为适应工业环境使用,与一般控制装置相比较,PLC机有以下特点:
1. 可靠性高,抗干扰能力强
工业生产对控制设备的可靠性要求:
①平均故障间隔时间长
②故障修复时间(平均修复时间)短
任何电子设备产生的故障,通常为两种:
①偶发性故障。由于外界恶劣环境如电磁干扰、超高温、超低温、过电压、欠电压、振动等引起的故障。这类故障,只要不引起系统部件的损坏,一旦环境条件恢复正常,系统也随之恢复正常。但对PLC而言,受外界影响后,内部存储的信息可能被破坏。
②**性故障。由于元器件不可恢复的破坏而引起的故障。
如果能限制偶发性故障的发生条件,如果能使PLC在恶劣环境中不受影响或能把影响的后果限制在**小范围,使PLC在恶劣条件消失后自动恢复正常,这样就能提高平均故障间隔时间;如果能在PLC上增加一些诊断措施和适当的保护手段,在**性故障出现时,能很快查出故障发生点,并将故障限制在局部,就能降低PLC的平均修复时间。为此,各PLC的生产厂商在硬件和软件方面采取了多种措施,使PLC除了本身具有较强的自诊断能力,能及时给出出错信息,停止运行等待修复外,还使PLC具有了很强的抗干扰能力。
·硬件措施:
主要模块均采用大规模或超大规模集成电路,大量开关动作由无触点的电子存储器完成,I/O系统设计有完善的通道保护和信号调理电路。
① 屏蔽——对电源变压器、CPU、编程器等主要部件,采用导电、导磁良好的材料进行屏蔽,以防外界干扰。
② 滤波——对供电系统及输入线路采用多种形式的滤波,如LC或π型滤波网络,以消除或抑制高频干扰,也削弱了各种模块之间的相互影响。
③ 电源调整与保护——对微处理器这个核心部件所需的+5V电源,采用多级滤波,并用集成电压调整器进行调整,以适应交流电网的波动和过电压、欠电压的影响。
④ 隔离——在微处理器与I/O电路之间,采用光电隔离措施,有效地隔离I/O接口与CPU之间电的联系,减少故障和误动作;各I/O口之间亦彼此隔离。
⑤ 采用模块式结构——这种结构有助于在故障情况下短时修复。一旦查出某一模块出现故障,能迅速更换,使系统恢复正常工作;同时也有助于加快查找故障原因。
·软件措施:
有极强的自检及保护功能。
①故障检测——软件定期地检测外界环境,如掉电、欠电压、锂电池电压过低及强干扰信号等。以便及时进行处理。
②信息保护与恢复——当偶发性故障条件出现时,不破坏PLC内部的信息。一旦故障条件消失,就可恢复正常,继续原来的程序工作。所以,PLC在检测到故障条件时,立即把现状态存入存储器,软件配合对存储器进行封闭,禁止对存储器的任何操作,以防存储信息被冲掉。
③设置警戒时钟WDT(看门狗)——如果程序每循环执行时间超过了WDT规定的时间,预示了程序进入死循环,立即报警。
④加强对程序的检查和校验——一旦程序有错,立即报警,并停止执行。
⑤对程序及动态数据进行电池后备——停电后,利用后备电池供电,有关状态及信息就不会丢失。
PLC的出厂试验项目中,有一项就是抗干扰试验。它要求能承受幅值为1000V,上升时间1nS,脉冲宽度为1μS的干扰脉冲。一般,平均故障间隔时间可达几十万~上千万小时;制成系统亦可达4~5万小时甚至更长时间。
2 .通用性强,控制程序可变,使用方便
PLC品种齐全的各种硬件装置,可以组成能满足各种要求的控制系统,用户不必自己再设计和制作硬件装置。用户在硬件确定以后,在生产工艺流程改变或生产设备更新的情况下,不必改变PLC的硬设备,只需改编程序就可以满足要求。因此,PLC除应用于单机控制外,在工厂自动化中也被大量采用。
3.功能强,适应面广
现代PLC不仅有逻辑运算、计时、计数、顺序控制等功能,还具有数字和模拟量的输入输出、功率驱动、通信、人机对话、自检、记录显示等功能。既可控制一台生产机械、一条生产线,又可控制一个生产过程。
4.编程简单,容易掌握
目前,大多数PLC仍采用继电控制形式的“梯形图编程方式”。既继承了传统控制线路的清晰直观,又考虑到大多数工厂企业电气技术人员的读图习惯及编程水平,所以非常容易接受和掌握。梯形图语言的编程元件的符号和表达方式与继电器控制电路原理图相当接近。通过阅读PLC的用户手册或短期培训,电气技术人员和技术工很快就能学会用梯形图编制控制程序。同时还提供了功能图、语句表等编程语言。
PLC在执行梯形图程序时,用解释程序将它翻译成汇编语言然后执行(PLC内部增加了解释程序)。与直接执行汇编语言编写的用户程序相比,执行梯形图程序的时间要长一些,但对于大多数机电控制设备来说,是微不足道的,完全可以满足控制要求。
5.减少了控制系统的设计及施工的工作量
由于PLC采用了软件来取代继电器控制系统中大量的中间继电器、时间继电器、计数器等器件,控制柜的设计安装接线工作量大为减少。同时,PLC的用户程序可以在实验室模拟调试,更减少了现场的调试工作量。并且,由于PLC的低故障率及很强的监视功能,模块化等等,使维修也极为方便。
6.体积小、重量轻、功耗低、维护方便
PLC是将微电子技术应用于工业设备的产品,其结构紧凑,坚固,体积小,重量轻,功耗低。并且由于PLC的强抗干扰能力,易于装入设备内部,是实现机电一体化的理想控制设备。以三菱公司的F1-40M型PLC为例:其外型尺寸仅为305×110×110mm,重量2.3kg,功耗小于25VA;而且具有很好的抗振、适应环境温、湿度变化的能力。现在三菱公司又有FX系列PLC,与其超小型品种F1系列相比:面积为47%,体积为36%,在系统的配置上既固定又灵活,输入输出可达24~128点。
link-Belt linkBelt Cylindrical Roller Bearing M5208TV New
INA NA49062RSR Bearing NA 4906 2RSR New
NEW NDH SHIELD BEARING 5304
SealMaster Gold Line Standard Bearing 3-23T 323T 2 3/16" Bore New
MRC Single Row Rubber Sealed Ball Bearing 204SZZ Steel/C3/ABEC-1 New
NEW SKF TAPERED BORE 1213 KJ BEARING 1213K L-13 N3
Nachi Single Row Ball Bearing 6208ZE 112895 New
NEW FAG SINGLE ROW BALL BEARING 6004 C3 6004C3
NEW NO NAME ROD END BEARING STAINLESS HOUSING 3/8"-24 LH MALE THREADS 3/8"ID
NEW INA BEARING WITH INNER RACE NA22/8.2RS NA22/82RS
MRC TRW Roller Ball Bearing H001 R6 H001R6 H001-R6 NEW
NEW MARTIN SPLIT TAPER BUSHING SD 1-7/8 SD178 1-7/8" BORE
Morse SealMaster Bearing ER-22 ER22 1 1/2" Shaft Size New
NEW FAFNIR BALL BEARING 5200KDD2
NEW FAG SELF ALIGNING BALL BEARING 2210K.TV.C3 2210KTVC3
NEW NTN/BOWER DIFFERENTIAL BEARING 33275 H100
SKF Shielded Ball Bearing 6307 2ZJ EM 63072ZJEM 6307-2Z 63072Z New
NEW OSBORN HEAVY DUTY LOAD RUNNER BEARING PLR-2-1/4-14 PLR21414 97346
NEW INA 4 BOLT FLANGE BEARING WITH COLLAR RCJ501
NEW MCGILL HEAVY NEEDLE BEARING GR-96-N GR96N
TIMKEN TAPERED ROLLER BEARING RACE M255410
NEW QM BLUE BRUTE EC SERIES PILLOW BLOCK BEARING QMP08J108SM QMP08J108S
NEW TORRINGTON ROLLER BEARING HJ-486024 HJ486024
NEW FAFNIR ROLLER BEARING 212NPP
MCGILL NEEDLE BEARING GR-32 GR32 NIB
NEW ConSOLIDATED NN3021AS.M.SP PRECISION DBL RW BEARING
Fafnir Torrington Pillow Block Bearing With Collar RAK 1 NT RAK1NT 1" Bore New
NEW SEAL MASTER 2 BOLT FLANGE BEARING SFT-10 SFT10 5/8" 58
NEW MRC BEARING 5208K
SKF Ball Bearing Flange Unit FY 10 SH 5/8 11-74 B-7847 New
NEW ASAHI INSERT BEARING WITH COLLAR KH202 205PR-E 205PRE
SKF Single Row Ball Bearing 1217 New
FAG Consolidated Thrust Ball Bearing 52205 New
Torrington 22217KCJW33 SPHERICAL ROLLER BEARING NEW
NEW NSK DEEP GROOVE BALL BEARING 6302UC3E C5 6302
SealMaster Flange Insert Bearing 2-010 2010 5/8" Shaft Size New
NEW MCGILL CAM FOLLOWER BEARING VCF 3-1/2 VCF312
MRC 5214CZZ Bearing Steel/C3/ABEC-1 New
NEW SKF 6009-2RS1/C3 BEARING 60092RS1C3
New General Bearing 6001-77-30E 6001ZZ E 6001ZZE 6001Z
SKF Deep Groove Ball Bearing 6210 2ZJEM 62102ZJEM 6210-2Z/C3HT51 5090X20MM New
Browning Keyed Bore Sprocket C5018XP 18 Teeth New in Box
NEW RHP SFT35 SELF-LUBE FLANGE BEARING 1035-35 SFT5-MSFT2 SFT35 RR AR3P5
NTN Pillow Block Bearing PL206V A-UL206-103 AUL206103 1-3/16" New
NEW TIMKEN ROLLER BEARING W/OUTER RACE 32211 X-32211 Y-32211 X32211 Y32211
NEW SKF BEARING 5211 A-Z/C3 5211AZC3
NEW AETNA BEARING A-899-3 A8993
Fafnir Insert Bearing w. Collar G1109KRRB New
Fafnir Insert Bearing w. Collar G1109KRRB New
MRC 112 KSZZ/0046 112KSZZ0046 Deep Groove Ball Bearing NEW
Torrington Fafnir Sealed Ball Bearing 9112PP New
Fag Roller Bearing NJ 408 M NJ408M NU408 NJ408 New
Scotsman Retainer Bearing A26708-001 A26708 001 A26708001 New
link-Belt Bearing MA1209W102 New
REXROTH PNUEMATIC REGULATOR PR-007565-21006 PR00756521006 3/4" NPT 300 PSI
NEW NO NAME ANNULAR BALL BEARING KZ3110-144-8668 DSA-500-67-C-1288
NEW MORSE SEAL MASTER SEALMASTER BEARING SHAFT SIZE 1-3/16 SM016 SL-19
FYH Pressed Steel Mounted Roller Bearing SBPP-201-8KG5 SBPP2018KG5 SB201-8 New
INA Insert Bearing w/ Collar GRA 103 NPPB-AS2/V GRA103NPPBAS2V New
MRC Single Row Ball Bearing 107KS H502 made in Italy New
Unsit Rubber Sealed Ball Bearing 1708 1621-2RSC3 Lot of 2 New
General Ball Bearing Insert with Collar 204PP KH204-12 KH20412 ER204-12 New
WARNER & SWASEY 6934-5556 00 230/480V WYE 5KVA 5 KVA 3PH TRANSFORMER
ABB STARTER A9-30-10 480V COIL 26A A AMP w/ T25 DU 0,25-0,4A A AMP
NEW FAG NK 50/25A NEEDLE BEARING NKJ45/25A
NEW NDH DELCO NEW DEPARTURE BEARING 3307 1-3307
General Electric General Purpose Relay CR120J00212 24V Coil 2 Pole 300VAC New
NEW FAFNIR ROLLER BEARING P MKP4A FS160 ABEC3 4/71 P MIL-G-23827
TOTAL SOURCE BEARING ASSEMBLY PM11205-08 OUTER RACE 25821 BEARING 25877 NIB
Timken Tapered Roller Bearing Cone 93825 New
NEW TORRINGTON IR-324024 IR324024 ROLLER BEARING MS-51962-27
Torrington One Way Needle Clutch Bearing FCB-20 FCB20 New
NEW DIXON ANDREWS 150-E-AL 1-1/2" ALUMINUM MALE BARBED CAMLOCK
NEW McGILL CF 2 1/2 SB CAM FOLLOWER BEARING CF212SB
INA CAM FOLLOWER CAMFOLLOWER KRE 90 PP KRE90PP
ThermOweld Mold Handle 40-4565-14 40456514
NEW TIMKEN 522B CUP BEARING RACE
Timken Tapered Roller Bearing Cup/Race LL641110 20024 New
SKF Bearing FYT 1.3/4 WF FYT1-3/4 WF NEW
NEW TIMKEN DOUBLE CUP BEARING ASSEMBLY 472D
INA NEEDLE BEARING INNER RING PIK-3224 PIK3224 NEW
SKF SLEEVE ADAPTER H 2315 H2315 KM15 H2315 NIB
ASK LINEAR MOTION SYSTEMS N-8VUU N 8VUU N8VUU NEW
Torrington Spherical Roller Bearing 22218VJW33 22218 VJ W33 New
Nachi Deep Groove Radial Roller Ball Bearing 6016 New
NEW SKF 51322M 51322 M THRUST BALL BEARING
BIMBA MRS-0212-D MRS0212D STAINLESS S/S 15" - 27" AIR PNEUMATIC CYLINDER NEW
(2) SKF Deep Groove Roller Bearing 6000-Z/C3 6000ZC3 Lot of 2 New
NEW SKF BEARING 6306-Z/C3 6306ZC3
CUTLER HAMMER POW-R-LINE 4000A 4000 AMP 480/277V SWITCHBOARD BREAKER PANELBOARD
NEW IKL SHIELDED ROLLER BEARING 6212-2Z 62122Z
NEW TIMKEN INSERT BEARING 1114KRR W/COLLAR
NOS DODGE S1USD307 3-7/16" SPECIAL DUTY BEARING 3 7/16"
NSK NN3016TBKRE44CC1P4 NN3016TBKRE44CC BEARING NIB
NEW ZKL 6410A SINGLE ROW BALL BEARING
SealMaster Gold Line 4 Bolt Flange Bearing MFC-31T MFC31T 1 15/16" Bore New
Fafnir Torrington 2 Bolt Flange Bearing VCJT 1/2 VCJT12 1/2" Bore
Fafnir Pillow Block Bearing RAS 13/16" T30365 New
NEW RHP SPHERICAL ROLLER BEARING 22214EJW33C3
Flowserve Sleeve 74811860 748118-60-014 New
NEW RPH SELF-LUBE FLANGE BEARING SFT1.3/4 SFT134 1045-1/3 4G
KETCHIE HOUSTON FLANGE BEARING KH-4195-10A NEW
link-Belt Insert Bearing w/ Collar U 223 D U223D 1-7/16" Bore New
NEW NTN BALL BEARING 6003ZD2PX31V25 LOT OF 2
Fafnir Sealed Roller Ball Bearing 9101KDD Lot of 2 New in Box
NEW BALTZER WHEEL NEEDLE CAGE ROLLER BEARING 01084
NEW KOK Bearing GW208PP17 1 15/64" Bore Diameter
NEW BCA INSERT BEARING WIC4
DOLAN-JENNER HIGH INTENSITY ILLUMINATOR PL8013AN1 115 VAC NIB
New Gilbos Bush Bushing 26726.01 2672601 05-24149
NEW MRC BEARING 7207PJDU-H501 7207PJDUH501
No Name Tapered Roller Bearing NS-746 NS746 New
NEW FAFNIR BALL BEARING 212NPP 212NPP FS50000 212NPPFS50000
MRC 309S 6309 TN9/C3 6309TN9C3 Single Row/Groove Bearing NEW
No Name 3-Groove Sheave Pulley SPA125 X 3 2012 SPA125X32012 New
NEW MRC BEARING 201 SZZ 201SZZ 6201
NEW SKF BEARING 608 2RSJEM 6082RSJEM
MITSUBISHI EXPANSION MODULE A0J2-E28DT AOJ2-E28DT
NEW NTN 2 BOLT FLANGE BEARING UELFLU-3/4 4YM10 3/4"
NEW FAG ROLLER BALL BEARING 7212B UA 7212BUA
NEW FAG ROLLER BALL BEARING 7212B UA 7212BUA
NEW FAG BEARING 6009.2ZR.J22R.L38 60092ZRJ22RL38 6009
NEW NACHI THRUST BEARING 033TA05
NEW HIWIN LINEAR GUIDEWAY BLOCK BEARING LGW30CBZ1H/ZZ LGW30CBZ1HZZ LG30
NEW IGUS LINEAR CARRIAGE TW-01-15 TW0115
NEW FEDERAL MOGUL 2-BOLT FLANGE TWG-1-1/4-R TWG114R
NEW BROWNING FLANGE BEARING VF2E-228 1-3/4" BORE VF2E228
NEW FAG BEARING 6206.C 6206C 6206.2RSR.C3.L12 62062RSRC3L12
INA Rubber Sealed Roller Ball Bearing 32042RS 32042RSEC301 New
Federal Mogul Single Deep Groove Ball Bearing R14FF 7/8X1-7/8X1/2IN New
KINNEY kc-5 KC-5R KC5R 1/3HP 1/3 HP 115/230V 1PH HIGH VACUUM PUMP
KINNEY KC-5 KC5 802497 1/3HP 1/3 HP 115/230V 1PH HIGH VACUUM PUMP
NDH Ball Bearing 3312 60mm x 130mm x 31mm New
(2) Mitsubishi Circuit Breaker NF30-CS NF30CS 10A 10 A Amp 500VAC 2 Pole Used
Fafnir Torrington Ball Bearing w. Collar RC 1-3/16 RC1316 1-3/16" Bore New
SKF ROLLER BALL BEARING 61928MA 61928-MA NEW
Steyr Consolidated Thrust Ball Bearing 52205 New
NEW NSK BEARING 6210VVC3 6210V
NEW NO NAME CARBON MOTOR BRUSH RE41BX 1-7/8"L 1-3/8"W 1/2"TH
NEW FAFNIR BALL BEARING AND COLLAR G1103KRR SM1103K BRG COL BRGCOL
NEW MRC BEARING 488505
MRC Special Bearing 312 YA 312YA Pat No. 1622880 New
SRO Consolidated Single Row Ball Bearing 98212 New
NEW PT STA-LOK BRASS QUICK CAM LOCK CAMLEVER COUPLING SLB11 10B 1" NPT FEMALE
SARCO F96133 A83 55224 TYPE 25 1" NPT PRESSURE REGULATOR VALVE REBUILT
Dodge Baldor Four Bolt Flange Bearing F4BSC200 124214 Size 2 New
NEW SKF DOUBLE ROW SELF ALIGNING BALL BEARING 1313 J 1313J 1313
Torrington HJRR-202820 Bearing HJRR202820 New
NEW TIMKEN TAPERED ROLLER BEARING 48286
NEW AUBURN BEARING 22-T100 22T100
Timken Roller Bearing Assembly Kit LM11749 90014 LM1174990014 New
NEW DODGE SC-1 5/16 B SC TAKE-UP BEARING 1-5/16 SC1516 461279
NEW FAFNIR BALL BEARING W309KLL
link-BELT 1341Y222-B 1341Y222B SIZE XR-1-1/2 XR COUPLING ACCESSORY PACK NEW
No Name Rubber Sealed Ball Bearing S6206RS New
NEW THE GENERAL ROLLER BEARING 210DD 6210 2RS 62102RS
2-INA Bearing SI050808 INA 19 INA19 10-SIF 10SIF 1D-SIF 1DSIF 1O-SIF 1OSIF
Donaldson Hydraulic Filter P171504 New in Box
SKF Roller Ball Bearing 7228 BCBM 7228BCBM New
Star Linear Pillow Block Bearing 1066-230-00 106623000
NSK SUPER PRECISION BEARING DOUBLE ROW NN3022MBKRCC1P4
NOS link-BELT PLB6880FR 5" 5 INCH PILLOW BLOCK BEARING HOUSING
SNR Self Aligning Ball Bearing 22213.EA.B33J30 2213EAB33J30 New
Aetna Thrust Ball Bearing E-17 E17 Made in USA New
NEW Fafnir 3MM208WI DUM C1 Super Precision Bearing 3MM208WIDUMC1
NEW DODGE 2 BOLT FLANGE BEARING 210 SXR 1-15/16 SXR11516 1 15/16" BORE
SKF Double Row Ball Bearing 5204 A-2Z/C3 5204A2ZC3 New
GE CR308B1**BAA SIZE SZ 0 115-120V COIL 208V FUSIBLE MOTOR STARTER COMBO
TIMKEN FAFNIR 4 BOLT FLANGE RCJ2 G1200KRRB C1 12V W232-5 271-1 PILLOW BLOCK
McGill Cam Follower Camfollower Bearing CCFH 1 1/8 SB CCFH118SB New
NEW FAFNIR BALL BEARING AND COLLAR G111OKRRB SM111OK BRG COL BRGCOL
NEW BCA 217L SINGLE SIDE metaL SHIELD BALL BEARING
NEW ALLEN BRADLEY AB PUSH PULL BUTTON 800FM-MP45 40MM YELLOW SER B
Fafnir Ball Bearing W203PP C7 FS50000 17MM ID 40MM OD New
NEW ConSOLIDATED TAPERED ROLLER BEARING WITH OUTER RACE 30212
NEW HI-LIGHT HYTROL SBTRD206-19GH 3-BOLT FLANGE BEARING SB206-19GH
NEW HI-LIGHT HYTROL SBPFTD205-16GH 2-BOLT FLANGE BEARING SB205-16GH
NEW JAF SELF ALIGNING BALL BEARING I-71220 I71220
Kaydon Reali Slim Single Row Ball Bearing KAA10CL0 9J6NN New
NEW NDH BEARING 3210
New INA Bearing 3307 2Z 33072Z
Martin Sabertooth Keyed Bore Sprocket 50BS12HT 1-1/4" New
AUTOMATION SERVICES & ConSULTANTS CIRCUIT BOARD CARD 100142 REV B
INA Cam Follower Camfollower KR 47 KR47 New
INA F-221-927 Cam Follower CamFollower Bearing F221927
KINNEY KC-5 KC5 802497 1/3HP 1/3 HP 115/230V 1PH VACUUM PUMP
NO NAME 50271-00 5027100 BALL BEARING NEW
New Timken Ball Bearing GRAE35RRB+COL GRAE35RRB COL
NEW NSK BEARING 5203-2RSTNGC3 52032RSTNGC3
NEW SKF ROLLER BEARING 2205 J 2205J 2205
PTI Rubber Sealed Roller Ball Bearing 2210-2RS 22102RS New
NO NAME 11" LINEAR BEARING RAIL 1 3/8" X 1" NEW
Swagelok Stainless S/S Steel Check Valve SS-58S8 SS58S8 1/2" Tube Fitting New
NEW KOYO ROLLER BEARING 7306BGC3 FY 7306BGC3 7306BGC3FY
INA Ball Bearing 3208-2Z 32082Z New
SKF Two Bolt Pillow Block Bearing SYH 107X SYH107X 477207-107 477207107 New
The General Roller Bearing 6306-88-30E 63068830E 6306RS New
NEW SKF BEARING 6304-Z/C3QE6 6304ZC3QE6 6304-Z/C3 6304ZC3
NTN Insert Bearing UCS207LD1NW2C3 UCS207C3 New
NEW SKF 4NU11 NU 411 ROLLER BEARING
NEW FAFNIR 10613 G1100KLLB 4-BOLT FLANGE BEARING W/ COLLAR G1100KLLB S100K
NEW MRC BEARING 204SFF H501 6204-2Z/C3 62042ZC3
NEW NTN UCFCX10D1 FLANGE CARTRIDGE BEARING UCX10 FCX10J UCFCX10J91
FAFNIR GC1010KRRB + COL BEARING W/ COLLAR New
NEW SKF BEARING 608-2Z/LHT23 6082ZLHT23
NEW TIMKEN FAFNIR 2 BOLT FLANGE BEARING W/COLLAR VCJT 3/4 GRA012RRB
No Name Thrust Bearing SK9020-9 SK90209 New
Bower Roller Bearing Cup Tapered Double 353-D 353D New
Fafnir Double Row Ball Bearing W208KLL W208 New
PROLUME MAGNETIC BALLAST M240RS/277 277 V VOLT CLASS P TYPE 1
NEW NO NAME S/S STAINLESS STEEL SET SCREW LOCKING SHAFT COLLAR 1-7/8"ID 2-3/4"OD
NEW INA / ANDREWS 915 THRUST BEARING
NEW SKF BEARING WITH INNER RACE 3 NU 11 3NU11 NU 311 NU311
Koyo Roller Bearing 22210EC3 22214RHRW33C3 New
SKF Double Row Ball Bearing 5216 A/C3 5216AC3 8014X44.4MM New
CUTLER HAMMER DH325NGK 400A 400 A AMP 240V FUSIBLE SAFETY DISConNECT SWITCH NIB
NEW BOWER OUTER BEARING RACE CUP HM89411
NEW FAG BEARING 629.2RS 6000.629RS "LOT OF 3"
NEW SEALMASTER SEAL MASTER BEARING 60-12 3/4"BORE 2-012 6012 2012
LOT OF 2 Steyr Deep Groove Single Row Roller Ball Bearing 2201 New In Box
NEW SEALMASTER SEAL MASTER TREL 12 ROD END HEIM JOINT 3/4-16 THREAD 3/4" BORE
Fafnir Radial Ball Bearing 311K New
NEW NTN SEALED BALL BEARING 6308LLBC3/5C 6308LLBC35C 6308LB
NEW TIMKEN TAPERED ROLLER BEARING 597
NEW SKF SELF ALIGNING BALL BEARING 1318 K C3 1318KC3 N 18 N18
NEW SUPER TORQUE TIMING BELT S8M 656 S8M656 1-9/16" WIDTH
NEW MB 4 BOLT FLANGE BEARING FCA-25-1 3/16 FCA2513/16
P&H PART BEARING 25Z685D5 P/O 00261527
NEW TIMKEN OUTER BEARING RACE 4335
CROUSE HINDS EXPLOSION PROOF PIN & SLEEVE PLUG BP-59 3 POLE 3P 2 W 2W 1 PH 1PH
Koyo Sealed Ball Bearing 62122RSC3 GXM 62122RSC3GXM New
NTN Rubber Sealed Roller Ball Bearing 6207LLBC3/L627 6207LLBC3L627 6207LB New
Fafnir Single Row Ball Bearing 216W Made in the USA New
NEW FAFNIR GN104KRRB C1 BEARING W/ COLLAR SN104K
NEW NTN BEARING RACE 4T-3520 3520
NEW NILFISK D50 GREY RUBBER CONE INDUSTRIAL VACUUM ACCESSORY 80650900
FAG Single Row Ball Bearing 6208.2RSR.C3 62082RSRC3 6208.C3 6208C3 New
NEW ZKL BALL BEARING 6002 2RS C3 60022RSC3 6002-2RS
Resun 1" NPT Pipe Plug Valve R1430 w. Handle New
SNR Sealed Roller Ball Bearing 6306 J30 6306J30 New