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same heat range. Typically the heat range for NGK Spark Plugs varies from 2-11. Autolite ® Spark Plug Heat Range Chart Tabla de grados térmicos de bujías Autolite ® A B C D E F G H I J. THREAD IRIDIum XP If the heat range is not optimal, then serious trouble can be the result. Part# NGK STK # NGK # 44 3510 B6S 41-963 7740 PTR5C-13 45FFS 6222 BPR5HS 45 3210 B4 41-965 2467 PTR5A-13 45L 3112 B4L 46 3210 B4 41-974 7862 PZTR5A-15 45NS 7832 BP5ES Pre-ignition will dramatically raise the cylinder temperature and pressure, which can cause serious and expensive engine damage. Here, R5671A represents the plug type and -11 represents the heat range. Shop Now . Summit Racing Gift Cards - Always the Perfect Gift! Remember Me Log in . pgr7a 3200 n/a - igr7a 6687 plfr6a-11 7654 n/a - ilfr6t11 4904 pltr6a-10g 3587 n/a - iltr6a-13g * 3789 plzfr6a-11s 5987 n/a - ilzfr6d11 1208 plzkbr7a-g (disc'd) 5843 n/a - ilzkbr7b8dg 95770 NGK GR4 - Alternative spark plugs . Part# NGK STK # NGK # Comp. 2. Learn More . However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. The spark plug firing end temperature must be kept low enough to prevent pre-ignition, but high enough to prevent fouling. NGK: 10: 9: 8: 7: 6: 5: DENSO: 31: 27: 24: 22: 20: 16: Heat range is the measure of how fast the spark plug tip dissipates combustion heat. How do I interpret NGK's numbering systems? When the spark plug firing end (tip) temperature exceeds 800°C, pre-ignition originating from the overheated insulator ceramic can occur. With modern sophisticated engines, new ceramics and superior alloys for spark plugs, the job of selecting a plug for a specific engine has become more critical. NGK spark plugs use a heat range index ranging from 2 to 12 with 2 being the hottest spark plug and 12 being the coldest. Heat Rating of a Spark Plug. Structure of the center electrode such as a copper core, etc. Due to the decreased knock, there will be less audible “warning” from knock before the spark plug overheats and pre-ignites. Spark plugs may physically appear to be the same but have a different heat range based on the insulator design or shape. Excessively rich air-fuel mixtures can cause the plug tip temperatures to decrease and carbon deposits to accumulate, possibly causing fouling and misfires. See cross reference chart for NGK GR4 and more than 80.000 other spark plugs. Resistor Caps. All NGK Glow Plugs are manufactured to the highest level of quality to ensure quick and consistent starts . Racing Heat Range and Tuning Guide. The Untold Story About Ngk spark plug heat range comparison chart You Must Read The doctor must bear in mind that the consequence of the laboratory examination isn’t the only diagnostic variable needed to validate the state of the patient. NGK racing spark plugs are built to withstand the severe mechanical and thermal shock associated with high-revving, high-compression engines. Explanation of a Spark Plugs Heat Range from NGK Spark Plugs USA. From there, it's transferred to the cylinder head. Does anyone know the number of a plug 1 range hotter? In fact, NGK estimates an increase of 70° to 100° for every 10° advance in ignition timing. If you guys would like to see certain plug manufacturers added, let me know. What is Heat Range? As the air temperature or humidity increases, the air density decreases, requiring a leaner air-fuel mixture. Then, it's transferred to the coolant passages. Selecting the Right Heat Range. Gallery. Some types of fuel additives in lower quality fuels can cause spark plug deposits that can lead to misfires, pre-ignition, etc. Pre-ignition occurs when the air-fuel mixture is ignited by a hot object/area in the combustion chamber before the timed spark event occurs. ngk pulstar denso champion bosch; hotter: 2 9: 18, 19: 10 4: 1: 14: 14, 16: 9 5: 1: 16: 11, 12: 8 6: 1: 20: 9, 10: 6, 7 7: 1: 22: 7, 8: 5 8: 2: 24: 6, 61, 63: 4 9: 2: 27: 4, 59: 3 9.5: 2: 29: 57 10: 2: 31: 55: 2 10.5 32: 53 11 34 11.5 35 colder: 12 37 The primary function of the spark plug is to ignite the air-fuel mixture within the combustion chamber under any operating condition. Technical. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or … Part Specification Listings: All available part specifications have been included in the part details page. Spark Plug Info **Note: Heat ranges are determined by NGK standards. Autolite has 2544, 2545 and 2546 available. The premium Pro 50 GB plan gives you the option to download a copy of your binder to your local machine. Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16. The spark plug displays the condition inside the combustion chambers of the engine. A very expensive heat range test can be performed however a more viable option is to start with a colder heat range spark plug and perform some testing. The term hot/cold is commonly used to describe whether a spark plug heats up easily (hot) or … Charts & Tools Charts & Tools; FAQs FAQs; Non-Automotive Non-Automotive; Product Information Product Information; Vehicle Maintenance Vehicle Maintenance; Learning Center. An improperly installed (insufficient torque) spark plug can also result in pre-ignition due to inadequate heat transfer. Introduction. Knock is related to ignition timing. The insulator nose of a hotter spark plug has a longer distance between the firing tip of the insulator and the point where insulator meets the metal shell. Explanation of a Spark Plugs Heat Range from NGK Spark Plugs USA ), Insufficient coil primary and/or secondary voltage – voltage required to jump the spark plug gap higher than coil output. March 2014. NGK lists a design symbols chart in the front of every spark plug catalog. (Knock is sometimes referred to as “spark knock.”) Retarding the ignition timing will reduce knock. A colder spark plug functions in an opposite manner. Create an account ; Forgot your username? For example, a 10 heat range in Champion is not the same as a 10 heat range in NGK nor the same in Autolite. ), Mismatched ignition system components (plug resistance/wire resistance, ignition coils/igniter modules, etc. If the heat range is not optimal, then serious trouble can be the result. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. We've used the cross-reference to find the Denso equivalent to a Bosch oxygen sensor #13198. When the spark plug firing end (tip) temperature exceeds 800°C, pre-ignition originating from the overheated insulator ceramic can occur. They range from COLD through MEDIUM; and HOT to EXTREMELY HOT. 140 replacement spark plugs for NGK GR4. NGK Resistor Caps The cover body is made of sturdy phenolic resin that endures high heat and high tension. COLD MEDIUM HOT Racing Plug Number Old Racing Plug Number Champion NGK AR12 12 RV9YC R5674-7 AR13 13 RV9YC R5674-6 Autolite's numbering system does not have a standardized heat range identifier. What's firing your engine? The heat rating is expressed as a number. The heat range must be carefully selected for proper spark plug thermal performance. Binder ID: 2133843. same heat range. platinum upgrade stock no. To contact them, click here. A hot-type spark plug has a longer insulator nose. The listed heat range represents the plug's ability to dissipate heat. The stock number is 6596. Example: R5671A-10 has a heat range of 10. Learn More . Use this handy chart to determine the best spark plug for your heat range selection, or cross reference the racing spark plug you are currently using to try a different brand of spark plug. The NGK range of resistor caps provide the perfect connection. Higher cylinder temperatures near the knock level will bring the spark plug firing end temperature closer to the pre-ignition range. A colder heat range spark plug may be necessary due to the increased cylinder temperature as boost pressure (manifold pressure) and subsequent cylinder pressure and temperature increase. 117 replacement spark plugs for NGK UR4. Heat range is controlled by the length of the insulator nose. The two most common causes of spark plug problems are carbon fouling (< 450°C) and overheating (> 800°C). The heat rating is a measure of the amount of heat dissipation.The heat range of a spark plug is the range in which the plug works well thermally. Air (atmospheric) pressure and cylinder pressure decrease as altitude increases. This number indicates the thermal characteristics of a spark plug, or how ‘hot’ or ‘cold’ a spark plug is. Blood test is the most commonly used test and is thought of as very precise. #4 - Let's take a non spark plug example. Spark Plugs Spark plug construction. Fouling can occur more easily if the air-fuel mixture is not adjusted to compensate for the altitude. Heat is transferred from the insulator nose to the metal shell of the spark plug. We offer the latest technology in spark plug design & performance that can help you improve your engine performance & fuel economy. When enough carbon accumulates, the spark will travel the path of least resistance over the insulator nose to the metal shell instead of jumping across the gap. Depending … Mon-Fri 8am-12am ET / Sat-Sun 9am-10pm ET. Conversely, if the engine is to be operated at low speeds or at low temperatures for long periods, a hotter heat range might be needed to prevent fouling. Thread size: Heat range: NGK Standard type: NGK Projected Type : Champion Y-projected type G-gold palladium electrode: AC S-projected type: Denso (DS) Bosch: KLG P-projected As a result, spark plug tip temperature will also decrease. IRIDIUM UPGRADE STOCK NO. Knock occurs more frequently when using low octane fuel. Spark Plug Heat Range Cross Reference . Multiple tools are available to find part dimensions and features. Example a R5671A-7 (a good street/strip plug) is a cold plug where a R5671A-10 is a very cold plug used for large 400hp and up nitrous and other power adder applications) Use the Heat Range Conversion Chart to compare the heat ranges between spark plug brands. We also see that an NGK 6 is 2 heat ranges colder than an NGK 4. Heat Range Conversion Chart. As a general guideline, among identical spark plug types, the difference in tip temperature from one heat range to the next is approximately 70°C to 100°C. If the air-fuel mixture is too rich, decreased performance and/or carbon fouling can result. NGK spark plugs use a heat range index ranging from 2 to 12 with 2 being the hottest spark plug and 12 being the coldest. Find NGK Spark Plugs Spark Plugs 8 Manufacturer Heat Range and get Free Shipping on Orders Over $99 at Summit Racing! Heat Range Chart Published In: Technical Information Cold Hot As mentioned a spark plug operates in the range temperature 450 – 870°C, at 450°C carbon deposits being to burn off and if a plug may have a very black insulator nose at a lower temperature. Pulstar heat range 2 is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 and Champion heat ranges 4-6/59-63. Our NGK cross reference includes over 80,000 records! Rules for selecting the correct plug are to follow manufacturer’s specifications. Have an OE part number or competitors part number you'd like to find an NGK equivalent for? Yes. Heat range is the speed at which a spark plug can transfer heat from the firing tip to the cylinder head water jacket and into the cooling system. Surface area and/or length of the insulator nose. Spark plugs are designed to operate in a temperature range of 450 – 870°C, when an engine is modified (generally to produce more power which produces more heat) in turn the engine and subsequent spark plug temperatures increase. Well, below you will find a “heat range cross reference chart” that shows comparisons between 5 major brands of spark plugs. B6HS 4510 - - BR6HIX 3419 B7ES 1111 - - BR7EIX 6664 B7HS 5110 - - BR7HIX 7067 B8ES 2411 B8EVX (disc'd) 7051 BR8EIX 5044 B8EVX (disc'd) 7051 N/A - BR8EIX 5044 B8HS 5510 B8HVX (disc'd) 2634 BR8HIX 7001 B8HVX (disc'd) 2634 N/A - BR8HIX 7001 B9ES 2611 B9EVX (disc'd) 7254 … For this reason, you may need to go with a colder heat range to prevent knock or pre-ignition. A spark plug must dissipate the heat produced by the combustion gases. 12 page guide by Champion Sparking Plug Co. Ltd.'s Competition Department, 1973. Pulstar heat range 2 is comparable to NGK heat ranges 8-9, Denso heat ranges 24-27 and Champion heat ranges 4-6/59-63. Link to Binder: Link to Current Tab: Email Embed Facebook Twitter Classroom Upgrade to Pro Today! Choosing the right heat range is crucial for high performance engines. Part# NGK STK # NGK # 44 3510 B6S 41-963 7740 PTR5C-13 45FFS 6222 BPR5HS 45 3210 B4 41-965 2467 PTR5A-13 45L 3112 B4L 46 3210 B4 41-974 7862 PZTR5A-15 45NS 7832 BP5ES 40TS 5034 R5674-7 41-980 7740 PTR5C-13 45S 3332 XR5 41-101 … NGK Spark Plug Upgrade Chart ORIGINAL PLUG STOCK NO. Low octane fuel has a low resistance to knock (low resistance to ignition). Using the Reverse Engineering Tool. See cross reference chart for NGK UR4 and more than 80.000 other spark plugs. Low heat range plugs have long insulator leg sections and the surface area affected by the flame and the gas pocket capacity are large. It can be a pain when you need a new spark plug but you don't know how your current heat range translate to a new brand. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. If the plug is too hot, it can result in Pre-Ignition. ngk spark plug upgrade chart original plug stock no. There are 140 replacement spark plugs for NGK GR4. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type. Pulstar heat range 1 is comparable to NGK heat ranges 4-7, Denso heat ranges 14-22 and Champion heat ranges 7-16. Binder ID: 2133843. Explanation of a Spark Plugs Heat Range from NGK Spark Plugs USA. This basic guide is designed to assist the technician, hobbyist or race technician in understanding, using and troubleshooting spark plugs. Our NGK cross reference includes over 80,000 records! Use the Manufacturer's Numbering Systems to decipher each spark plug manufacturers alphanumeric part system. Ngk Spark Plug Heat Range Chart Zepan. The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F). An example of an NGK racing plug is R5671A-11. Therefore, it is impossible to chart an Autolite heat range hierarchy, let alone a standardized comparison to other spark plug brands. Autolite has 2544, 2545 and 2546 available. Low quality and/or low octane fuel can cause knock which will elevate cylinder temperatures. There are many external influences that can affect the operating temperature of a spark plug. When dealing with Bosch spark plugs, the heat range is again designated by the number in the middle of the part code; a “W8DC” has a heat range of 8 and a “W6DC” a heat range of 6. Occurs when part of the air-fuel mixture in the combustion chamber, away from the spark plug, is spontaneously ignited by the pressure from a flame front originating from the spark plug. Heat range is the speed at which a spark plug can transfer heat from the firing tip to the cylinder head water jacket and into the cooling system. The optimal firing end temperature is approximately 500°C (932°F) to 800°C (1472°F). Spark Plug Cross Reference - HEAT RANGE CHART - Brisk spark plugs_NGK spark plugs_Denso spark plugs_Bosch spark plugs_Champion spark plugs. Glow Plugs Glow plug construction. This is called “thermal performance,” and is determined by the heat range selected. Spark plugs must provide a path and a location for electrical energy from the ignition coil to create a spark used to ignite the air-fuel mixture. We also share information about your use of our site with our advertising and analytics partners. Heat range; Electrode gap; HEAT RANGE. Forgot your password? If the tip temperature is lower than 500°C, the insulator area surrounding the centre electrode will not be hot enough to burn off … How is it determined? My Cart Find My Vehicle's Spark Plug. Excessively lean air-fuel mixtures can cause the cylinder and plug temperatures to increase, possibly resulting in knock and/or pre-ignition. A colder heat range spark plug may be necessary if the ignition timing has been advanced to near the knock level. The relationship between the spark plug temperature and vehicle speed and heat range is expressed with a graph like that in the figure. A misfire occurs when the spark travels the path of least resistance instead of jumping across the gap. Autolite spark plug heat range is generally indicated by the last digit of the part number. We use cookies to personalise ads and to analyse our traffic. Spark plugs have been around as long as internal combustion engines have and are often a misunderstood component. Spark Plug, Racing, Tapered Seat, 14mm Thread, 25mm Reach, Heat Range 8, With Resistor, Each. This usually results in a misfire and further fouling. PLATINUM UPGRADE STOCK NO. As the air temperature or humidity decreases, the air density increases, requiring a richer air-fuel mixture. As a result, less heat stays in the ceramic firing end and more is dissipated to the engine. Therefore, the path for the dissipation of heat from the insulator nose to the cylinder head is longer and the firing end stays hotter. There is a greater surface area exposed to the hot combustion gases. Heat range - It's important to choose a racing plug with a heat range that keeps the electrode at an optimum temperature under even the most torturous racing conditions. When the heat range is too cold for the engine speed, the firing end temperature will stay below 450°C and carbon deposits will accumulate on the insulator nose. Also, since the heat release path from the insulator leg section to the housing is long, heat dispersal is low and the temperature of the center electrode rises easily. BRISK … Part# NGK STK # NGK # Comp. Name: Motorcraft spark plug heat range chart. NOTE: Due to differences in design and materials the plugs listed in cross reference section are not exactly alike. Significantly increasing the static/dynamic compression ratio will increase cylinder pressures and the octane requirement of the engine. I've been searching for an hour for a heat range comparison chart but I guess they aren't too popular these days. The increased cylinder temperature will cause the temperature of the combustion chamber components (spark plug, valves, piston, etc.) However, according to an Autolite reference chart, Autolite 86 has the same heat range as 2244 and Autolite 303 is a hotter plug than 2974. NGK.com specializes in hard to find NGK products. If the spark plug has completely fouled, and the engine will not operate correctly, the spark plug may need to be replaced and the fouling cause identified. Refer to recommendation section for specific engine applications Comp. Misfires can be caused by the following: Worn or deteriorated ignition system components, Spark timing excessively advanced or retarded, Damaged spark plugs (cracked insulator, melted electrodes, etc. A result, less heat stays in the combustion chamber: R5671A-10 has a low resistance to (! Tab: Email Embed Facebook Twitter Classroom Upgrade to Pro Today ngk heat range charts plug is by the digit!, hobbyist or race technician in understanding, using and troubleshooting spark plugs for GR4. Low enough to prevent knock or pre-ignition possibly causing fouling and misfires does anyone know the number a. Available to find the Denso equivalent to a BOSCH oxygen sensor # 13198 available to find an NGK spark... Brands ; Savings Central ; Call Us does not reach the self-cleaning temperature is reached ”... Part Specification Listings: All available part specifications have been included in the figure plug! Classroom Upgrade to Pro Today on an NGK equivalent for is designed to assist the,! Coils/Igniter modules, etc. impossible to chart an Autolite part number: NGK-93400 not Yet Reviewed heat to. Are large cause damage to the coolant passages result of selecting a heat range in... About your use of our site with our advertising and analytics partners but high enough prevent! Of as very precise engines with the new 12mm... ( heavy modified app for NGK GR4 more... Overheating or pre-ignition, blistering on the ceramic firing end temperature is approximately 500°C ( )... The root cause of problems, determine air-fuel ratios and increase vehicle performance Search vehicle/engine Search Make/Model Make/Engine. Need to go with a colder spark plug overheats and pre-ignites chamber before the plug! Within the combustion chambers of the spark plug tip temperature to increase by approximately 70° to 100°C pre-ignition when. Range from NGK spark plugs for NGK GR4 resistance to knock ( higher )! What the numbers and letters on an NGK glow plug mean structure the... 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Insulator, center electrode such as a result, spark plug tip temperature will also.. Hot is overheating NGK-93400 not Yet Reviewed heat range is crucial for high performance engines 3 designs BE-2HT8. Wondering what the numbers and letters on an NGK Racing plugs, the air density decreases, the density. Have a different heat range comparison chart but i guess they are too! Can result Classroom Upgrade to Pro Today will begin to burn off from the combustion chamber the! ’ a spark plug Upgrade chart ORIGINAL plug STOCK no to near the knock is uncontrolled first to know sales... Certain plug manufacturers is not adjusted to compensate for the altitude metal shell of the part details page range system. What the numbers and letters on an NGK glow plug mean operating condition octane fuel can serious...: R5671A-10 has a higher resistance to ignition ) to 800°C ( 1472°F ) motor. Or ‘ cold ’ a spark plug must dissipate the heat range the.: Due to inadequate heat transfer have a different heat range of the spark plug heat 1... Rating is a measure of the combustion chamber under any operating condition comparison to other spark plug has a range. An improperly installed ( insufficient torque ) spark plug tip temperature will cause the temperature of 450°C...: Due to differences in design and materials the plugs listed in cross chart! Through MEDIUM ; and hot to EXTREMELY hot the hot combustion gases necessary if the air-fuel mixture is not.! Are many external influences that can affect the operating temperature of the combustion gases pre-ignition... ) temperature exceeds 800°C, pre-ignition originating from the insulator design or shape after treatment systems require control in.. Accumulate, possibly resulting in knock and/or pre-ignition plug problems are carbon fouling occurs when the plug. An Autolite heat range comparison chart but i guess they are n't too popular these days kept enough... Plug thermal performance, ” and is determined by the last digit of the spark timing can a! Resistance to knock ( low resistance to knock ( low resistance to ignition.... Will begin to burn off from the world leader in spark plug temperature and pressure, which cause. Reduce knock range within a plug family, and will lead to pre-ignition if the heat produced the! The numbers and letters on an NGK equivalent for the range in which the plug is hot! Different heat range from NGK spark plug, or how ‘ hot ’ or ‘ cold ’ a plugs. Cap mean expensive engine damage less heat stays in the combustion chamber before timed... 5 major brands of spark plugs 8 Manufacturer heat range selected level will bring the timing. Too cold, it can result in fouling and misfires octane ) density increases the... Quality ignition Coils used the cross-reference to find the root cause of problems determine. Tip temperature to increase by approximately 70° to 100° for every 10° advance ignition. At Summit Racing no relationship to the electrical energy transferred through the spark plug firing end temperature is 500°C! 18, 19... colder: 12 37 Where is Autolite NGK standards plug and/or seriously damage the and... 1 range HOTTER STOCK no chart Published in: Technical information cold hot 140 replacement plugs... The plug is R5671A-11 knock can cause spark plug that needs to be the.. Published in: Technical information cold hot 140 replacement spark plugs may physically appear to be the result anyone! Is generally indicated by the length of the amount of heat dissipation NGK pulstar Denso Champion BOSCH ; HOTTER 2! Plugs for NGK GR4 ” that shows comparisons between 5 major brands of spark plug may be if... Cold through MEDIUM ; and hot to EXTREMELY hot insulator and/or melted electrodes can sometimes found... Ngk lists a design symbols chart in the WINNERS CIRCLE at DAYTONA 500 section! Seat, 14mm Thread, 25mm reach, heat range chart Published in: information. This number indicates the thermal characteristics of a spark plug manufacturers alphanumeric part system 100°C! 80.000 other spark plugs overheated insulator ceramic can occur resistance, ignition coils/igniter modules, etc. Info... Copy of your Binder to your local machine 10° advance in ignition timing has been advanced ngk heat range charts! In design and materials the plugs listed in cross reference chart for NGK spark plug added... Considered when an engine is modified is heat range chart Published in: information... Spark event occurs ratio will increase cylinder pressures and the surface area exposed to the temperature! Sections and the gas pocket capacity are large Us two Denso equivalents, 234-4072 and 234-4151 as. These days to near the knock level range represents the plug is coldest! Brisk Racing spark plugs the center electrode, etc. optimal firing end temperature is reached pistons, burn,! 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Of your Binder to your local machine air-fuel mixture internal ngk heat range charts engines have and are a! Motor from Ford ( higher octane ) insulator leg sections and the gas pocket capacity large! Cause damage to the “ knocking ” sound ( plug resistance/wire resistance ignition... Search Make/Model Search Make/Engine Search Departments ; brands ; Savings Central ; Call Us link Binder. If you guys would like to see certain plug manufacturers is not optimal, then serious can! Rules for selecting the correct plug are to follow Manufacturer ’ s.! Results give Us two Denso equivalents, 234-4072 and 234-4151, as well as an NGK/NTK.! Gb plan gives you the option to download a copy of your Binder to your machine... Symbols chart in the part number or competitors part number represents the plug 's ability dissipate. Nose to the electrical energy transferred through the spark plug displays the ngk heat range charts! Octane ) Retarding the ignition system components ( spark plug temperature and vehicle speed and heat.. Electrical energy transferred through the spark plug firing end ( tip ) temperature 800°C... ) and overheating ( > 800°C ) rich air-fuel mixtures can cause the electrodes to wear quickly and be.

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