now for only: $150.00 |
 International Devices Corp Stepper Motor Lead Screw $79.99 Time Remaining: 26d 12h 8m Buy It Now for only: $79.99 |
 CNC Haydon Switch E43H43 05 026 Stepper Motor Linear Actuator Lead Screw $85.00 Time Remaining: 12d 23h 42m Buy It Now for only: $85.00 |
 4 new Universal Lead Screw and Nut Assembly 15 03 036 014 11B $111.99 Time Remaining: 16d 9h 41m Buy It Now for only: $111.99 |
 Kerk Lead Screw x19x 200 pitch double start Teflon $20.00 Time Remaining: 19d 13h 25m Buy It Now for only: $20.00 |
 CNC Haydon Switch K43H4C 233 109 Stepper Motor Linear Actuator Lead Screw $85.00 Time Remaining: 12d 23h 19m Buy It Now for only: $85.00 |
 NIB PARKER 803 5855A ACTUATOR BALL SCREW 2IN LEAD 1159898201A $750.00 Time Remaining: 7d 6h 19m Buy It Now for only: $750.00 |
 LSI PRECISION GROUND ZERO BACKLASH BALL SCREW 250 LEAD 1500 THREAD DIA NEW $349.95 Time Remaining: 24d 6h 21m Buy It Now for only: $349.95 |
 NEW PFAFF Lead Screw Lifting 26mm diameter 9450LR $110.00 Time Remaining: 12d 12h 17m Buy It Now for only: $110.00 |
 NEW PFAFF Lead Screw Lifting 26mm diameter 9451LR $110.00 Time Remaining: 12d 12h 18m Buy It Now for only: $110.00 |
 27 Lead Screw and Bearing G5 444 0024 $99.00 Time Remaining: 23d 5h 21m Buy It Now for only: $99.00 |
 Lead Screws International R 947 Ball Screw $2,250.50 Time Remaining: 15d 8h 12m Buy It Now for only: $2,250.50 |
 THK Ball Screw Nut BLK4040EZZ BLK 4040 EZZ LM SYSTEM Lead Rolled Ballscrew Block $250.00 Time Remaining: 10d 4h 5m Buy It Now for only: $250.00 |
 NEW LEAD SCREW LEFT HAND 30MM DIAMETER X1M LONG 3364005 $499.99 Time Remaining: 27d 5h 30m Buy It Now for only: $499.99 |
 NEW LEAD SCREW LEFT HAND 900MM LONG X 30MM DIAMETER $499.99 Time Remaining: 27d 5h 31m Buy It Now for only: $499.99 |
 NEW LEAD SCREW RIGHT HAND 1 METER LONG X 30MM DIAMETER $499.99 Time Remaining: 27d 5h 32m Buy It Now for only: $499.99 |
 NEW LEAD SCREW RIGHT HAND 900MM LONG X 30MM DIAMETER $499.99 Time Remaining: 27d 5h 32m Buy It Now for only: $499.99 |
 Parker 102002BNMP Lead Screw w Zeta4 240 Step Motor $524.99 Time Remaining: 1d 12h 33m Buy It Now for only: $524.99 |
 Giant 68 THK Precision Ball Screw CNC Router w bearing blocks 20MM 5 1 Lead $749.99 Time Remaining: 18d 20h 4m Buy It Now for only: $749.99 |
 LEAD SCREWS INTERNATIONAL INC ROLL THREAD Ball Screws $289.95 Time Remaining: 21d 8h 50m Buy It Now for only: $289.95 |
 Ball Lead Screw 59 CNC Router Mill Lathe Plasma Laser $139.00 Time Remaining: 15d 1h 14m Buy It Now for only: $139.00 |
 Universal Precision Lead Screw and Nut Assembly NIB $249.99 Time Remaining: 8d 10h 48m Buy It Now for only: $249.99 |
 Cincinnati Millacon Lead Screw And Misc Parts $600.00 Time Remaining: 10d 8h 9m Buy It Now for only: $600.00 |
 Ball Screw 26 CNC Router Mill Lathe Plasma Laser lead $174.09 Time Remaining: 24d 2h 54m Buy It Now for only: $174.09 |
 Ball Lead Screw 51 CNC Router Mill Lathe Plasma Laser $417.23 Time Remaining: 15d 25m Buy It Now for only: $417.23 |
 Ball Lead Screw 75 CNC Router Mill Lathe Plasma Laser $387.08 Time Remaining: 24d 3h 4m Buy It Now for only: $387.08 |
 Ball Lead Screw 63 CNC Router Mill Lathe Plasma Laser $339.43 Time Remaining: 24d 3h Buy It Now for only: $339.43 |
 Ball Lead Screw 14 CNC Router Mill Lathe Plasma Laser $212.99 Time Remaining: 5d 3h 8m Buy It Now for only: $212.99 |
Screw Lead
Single Screw Extruder With Long Wearing Surfaces
A method of extending the life of a single screw extruder by affixing tiles of wear-resistant material along the crest of the twin screw extruder flighting threads, and optionally grinding the hardened material to remove any sharp edges. In another configuration of the present sheet production extruder, plates of wear-resistant material are secured to the leading edges of the extruder screw threads to further prolong the life of the extruder screw.
Extrusion is a well-known process that is used in many industries. A variety of products from foods to optical fibers, plastics and metals are produced by extrusion. In the extrusion process, the materials to be extruded are fed into the extruder, a type of giant mixer. The materials are mixed, heated if appropriate, and fed into a barrel that contains an internal rotating screw. The screw moves the liquid or viscous material being extruded (the " extrudate"), out the end of the extruder.
It has been found that the outside edges of the screw threads in the extruder, which mix the extrudate and push it out the end of the extrusion barrel, tend to be more subject to wear than other parts of the screw threads. When the outside edges of the screw threads wear sufficiently, extrudate flows between the screw threads and the barrel, which interferes with the normal extrusion process. To this end, steps have been taken to extend the durability on those parts of the screws that see additional wear. Such steps have included applying a coating of various liquid substances that harden on the screw or applying an additional layer of solid wear-resistant material to the portions of the extruder screw subject to wear. However, it has been found that materials that project out from the surface of the screw are subject to shear during use, and the materials can experience fatigue cracks. Subsequently, pieces of the material can break off and end up being incorporated in the extrudate being mixed. Often this necessitates the disposal of batches of extrudate which are contaminated with pieces of wear-resistant material or coating.
Another solution has been to cut grooves in the crests of the extruder screw threads, and insert other materials, such as molybdenum, in those grooves, as shown in U.S. Pat. No. 5,135,378 to Catton ("Catton"). The Catton process is, however, very complex, involving cutting a groove, laying in a first material along the sides and at intervals as bridges across the width of the groove, then laying in a second material in a liquid state that hardens to form a mechanical bond with the extruder screw. The added material is then ground to form a smooth surface.
Another solution, as disclosed in U.S. Pat. No. 6,346,293 to Douris et al. ("Douris"), is to weld a bead of a hardened material along part of the width of the crest of the extruder screw threads, and then weld beads of a different hardened material along either side of the first bead of hardened material. Subsequently, the hardened materials are ground to the required tolerances.
Therefore, a method and/or apparatus for twin screw extruder the life of extruder screws is needed by making them more resistant to wear wherein the method does not compromise the structural integrity of the screw, nor produce fragments that contaminates the single screw extruder, and is not overly complex, involved or expensive.
This news from here: http://www.giant-extruder.com/news/item_5849.html
About the Author
what lead do i need to connect my computer to my tv and use it as a moniter?
the leads i look at have screws attached to them on both ends but the laptop does not. can anyone clarify this? ie is there a lead available which only has screws on one end only?
you can only use the TV as a monitor if the TV itself has the right connections to accept a cable from your laptop or PC.
The most common cable is the VGA, the standard 15pin D-Sub connector to many monitors. You plug one end into the TV and the other to the laptop, you can choose whether to tighten the screws or not, sometimes if there is a bend in the cable tightening the screws will ensure a good connection always.
The other common connection is HDMI, found on most new TVs but only on some Laptops and PCs. This requires an HDMI socket at both ends of the cable or and HDMI conversion socket. There is no conversion cable for VGA to HDMI that gives a good quality image.
The other alternatives are HDMI or AV Input from the TV to the computer, HDMI on TVs is not common but is available on some models. Most TVs have an AV socket and more commonly it is what you plug your console into to get the images on the TV (it is on the Wii for example).
R&P vs Lead Screws
