Bar Plug
Here are Todays Awesome Bar Plug Deals
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 16g 1 4 2mm 25mm 3mm TINY CZ TRAGUS CARTILAGE HELIX EAR Piercing Bar Earring $5.95 Time Remaining: 13d 9h 57m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 00g 10mm Flesh Tunnels Ear Plugs Earlets Tunnel 00 G Gauge Plug Screw Rings 0011 $4.99 Time Remaining: 1h 35m Buy It Now for only: $5.99 Buy It Now | Bid now | Add to watch list |
 2pc 16g Steel Black Barbell Nipple Nose Ear Rings 1DL $4.49 Time Remaining: 1h 19m Bid now | Add to watch list |
 18g 1 4 2mm 25mm 3mm Tiny Tragus Cartilage Helix Ear Stud Bar Earring Cute $5.95 Time Remaining: 23d 21h 19m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 14g 16mm Captive Bead Ring Bar CBR Nipple Belly Eyebrow Body jewelry Lot WNBK $15.98 Time Remaining: 17h 46m Bid now | Add to watch list |
 16g CZ Prong Set Tragus Helix Cartilage Piercing Stud Bar Ear Earring 10 COLORS $4.95 Time Remaining: 27d 10h 28m Buy It Now for only: $4.95 Buy It Now | Add to watch list |
 6g gauge 4mm x 16mm ball closure rings eyebrow piercing lip ring tragus bar LAVM $11.30 Time Remaining: 13h 15m Buy It Now for only: $12.60 Buy It Now | Bid now | Add to watch list |
 3 4 20mm Flesh Tunnels Ear Plugs Earlets Tunnel Gauge Plug Double Flare U0451 $8.99 Time Remaining: 19h 9m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Elegant Industrial Barbell 14g 1 1 2 PINK CZ FLOWER VINE Gem Swirl Steel CUTE $11.95 Time Remaining: 18d 10h 38m Buy It Now for only: $11.95 Buy It Now | Add to watch list |
 2g 6mm Flesh Tunnels Ear Plugs Earlets Tunnel 2 Gauge Double Flare Earring U0450 $4.99 Time Remaining: 1d 4h 46m Buy It Now for only: $5.99 Buy It Now | Bid now | Add to watch list |
 16g 1 4 CZ Prong Set Tragus Cartilage Helix Piercing Stud Bar Earring 3 COLORS $6.75 Time Remaining: 13d 20h 6m Buy It Now for only: $6.75 Buy It Now | Add to watch list |
 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel Earring Gauge Double Flare U0450 $3.99 Time Remaining: 1d 4h 48m Buy It Now for only: $4.99 Buy It Now | Bid now | Add to watch list |
 16 Piece 9 16 14mm Flesh Tunnels Ear Plugs Earlet Tunnel Plug Ring Rings Gauge $9.99 Time Remaining: 1d 5h 4m Buy It Now for only: $12.99 Buy It Now | Bid now | Add to watch list |
 16g 1 4 2mm 25mm 3mm Gem 10 COLORS Tiny Tragus Cartilage Helix Ear Stud $5.95 Time Remaining: 25d 9h 25m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 16 Piece 1 2 12mm Flesh Tunnels Ear Plugs Earlet Tunnel Plug Ring Earrings Gauge $9.99 Time Remaining: 1d 4h 32m Buy It Now for only: $12.99 Buy It Now | Bid now | Add to watch list |
 16g 1 4 2mm TINY CZ CLEAR TRAGUS CARTILAGE Piercing Stud Bar Ear Earring CUTE $5.95 Time Remaining: 29d 19h 37m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 16 Pieces of 5 8 16mm Tunnels Ear Plugs Earlets Tunnel Double Flare Plug Gauge $9.99 Time Remaining: 1d 6h 16m Buy It Now for only: $14.99 Buy It Now | Bid now | Add to watch list |
 8 Pieces 0g 8mm Ear Plugs Tunnels Tunnel Double Flare Plug 0 Gauge Earlets Rings $9.99 Time Remaining: 19h 59m Buy It Now for only: $14.99 Buy It Now | Bid now | Add to watch list |
 CZ Clear Flower 4 Gem Prong Set Tragus Cartilage Helix Piercing Stud Bar Earring $5.95 Time Remaining: 10d 7h 49m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 00g 10mm Flesh Tunnels Ear Plugs Earlet Tunnel Plug Ring Rings 00 Gauge Silicone $9.99 (1 Bid) Time Remaining: 1d 17h 52m Bid now | Add to watch list |
 16g 1 4 2mm TINY CZ TRAGUS CARTILAGE HELIX EAR Piercing Stud Bar Earring CUTE $5.95 Time Remaining: 14d 19h 30m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 11 16 18mm Flesh Tunnels Ear Plugs Earlets Tunnel Gauge Plug Double Flare 0451U $8.99 Time Remaining: 1d 4h 55m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 4 Pieces 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Rings Gauge 0300U $8.99 Time Remaining: 1d 3h 56m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Pair 16g W 4g Look Black Fake Cheater Ear Plugs $3.69 Time Remaining: 19d 1h 37m Buy It Now for only: $3.69 Buy It Now | Add to watch list |
 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel G Gauge Plug Double Flare 0451U $8.99 Time Remaining: 1d 4h 55m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 2 White 8mm Fake Cheater Ear Plugs 2AC $3.90 Time Remaining: 7d 1h 3m Buy It Now for only: $3.90 Buy It Now | Add to watch list |
 1 2 12mm New Spider Web 316L Stainless Steel Single Flare Ear Plugs Tunnels $0.71 (4 Bids) Time Remaining: 13h 41m Bid now | Add to watch list |
 0g 8mm Flesh Tunnels Tunnel Earlet Ear Plugs Silicone 0 Gauge Plug Rings Ring G $9.99 (1 Bid) Time Remaining: 1d 16h 18m Bid now | Add to watch list |
 PAIR 16g With 0g Look Milky White Cheater Cheaters Fake Ear Plugs $4.87 Time Remaining: 14d 11h 53m Buy It Now for only: $4.87 Buy It Now | Add to watch list |
 9 16 14mm Flesh Tunnels Ear Plugs Earlets Tunnel G Gauge Plug Double Flare 0451U $8.99 Time Remaining: 1d 4h 55m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Pair 16g W 2g Look Black Fake Cheater Ear Plugs Gauges Emo Goth Style $3.99 Time Remaining: 29d 13h 55m Buy It Now for only: $3.99 Buy It Now | Add to watch list |
 16 Pieces 00g 10mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Rings Gauge Ring $9.99 (1 Bid) Time Remaining: 1d 4h 34m Bid now | Add to watch list |
 8 Pieces 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug 1 2 Gauge 0301U $5.99 Time Remaining: 11h 29m Buy It Now for only: $6.99 Buy It Now | Bid now | Add to watch list |
 5 Pairs MIX Steel Fake Ear Studs Plugs Taper Earrings Piercing $1.00 Time Remaining: 22d 12h 5m Buy It Now for only: $1.00 Buy It Now | Add to watch list |
 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel 1 2 Gauge Plug Wholesale 0012U $9.99 Time Remaining: 1d 15h 37m Buy It Now for only: $15.99 Buy It Now | Bid now | Add to watch list |
 Pair PINK 14g Round Prong Set Nipple Barbells Rings Bar CZ Gems Jeweled Steel $9.95 Time Remaining: 27d 21h 9m Buy It Now for only: $9.95 Buy It Now | Add to watch list |
 1 2 12mm Flesh Tunnels Tunnel Earlets Ear Plugs Silicone Gauge Plug Rings Ring $9.99 Time Remaining: 1d 16h 56m Buy It Now for only: $14.99 Buy It Now | Bid now | Add to watch list |
 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel 1 2 Gauge Plug Screw Rings 0010 $9.99 Time Remaining: 1d 18h 46m Buy It Now for only: $13.99 Buy It Now | Bid now | Add to watch list |
 16g Eyebrow Ring Bar Tragus Piercing Curved UV Lot 3IIW $8.00 Time Remaining: 12d 13h 39m Buy It Now for only: $8.00 Buy It Now | Add to watch list |
 5 8 16mm Flesh Tunnels Ear Plugs Earlets Tunnel G Gauge Plug Double Flare 0451U $8.99 Time Remaining: 1d 4h 55m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Industrial Barbell 14g 1 1 4 31mm SPARROW SONG BIRD Ear Bar EZ INSERT $10.95 Time Remaining: 7h 33m Buy It Now for only: $10.95 Buy It Now | Add to watch list |
 7 8 22mm Flesh Tunnels Tunnel Earlet Ear Plugs Silicone Gauge Plug Rings Ring $5.99 Time Remaining: 1d 18h 29m Buy It Now for only: $6.99 Buy It Now | Bid now | Add to watch list |
 0g 8mm Flesh Tunnels Ear Plugs Earlets Tunnel 0 G Gauge Plug Double Flare U0451 $8.99 Time Remaining: 1d 4h 55m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 PAIR noctilucent Ear Barbell Rings Piercing Cheater Tapers 0G FAKE EAR PLUG F004 $2.99 Time Remaining: 7d 7h 15m Buy It Now for only: $2.99 Buy It Now | Add to watch list |
 14g 16mm 3 8 Inch 10mm Belly Button Navel Bar Ring Sheild Body Piercing WNBE $15.80 Time Remaining: 1d 18h Bid now | Add to watch list |
 CZ STAR Prong Set Tragus Cartilage Helix Piercing Stud Bar Earring 3 COLORS CUTE $5.95 Time Remaining: 27d 8h 37m Buy It Now for only: $5.95 Buy It Now | Add to watch list |
 Lot 8 16g 12mm Fake Ear Plugs 6mm 8mm 10mm 12mm Cheater Ring 1 2 00g 0g 2g Plug $9.99 Time Remaining: 5h 19m Buy It Now for only: $10.99 Buy It Now | Bid now | Add to watch list |
 3 4 20mm Flesh Tunnels Ear Plugs Earlets Screw Tunnel 3 4 Gauge Plug Rings Y0001 $9.99 Time Remaining: 1d 5h 10m Buy It Now for only: $11.99 Buy It Now | Bid now | Add to watch list |
 2GA 6mm FAKE PLUGS with 18 Gauge 10mm 316L Steel Shaft Ear Cheater Plugs Lot 2 $5.69 Time Remaining: 22d 19h 27m Buy It Now for only: $5.69 Buy It Now | Add to watch list |
 14g gauge 16mm x 10mm labret lip rings monroe earrings bars ball jewellery GBJC $7.10 Time Remaining: 6h 38m Buy It Now for only: $7.90 Buy It Now | Bid now | Add to watch list |
 2 x 16G 6mm Black UV Cheater Fake Ear Plugs $4.34 Time Remaining: 11d 19h 15m Buy It Now for only: $4.34 Buy It Now | Add to watch list |
 3 4 20mm Silicone Flesh Tunnels Ear Plugs Earlets Tunnel 3 4 G Gauge Plug U0332 $2.99 Time Remaining: 1d 4h 41m Buy It Now for only: $3.99 Buy It Now | Bid now | Add to watch list |
 16 Pieces 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Rings Gauge Ring $9.99 Time Remaining: 3d 17m Buy It Now for only: $12.99 Buy It Now | Bid now | Add to watch list |
 1 PAIR black 7mm FAKE CHEATER EAR PLUGS EARRINGS 14G F094 $1.99 Time Remaining: 7d 7h 18m Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 14g 16mm 3 8 Inch 10mm Heart Belly Ear Ring Navel Button Bar Body Jewelry WNBN $19.73 Time Remaining: 3d 19h 12m Bid now | Add to watch list |
 10 MIX Rhinestone Crystal 316L Steel Tragus Ear Studs Barbell Bar Ring Plugs $1.79 Time Remaining: 19d 18h 30m Buy It Now for only: $1.79 Buy It Now | Add to watch list |
 16g 12mm Ear Ring Earlets Earrings Spike Barbell Body Piercing Jewelry GIFT Q61 $7.25 Time Remaining: 1d 18h 42m Buy It Now for only: $8.05 Buy It Now | Bid now | Add to watch list |
 8 Pieces 0g 8mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug 0 G Gauge G 0302U $5.99 Time Remaining: 19h 38m Buy It Now for only: $6.99 Buy It Now | Bid now | Add to watch list |
 2 x 16G 5mm Surgical Steel Star Cheater Fake Ear Plugs $6.31 Time Remaining: 13d 11h 50m Buy It Now for only: $6.31 Buy It Now | Add to watch list |
 4 Pieces 2g 6mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug 2 G Gauge G 0300U $8.99 Time Remaining: 2d 20h 44m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Grade 23 G23 Titanium 6ga 6G 15mm Segment Captive Ring Silver Tone Piercing $7.99 Time Remaining: 28d 22h 55m Buy It Now for only: $7.99 Buy It Now | Add to watch list |
 16g gauge 12mm 1 4 Inch 6mm Black Labret Lip Chin Monroe Ear Bar Ring Lot EGHN $11.36 Time Remaining: 20h 54m Bid now | Add to watch list |
 00g 10mm Earrings Ear Plugs Rings Spiral Gauge Taper Stretcher 00G Tunnel Tunels $8.99 Time Remaining: 19h 5m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 2 Black Fake Cheater Ear Plugs 8mm Fake 16g K2 $3.90 Time Remaining: 13d 41m Buy It Now for only: $3.90 Buy It Now | Add to watch list |
 16 Pieces of 6g 4mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Ring Rings Gauge $8.99 Time Remaining: 2d 15h 1m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Elegant Industrial Barbell 14g 1 1 2 BLACK CZ FLOWER VINE Gem Swirl Steel $11.95 Time Remaining: 18d 10h 59m Buy It Now for only: $11.95 Buy It Now | Add to watch list |
 1 2 12mm Flesh Tunnels Ear Plugs Earlets Tunnel 1 2 Gauge Plug Ring Rings 0010 $5.99 Time Remaining: 11h 38m Buy It Now for only: $6.99 Buy It Now | Bid now | Add to watch list |
 1 2 12mm Ear Plugs Flesh Tunnels Tunnel Flare Plug 1 2 Gauge Earlets Rings O010 $5.99 Time Remaining: 18h 58m Buy It Now for only: $6.99 Buy It Now | Bid now | Add to watch list |
 Pair 16g W 0g Look Black Fake Cheater Ear Plugs Gauges $4.91 Time Remaining: 1d 16h 50m Buy It Now for only: $4.91 Buy It Now | Add to watch list |
 16g 12mm Fake Ear Plugs Rings Cheater Gauge 00g 10mm Taper Earrings Ring 0051A $9.99 Time Remaining: 18h 33m Buy It Now for only: $11.99 Buy It Now | Bid now | Add to watch list |
 Punk Pair New Logos Body Jewelry Fake Ear Plugs Ear Tunnles Look 00G Pick Logos $1.99 Time Remaining: 11d 17h 24m Buy It Now for only: $1.99 Buy It Now | Add to watch list |
 16g 12mm Fake Ear Plugs Rings Cheater Gauge 00g 10mm Taper Earrings Ring 0053A $9.99 Time Remaining: 19h 15m Buy It Now for only: $11.99 Buy It Now | Bid now | Add to watch list |
 16 Piece 3 4 20mm Flesh Tunnels Ear Plugs Earlet Tunnel Plug Ring Rings Gauge $9.99 Time Remaining: 3d 16h 14m Buy It Now for only: $13.99 Buy It Now | Bid now | Add to watch list |
 16G Black Fake Cheater Stainless Steel Ear Plugs Earrings Look 2G 0G 6mm 8mm $6.75 Time Remaining: 11d 14h 5m Buy It Now for only: $6.75 Buy It Now | Add to watch list |
 00g 10mm Ear Plugs Flesh Tunnels Tunnel Plug 00 Gauge G Earlets Rings Ring O001 $7.99 Time Remaining: 1d 18h 48m Buy It Now for only: $8.99 Buy It Now | Bid now | Add to watch list |
 GLOW IN THE DARK CHEATER PLUG FAKE EAR PLUG 00 GA LOOK $3.29 Time Remaining: 13d 41m Buy It Now for only: $3.29 Buy It Now | Add to watch list |
 2pc 18g Steel Spike Barbell White Nose Nipple Rings 0tJ $3.99 (1 Bid) Time Remaining: 19h 20m Bid now | Add to watch list |
 16 Pieces of 0g 8mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Ring Rings Gauge $9.99 Time Remaining: 2d 14h 34m Buy It Now for only: $12.99 Buy It Now | Bid now | Add to watch list |
 Pair 16g W 2g Look Black Fake Cheater Ear Cheaters Plugs $3.99 Time Remaining: 8d 18h 26m Buy It Now for only: $3.99 Buy It Now | Add to watch list |
 2pc 18g Steel White Curve Barbell Ear Eyebrow Rings 0mF $3.99 Time Remaining: 15h 54m Bid now | Add to watch list |
 16G 6mm Yellow UV Cheater Fake Ear Plug Taper Stretcher $2.66 Time Remaining: 1d 21h 24m Buy It Now for only: $2.66 Buy It Now | Add to watch list |
 Lot 16g gauge 12mm Captive Bead Ring Bar CBR Nipple Ear Gem Body Piercing WJCX $7.10 Time Remaining: 1d 14h 38m Buy It Now for only: $7.90 Buy It Now | Bid now | Add to watch list |
 16g 12mm Fake Ear Plugs Rings Cheater Gauge 00g 10mm Taper Earrings Ring 0051A $9.99 Time Remaining: 19h 32m Buy It Now for only: $11.99 Buy It Now | Bid now | Add to watch list |
 16G White Black Acrylic Fake Cheater Ear Plugs Earrings Look 0G 8mm 1 Pair $4.95 Time Remaining: 5d 11h 12m Buy It Now for only: $4.95 Buy It Now | Add to watch list |
 14g 3 8 Inch 10mm Handcuff dangle Belly Ear Ring Navel Button Body Jewelry WNBF $12.23 Time Remaining: 2d 19h 21m Bid now | Add to watch list |
 Industrial Barbell 14g 1 1 2 Tanzanite Purple GEM FLOWER SWIRL VINE EZ INSERT $11.95 Time Remaining: 18d 13h 4m Buy It Now for only: $11.95 Buy It Now | Add to watch list |
 5 8 16mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Ring Rings Earlet Gauge G $9.99 Time Remaining: 2d 14h 47m Buy It Now for only: $14.99 Buy It Now | Bid now | Add to watch list |
 0g 8mm Earrings Ear Plugs Rings Spiral Gauge Taper Stretcher 0 G Tunnel Tunels $8.99 Time Remaining: 18h 43m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Fake Plugs Steel 16g 12m 2g 6m Cheater Plugs Lot 2 $5.69 Time Remaining: 7h 58m Buy It Now for only: $5.69 Buy It Now | Add to watch list |
 16g 12mm Fake Ear Plugs Rings Cheater Gauge 00g 10mm Taper Earrings Ring 0058A $9.99 Time Remaining: 20h 15m Buy It Now for only: $11.99 Buy It Now | Bid now | Add to watch list |
 LOT OF 50 NEW TONGUE RING PIERCING JEWELRY TOUNGE BARS $14.99 Time Remaining: 29d 10h 37m Buy It Now for only: $14.99 Buy It Now | Add to watch list |
 16g gauge 12mm Eyebrow Piercings Rings Bar Dice Curved Tragus Earrings Lot WNBR $13.33 Time Remaining: 18h 46m Bid now | Add to watch list |
 00g 10mm Earrings Ear Plugs Rings Spiral Gauge Taper Stretcher 00G Tunnel Tunels $8.99 Time Remaining: 4d 8h 22m Buy It Now for only: $9.99 Buy It Now | Bid now | Add to watch list |
 Industrial Barbell 14g 1 1 4 31mm MACHINE GUN Ear Bar Steel EZ INSERT $10.95 Time Remaining: 17d 20h 31m Buy It Now for only: $10.95 Buy It Now | Add to watch list |
 16g 12mm Fake Ear Plugs Rings Cheater Gauge 0g 8mm Taper Earrings Ring 0055A $7.99 Time Remaining: 19h 1m Buy It Now for only: $8.99 Buy It Now | Bid now | Add to watch list |
 DO IT YOUR SELF piercing needles 20G 4G Body Jewelry Horse Shoe Industrial Bars $1.50 Time Remaining: 12d 9h 26m Buy It Now for only: $1.50 Buy It Now | Add to watch list |
 16 Pieces of 0g 8mm Flesh Tunnels Ear Plugs Earlets Tunnel Plug Ring Rings Gauge $9.99 Time Remaining: 2d 23h 32m Buy It Now for only: $12.99 Buy It Now | Bid now | Add to watch list |
 PAIR Body Piercing Cheater Tapers Body Jewelry 0G FAKE CHEATER 18G EARINGS F014 $1.75 (2 Bids) Time Remaining: 3h 8m Bid now | Add to watch list |
 5 Pairs MIX Steel Fake Ear Studs Plugs Taper Earrings Piercing $0.99 Time Remaining: 6h 48m Buy It Now for only: $0.99 Buy It Now | Add to watch list |
 00g 10mm Flesh Tunnels Ear Plugs Earlets Tunnel Gauge Plug Rings Ring 00 G 0010Y $9.99 Time Remaining: 1d 5h 9m Buy It Now for only: $11.99 Buy It Now | Bid now | Add to watch list |
More Great Information on Bar Plug:
Plug and mandrel bar for seamless steel pipe rolling operation for manufacturing seamless steel pipe
This invention relates to a plug and a mandrel bar for a
seamless steel pipe
rolling operation and a method for manufacturing a seamless steel pipe, and more particularly a method for manufacturing a plug having as its outer shape a bullet-like shape, a rod-like member used for punching a hole at a steel piece, expanding a diameter of a pipe or extending a raw pipe which are installed as a tool of a pipe rolling machine such as a piercing machine, an elongating machine, a plug mill, a reel machine and a mandrel mill or the like and for manufacturing a seamless steel pipe using these materials.
In the specification of the present invention, the plug used in each of the aforesaid pipe rolling machines is properly called as a piercing plug, an elongating plug or the like by applying a name of the pipe rolling machine. In addition, in the case of the mandrel mill, the aforesaid rod-like member corresponds to a plug for another rolling machine and this is called as a mandrel bar.
In order to manufacture a seamless steel pipe by applying a Mannesman Pipe Manufacturing Method, for example, at first a round steel piece heated up to a predetermined temperature (hereinafter called as a billet) is punched with the aforesaid plug by applying a slant type drilling machine called as a piercing machine and rolled to make a hollow raw pipe (hereinafter called as a hollow member). Then, the hollow member is rolled under application of a plug or a mandrel bar (hereinafter merely called as a bar) by the extending and rolling machine such as an elongating machine, a plug mill, a reel machine or a mandrel mill or the like in the same manner as that described above so as to reduce its wall thickness. Further, as required, after the rolled pipe is heated again, its outer diameter is reduced without using any plug in a squeezing rolling machine or a non-proportional rolling machine such as a reducing machine and a sizing machine. In this case, the hollow raw pipe rolled by a plug mill, a reel machine and a mandrel mill or the like is called as a shell.
However, the plug is always exposed under a high temperature and a high load through a continuous contact with the heated billet or hollow member at the stage of punching and rolling operation performed by the aforesaid piercing machine, resulting in that the plug is quite easily worn out and melt lost. In the prior art, since the plug was made of steel, the plug was heat treated at about 900 to 1000° C. as a countermeasure against a worn-out loss and a scale film of several 10 to several 100 μm was formed. However, when such a plug as above is used in making a pipe of high alloy steel containing Cr of 5 wt. % of which demand is increased in particular in recent years, the plug is merely endurable against several number of billets and its life is remarkably short.
In turn, as a countermeasure for extending the life of the plug, there is provided a usage of plug in addition to a modification of the aforesaid material quality of the plug. Either the official gazette of Japanese Patent Laid-Open No. Sho 51-133167 or the official gazette of Japanese Patent Laid-Open No. Hei 1-180712, for example, has a proposal about a technology that the punching and rolling can be carried out while lubricant is being injected from the extremity end of the plug and in turn the official gazette of Japanese Patent Laid-Open No. Hei 5-138213 has a proposal about a technology that the punching and rolling can be performed after lubricant is coated in advance at the surface of the plug, respectively. However, the technology for injecting the lubricant from the extremity end of the plug shows a problem that the injection hole at the extremity end is clogged and in turn the technology for coating lubricant before punching and rolling operation shows a problem that only a required amount of lubricant can be uniformly coated at the surface of the plug. In addition, these both technologies have a common economical problem of increasing cost in manufacturing a pipe under the application of lubricant and so they may not employed in view of their industrial application.
In view of the circumstances described above, the present inventors have vigorously studied about an extension of life of the plugs and bars for use in manufacturing a seamless steel pipe. The study was carried out such that as the rolled material, the billet of high alloy steel was selected in the model mill of which size was reduced to about 1/3 of that of the actual machine, various kinds of experiments of punching and rolling as well as extending and rolling were performed and then the attained results were confirmed afterwards by the actual machine.
As a result, the countermeasure based on the method of using the plug together with lubricant shows a problem of which resolution is quite difficult such as a clogging at the injection hole caused by lubricant or its increased cost. To the contrary, it has been concluded that the improvement caused by modification of material quality of the plug needs a certain amount of improvement under utilization of a recent development or an improved raw material.
In other words, it is an object of the present invention to provide a new plug and a new bar for use in rolling a seamless steel pipe capable of more remarkably improving a life than that of the prior art even under a severe condition of application always exposed to a high temperature and a high load. Then, the present invention provides a method for attaining a seamless steel pipe having a more superior quality than that of the prior art under application of these members.
Accordingly, the present invention is constructed such that as raw material for the plug and the bar for a seamless steel pipe, ceramics is employed, resulting in that a life of these members is substantially improved. In addition, as a result of the arrangement in which either the aforesaid plug or the aforesaid bar is applied for manufacturing the seamless steel pipe, time required for performing a replacing work for these members is shortened and its productivity is remarkably improved more than that of the prior art.
Can you make a "silly sentence" using these words?(10 points)?
All these terms are referring to "internet basics" and/or computer components.
i only need FIVE in the sentence
heres a list:
LAN
WAN
Network
Server
URL
HTML
Blog(s)
Embedded
Wi-FI
Bandwidth
Router
Address Bar
Plug-in
Case
Motherboard
Power supply
CPU
RAM
Drives
Cable(s)
Port(s)
BIOS
i would love your opinions
thankyou
-Brooke[:
This is SCHOOL related, although im a senior, i have to keep it PG. 
I'll plug-in that driver to your port, just like I embedded my router in your motherboard.
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This entry was posted on Wednesday, December 31st, 2008 at 5:39 pm and is filed under Body Piercing. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.