Roller chain length formula First English-language edition, 1997 ISBN 0-9658932-0-0 Library of Congress 97-061464 To answer this question, let's do a quick refresher on the ANSI part numbering system. Tsubaki, Inc. Website Maintenance by Parker Web Machine Design Engineering Bearings Design and Engineering. ii The Complete Guide to Chain © 1997 by U. count the outer plates (#) marked in red 2. 9 Speed of the chain / max: v The roller chain size chart below offers comprehensive dimensions and specifications for each single-strand standard ANSI chain size. What is a 120 roller chain? #120 roller chain is a type of roller chain with a pitch of 1. . 9 Speed of the chain / max. ANSI 160 Roller Chain 160 roller chain is a 2" pitch transmission roller chain that dimensionally conforms with ANSI B29. How do I know what size roller chain I need? Determine the roller chain size by measuring the pitch (distance between pins) and finding the corresponding chain size in a roller chain size chart. 35; f1 = Down chain friction factor – 0. I can use the The number of chain links that are needed for the modification will be displayed in the Chain Links box. When changing sprockets, you can adjust Chain Links to maintain (nearest to) current Sprocket Centers (eg: to keep motorcycle rear wheel within adjustment range). Explore now! Selection of Roller Chain a way to satisfy the following formula: T×f1×f3≦Max. 8 = 40. Whether you're seeking a replacement or determining the appropriate size for your equipment design, this chart streamlines the process, allowing you to seamlessly match your measurements with the provided dimensions for accurate chain identification. The length L in pitches should be an even number for a roller chain, so that the use of an offset connecting link will not be necessary. e. When the chain length is 100 pitches and the above conditions are met, a service life of approximately 15,000 hours can be expected. By partnering with our skilled team at PEER Chain, you’re sure to find the perfect roller chain, sprocket or conveyor chain sprocket for your specific needs. Bush roller chain. The calculator will determine your required roller chain length and ideal centre distance, given the sprocket teeth, chain pitch and centre distance. The disc picks up oil from the sump and deposits it onto the chain, usually by means of Determine Chain Length . 25 inches. 12 Chain type 1. LP＝ N₁＋N₂ 2 ＋2CP＋ ｛（N₂−N₁）／2π｝² CP LP: Overall roller chain length (no. 59 1750 25-3 1/8 . 1-2011 - Precision Power Transmission Roller Chains, Attachments, and Sprockets Mar 5, 2024 · Apply the center distance formula (assuming both sprockets have the same number of links wrapped around them): C = L / (2 * (n + 1)) Note: This formula assumes full engagement of the chain on both sprockets. Also check that the speed is less than 160 ft. , the L is . If your centre distance is too short, a minimum will be calculated. Calculating Roller Chain Length Given two sprockets, a known distance apart. In case you wish to enter your own number of links of the chain, disable the check mark box and enter your own number in the cell on the left. com. 13 Axis distance for Automatic 2. The lower the chain revolutions, the more frequently each chain link engages the same sprocket tooth, so greater and more uneven the wear. Here a picture of a typical sprocket. The roller diameter (D r) is approximately 5/8 x pitch (P). Step 9: Calculate the Chain Length. 35 2. Ramsey Products Corporation 135 Performance Drive Belmont, NC 28012 Tel: (704) 394-0322 Fax: (704) 394-9134 sales@ramseychain. 3 2. Sprockets for roller chains are designed to accept up to 3% (1. This formula is approximate, but the error is less than the variation in the length of the best chains. The rollers are free to rotate on the bush which protect the sprocket wheel teeth against wear. Chain Links. 306 5/16 * This refers to the bushing diameter since the chain pitch is small and roller-less. 130* 0. +1. 1 standard roller chains Simplex Roller Chains British Standard Precision Roller Chain Conforming to ISO 606 and DIN 8187 14 Cat No. 0 1. Number of chain pitches: L . 3 Shortening and lengthening the chain 51 Page D General information for chain drives 52 1 Drive arrangement 52 2 Chain alignment 53 3 Chain tension 53 - chain roller chain lengths pitches converted to feet no. 88 . Chain Length in Pitches = [(N + n)/2] + (2C) + (K/C) To determine “K”, subtract the number of teeth on the small sprocket from the number of teeth on the large sprocket. d 1 max. The formula to calculate chain length is as follows: \[ CL = 2 \times C + \left( \frac{F}{4} + \frac{R}{4} + 1 \right) \] where: CL is the chain length in inches, C is the chain stay length in inches, F is the number of teeth in the front chainring, R is the number of teeth in the rear cog. CHAIN LENGTH CALCULATION SPEED RATIOS SPROCKET DIAMETERS HORSEPOWER RATINGS SPROCKETS American sprocket manufacturers have adopted 4 specific types of sprocket Setting out the right amount of anchor chain is an important part of getting a good night’s sleep on your boat. 356 . Results show that the total chain wrapping length varies periodically with the tooth frequency. 8 mm = 600 ÷ 14. The roller chains are normally most affected by chain joint wear and sprocket wear. 0 – – – 2. STEP 2 Locate the corresponding step on the gauge. Chain Tension: T . Our superior selection of 160 roller chains includes single-strand through six-strand widths, riveted or cottered configurations, problem-solving solutions, and more! 160 chain has been in use since the 1930s and has played an essential role in the revolution of of sprocket teeth N1,and N2 as the chain length Lp are available) The pitch number obtained by the chain length formula is, in most cases, only approximate and not in exact agreement with a given inter-shaft distance. Basic Formula for Selecting Drive Chain . A sprocket is a toothed wheel upon which a chain rides, contrary to popular opinion, a sprocket is not a gear. The cell gives the actual length of the chain. Allowable Load Min. That means that an ANSI 120 chain, for example, has a pitch of 12/8s of an inch or 1. 3. Pin Trans- Plate verse Pitch P W D JIS DID DID DID Min. Determines all other dimensions Chain width- 5/8 of the pitch Roller diameter- 5/8 of the pitch Pin diameter- 5/16 of the pitch Link plate thickness- 1/8 of the pitch 2 1-800 US CHAIN (872-4246) | diamondchain. The pins, bushes and rollers are made of alloy steel. For the analysis of roller chain drive dynamics we present a novel model of a chain Supplements: Roller chain dimensions table; Horsepower ratings ansi roller chain no 25 table; Reference: ASME B29. Here is an example of the process required to calculate chain length given a center distance and the sprocket teeth numbers. The ˜rst digit(s) in each standard roller chain part number tells us the pitch of a chain in eighths of an inch. Note that an offset link will be required when the chain length is an odd number; however, the tooth numbers and inter-shaft distance should be adjusted whenever possible to ensure that calculation produces an even number. d 2 max. How to Use the Chain Length Calculator Dec 31, 2020 · Needed length of roller chainUsing the center distance in between the sprocket shafts as well as amount of teeth of the two sprockets, the chain length (pitch amount) is often obtained through the following formula:Lp＝（N1 ＋ N2）/2＋ 2Cp＋｛（ N2－N1 ）／2π｝2Lp : Overall length of chain (Pitch number)N1 : Number of teeth of small sprocketN2 : […] Calculation of chain length X With the same number of teeth z1 = z2 the chain length is: With different numbers of teeth z1 and z2 the chain length is: a 0 X 0 z 1 z 2 X 0 =2 a p 0 +z X 0 =2 a p + z+z 2 + Cp a o 12 0 X = Chain length in links X0 = Theoretical chain length a = Shaft distance in mm a0 = Theoretical shaft distance p = Pitch in mm EZ CHAIN WEAR GAUGE® Check the life of your chain STEP 1 Indentify chain pitch size. 25 in: 10T: 0. Roller chain drives 1. 130 . Drive Alignment Misalignment results in uneven loading across the width of the chain and may cause roller linkplate and sprocket tooth wear. Wash chain in kerosene when required and then re-lubricate. Eq. 809" NEO/CIM (8mm) Select a chain with the smallest pitch that has the required kW ratings. Solve for C: Required Roller Chain Length The required roller chain length (number of pitches) can be determined by the following equation, using center-to-center distance between shafts and number of teeth of sprocket. To determine the horsepower requirements for Roller Chains the following must be taken into consideration: Service factors, Lubrication Service Factors, Chain Length Formula. Weight (lbs/FT) Note: 1. Aug 24, 2023 · The formula is often: Chain Length = (Chainstay Length + Large Chainring Teeth + Large Cassette Cog Teeth) / 2 + 1 or 2 extra links for flexibility. 5. (Perform with chain in tension. Matching COTS Sprockets; Vendor Pitch Teeth PD Bore; REV: 0. 1 Standards. 56 . Compute the length of chain required using the formula given below. 0 2. Temperature Standard Roller Chain Stainless Roller Chain 300 Series Stainless-5 to 170˚C 170 to 200˚C 200 to 250˚C 250 to 325˚C 325 to 425˚C 425 to 500˚C 1. The pitch of the chain is also known. Roller Chain Calculation Basics; Geometry Design Properties of Roller Chains; Calculating Roller Chain Length; Calculating Roller Chain Strength Proportions dimensions in the BS series of chain as the equivalent hollow pin chain, i. 200 . Learn to calculate chain length, links, and determine lock types effortlessly. multiply the (#) outer plates x 2 3. 42 then round it up to 128 and purchase a 128 link chain. The oil level should reach the pitch line of the chain at its lowest point while operating. Chain on equipment should be measured on the tension side. mm Pin Dia. ) Calculate the remaining values using the formulas on the preceding page. of pitches chain pitch - inches 1/4 3/8 1/2 5/8 3/4 1 1 1/4 1 1/2 1 3/4 2 2 1/2 Apr 18, 2007 · I have a chain and need to know how strong it is. 2. If site restrictions require a short distance between shafts and the smallest possible sprocket outer diameter, use a multi-strand roller chain with a small pitch. This understanding is vital for anyone involved in rigging, construction, or heavy lifting, helping to prevent accidents and equipment failure. 322 in. 25 ~ 0. Aug 15, 2023 · The formula for chain length is often given by: Chain Length = (Number of Pitches) + (Number of Links) + (Number of Inner Links). ) Determine the values for P, N and Dr for a 30T sprocket 2. Chain Wear Factors Two important factors, resistance to wear and resistance to fatigue, should be considered when determining chain size and quality. best chains. 10 ~ 0. Chain wheel with identical numbers of teeth z 1 = z 2. For those with a machinary handbook the W is . The chain length L found using the formula presented here should be rounded off to an integer. f = Upper chain friction factor – 0. Example Calculation In the PEER Chain Technical Center, wear life, fatigue, tensile strength, chain length and hardness are just a few of the tests conducted to achieve maximum chain performance. Click "compute" to find out the required number of chain links. L = 2 × 16. 2 4. If a single-strand chain does not have sufficient power, select a multi-strand chain. 3 Determining length of chain 40 3. The pitch diameter for each roller chain drive sprocket or idler is obtained from equations below. Pitch Roller Link Width Roller Dia. The length of the driving chain is normally required in numbers of double pitches because a complete link includes the inner and the outer link which covers two pitches. RC 160 Standard Roller Chain Dimensions Unit (inch) DID d E G L e g C T H h Chain No. p is the pitch of the chain May 25, 2018 · Admissions started for Engineering ***Diploma & Degree***(All Branches)Contact us on 7666456011Free Engineering Video Lectures on YouTube👍👍👍For More Vi Roller Chain Dimensions ANSI Number Roller Width Roller Dia . 0 Z = No. Fig. /min. 200* 0. multiply this result by the pitch (p) in mm 5. 4567 | My Account Nov 22, 2020 · A pin passes through the bush which is secured in the holes of the roller between the two sides of the chain. 34 875 25-2 1/8 . ) STEP 4 If the gauge step fits through the checkpoint, the chain is worn out and needs to be replaced. Generally, these two factors dictate roller chain life If the check mark box is enabled, this value is used for the calculation. Center distance in pitches: C . 1 Number of links and centre distance 40 - chain drive with two shafts - chain drive with several shafts 3. Note that “C” is in chain pitches, thus: C = Center Distance (inches)/Chain Pitch (inches) The required Wear is important in designing roller chain drives. The chain drive trajectory is based on individual sprocket position and desired direction of motion. The length of a Step 9: Calculate the Chain Length. I just don’t know how to check without loading 100+pounds onto it. 800. applications section 1. a. 5 (segments) Weight of each segment = What is the calculation formula for the tensile force Chain Links. † Pitch P Inside Width b min mm Roller Dia. Input the new counts for both the front and rear sprocket teeth. 15; By using the formula S = w * l² / (8 * T), users can easily determine how much sag will occur based on the weight of the chain, its length, and the tension applied. 375 + 42 / 4 + 32 / 4 + 1. 50 2100 35-2 3/16 . A bush roller chain is extremely strong and simple in The chain length is given by number of chain links and the chain pitch. when chain length is 100 pitches and the above Easily identify roller chain stretch with this roller chain stretch chart! Then, find replacement high-quality roller chain to maximize your chain life. 2 Measuring the chain length 44 - tables 3. 3 Roller Chain Dimensions Table. d) Chain length 120 links (for shorter chains the chain life decreases proportionally) e) Speed reducing ratio from 1:3 up to 3:1 f) 15000 h expected wear life; 15000 operating hours only with a maximum of 3 % elongation caused by wear Chain Drive Length And Centre Distance Calculation The chain load-bearing calculation formula is as follows: Lifting chain meter weight calculation formula? Answer: The basic formula is number of segments = total length (mm) ÷ 14. Add the newly computed center distance. 75 2. 4. Roller Chain is a series of alternately assembled roller links and pin links in which the pins articulate inside the bushings and the rollers are free to turn on the bushings. I tried several handbooks and none of them had the right size. L = 2 (C) + (F/4 + R/4 + 1) L = Length – your chain length in inches (rounded to the nearest inch). The measurement should contain equal number of roller links and pin links. add 1 4. 90 4200 Jul 24, 2024 · Apply these values to the bicycle chain length formula. From forestry to machinery applications, our fantastic products and attentive professionals will keep all of your projects running smoothly. Add these four numbers up and you have the theoretical length of the chain. (2) For disc lubrication, the chain operates above the oil level. Maximum Roller Diameter Minimum Ultimate Tensile Strength Measuring Load; 25: 0 Demanded length of roller chain Applying the center distance between the sprocket shafts as well as quantity of teeth of each sprockets, the chain length (pitch quantity) may be obtained through the following formula: Lp＝（N1 ＋ N2）/2＋ 2Cp＋｛（ N2－N1 ）／2π｝2 Lp : Total length of chain (Pitch quantity) Chain Length Calculator: Re-enter the chain pitch value. Procedures for Selecting Roller Chain 1) The following factors must be considered when selecting roller chain. 8 Length of the chain. RB Racing's chain length calculator calclates the number of links your chain needs The chain length can be calculated using the formula: Chain Length = (Pitch x Number of Teeth on Large Sprocket) + (Pitch x Number of Teeth on Small Sprocket) + (2 x Center Distance) The center distance is the distance between the shaft centers of the drive sprockets. Remember, if the result is an odd number, add 1 link for proper fitting. 75 – – 2. Important Reminder: Power Transmitted by Roller Chain formula is defined as the measure of the power transmitted through a roller chain, which is a critical component in mechanical power transmission systems, providing a reliable and efficient means of transferring power between two or more rotating shafts and is represented as P c = P 1 *v or Power Transmitted by Chain Drive = Allowable Tension in Chain*Average Dec 10, 2024 · Unlock precision in sprocket-driven conveyor assembly with our guide. This is the hanging length. of links) Generally, when the chain length number of chain links obtained is an odd number, this should be raised to the next even number. Chain Length . ," in the above formula includes chain and the parts moving with the chain, such as attachments and slats. Anyone that knows anything of help please let me know. 7. Necessary length of roller chainApplying the center distance amongst the sprocket shafts along with the quantity of teeth of the two sprockets, the chain length (pitch amount) may be obtained from your following formula:Lp＝（N1 ＋ N2）/2＋ 2Cp＋｛（ N2－N1 ）／2π｝2Lp : Overall length of chain (Pitch number)N1 : Number of teeth of little sprocketN2 : Quantity […] (1) For bath lubrication, the lower strand of chain runs through a sump of oil in the drive housing. The formula to calculate chain length is: CL = 2 × C + (F / 4 + R / 4 + 1) Where: CL = Chain Length (inches) C = Chainstay Length (inches) F = Front Chainring Teeth; R = Rear Cog Teeth; This formula is widely used in the cycling community to estimate the required chain length for a specific setup. 8 Length of the chain: L [mm] 2. 63 . Our calculator streamlines the process, ensuring optimal roller conveyor performance. The number of teeth on each sprocket is known. Our goal is to meet (and exceed) customer expectations! Pitch- distance between pin centres. Engineering Data HB-828 - 12/03 Engineering Data - 3 Effective Conveying Widths for C557 Single Strand Chain Driven Live Roller Curve: Product Length - Straight Conveyor Shafting, bearings, and foundations should be supported rigidly to maintain the initial alignment. Our chain length becomes 52. For optimum life of the chain and sprockets the centre distance between the two sprockets should be 30 to 50 times the chain pitch. The algorithm to compute chain length uses sprockets pitch diameters. You need to factor in a bit of chain slack and you need to round it (down) to the nearest whole number of links. 96 . Measurement is outside of pin to outside of pin. 523. how to Determine The hanging length of a cord or bead chain loop Measure how far the loop hangs down when it is installed on the shade and not broken. 2 Foot 3 Foot 4 Foot Calculate chain length and links. chain, the “Multiple Strand Factor” given in Table II must be used. Enter the data in the table below. The chain width (W) is the distance between roller link plates and Topics in this section. or less, chain elongation due (1) Calculating the chain length (when the number of sprocket teeth N1 and N2 and the distance between shaft centers Cp are available) N1 N2 Lp(No. 4- Chains can be cut in even numbers only so round up the Chain Links number to the nearest even number. 80 4. mm Con Pin Ext. Tensile Strength lbs lbs lbs lbs Approx. 00 1. Chain not on equipment requires the Aug 15, 2023 · The formula for calculating chain length is: Chain Length = (Pitch x Number of Links) + ((Number of Links – 1) x Roller Diameter) How long is a 120 link motorcycle chain? A 120-link motorcycle chain typically measures around 60 inches in length. Tensile Strength Max. Note that “C” is in chain pitches, thus: C = Center Distance (inches)/Chain Pitch (inches) The required Chain length, in pitches, is given by. Remember, you can only join the inner plates to the outer plates of a chain, so you can only calculate to whole inch increments. 0 5. Deep Link Chain Hollow and solid pin chain has an optional side plate design known as deep link. Using the basic formula: Chain Length = 2 × 17 + (40/4 + 28/4 + 1) Chain Length = 34 + (10 + 7 + 1) Chain Length = 52 inches Wear is important in designing roller chain drives. 5% for double pitch chains) chain elongation from wear. If the chain wraps around a different number of teeth on each sprocket, a more complex formula might be needed. of pitches) a) a chain drive with two sprockets on parallel horizontal shafts; b) a small sprocket with 19 teeth; c) a simplex chain without cranked link; d) a chain length of 120 pitches (different chain lengths will affect chain life); e) a speed ratio of from 1:3 to 3:1; f) an expected life of 15 000 h; Chain Number 25 35 41 40 Pitch ¼ 3/8 ½ ½ Max Roller Diameter 0. 100 . Roller chain should be free of grit and dirt. , The P is1. com Dedicated To Producing The Worlds Best Roller Chain Since its founding in 1890, the Diamond Chain Company has been singularly focused on producing the best roller chain. 237 . 37 . It is known for its high NOTE: "chain, etc. 735 in. Calculate sprocket center distance and ratio. It’s why the Wright Brothers chose Diamond Chain for their lying machine, why Henry Ford chose Diamond given number of links. When the inter-shaft distance May 24, 2024 · Double-Pitch Roller Chain: As the terminology indicates, the pitch of double-pitch roller chain is doubled while other key chain dimensions are mainly the same as single-pitch roller chain dimensions. These results are of practical importance to both the design, installation and operation of roller chain drives. I do not know wwhere to begin with this problem. 6 2. Tensile Strength Avg. 9 3. Are all 10 speed chains the same size? Yes, most 10-speed chains are similar in size, but there might be slight variations between manufacturers. Determining the length of a chain: The chain length is given by the number of chain links and chain pitch. L1 = Conveyor horizontal direct length – (m) (ft); L2 = Conveyor slope (inclined / declined) extension direct length – (m) (ft); Pch = Total chain weight (see manufacturers tables according to chain types); N = Driving power (kW) - (HP). Length of Driving Chain. This page calculates the length of the chain required to wrap both sprockets, and the number of links of chain to do so. transmission chains. allowable chain load. Therefore, if the coefficient of friction is high, the tension increases and larger chain is required. Teeth in Sprocket or Pulley p = Belt/Chain pitch mm Further design formulae and conversion tables are Fortunately, there is an easy way to determine the correct length: 1. Ramsey Products - USA. For example if the Chain Links result is 127. Maximum Roller Diameter Minimum Ultimate Tensile Strength Measuring Load; 25: 0 May 26, 2024 · Advanced Formula: Adjusted Chain Length = 2 × Chainstay + Total Teeth/4 + Adjustment. Elevate your expertise and efficiency in material handling. Center Distance. Driven The formula for determining the correct chain length is as follows: Chain Length = (Center Distance / Pitch) + ((Teeth on Driver Sprocket – Teeth on Driven Sprocket) / 2) + 2 Ensure all measurements are in the same unit of measurement, typically inches or millimeters, for accurate results. Source of power b. Chain Speed: S . 84 2626 35 3/16 . Horsepower Ratings for ANSI Roller Chains Table For 1 - 1/4 " Pitch Standard Single Strand Roller Chain No. If possible, adjust the centre distance, so that the length of chain required is always in an even number of pitches. Roller chain and sprocket The sketch of roller chain, Leonardo da Vinci, Codex Atlanticus. Chain joint wear causes roller chains get longer. Calculation Example: Let’s say your bike has a 17-inch chainstay, a 40-tooth front chainring, and a 28-tooth rear cog. of links) Cp(No. STEP 3 Check gauge for fit between any two roller links. divide by 1000 This gives us the following formula: (((# outer plates x 2) + 1) x p) / 1000 The result is the chain length, expressed in Aug 24, 2023 · What is the difference between standard roller chain and heavy series roller chain? Heavy series chains have larger components, providing higher strength and load capacity compared to standard chains of the same pitch. mm Plate Depth g mm Pin Length l 1 max. The chain length is given by number of chain links and the chain pitch. 85 1. Roller chain or bush roller chain is the type of chain drive most commonly used for transmission of mechanical power on many kinds of domestic, industrial and agricultural machinery, including conveyors, wire- and tube-drawing machines, printing presses, cars, motorcycles, and bicycles. Chain length is a function of the number of teeth of the drive and driven sprockets as well as the center-to-center distance. Larger Chain. Inside Link Plate Height Cottered Chain Width* Riveted Chain Width* Average Tensile Strength Standard Series Chain 25 1/8 . In this formula, a coefficient of friction is multiplied by every term in the equation. 1. . pitch, inside width and roller diameter, is more robust with a higher breaking load and is recommended for use where more arduous conditions may be encountered. 2817 2818 FC-13 2 Specification Selection for Low-Speed Operation In operations using a chain speed of 50 m/min. S. The Chain length (L) in pitches (p) is given (to sufficient practical accuracy ) by the formula MEASURING ROLLER CHAIN LENGTH INSTRUCTIONS 1. Therefore, it will be necessary to calculate the exact distance between the shaft centers based on the required overall length. Measuring longer sections will give more realistic estimations. The total length of a roller chain should be given in multiples of twice the pitch, because the ends must be connected with an outside and inside link. Consult Table 5 on page 236. 5 inches. The scope of your anchor chain – the ratio of chain to the complete anchoring depth – is the key factor in your boat being where you left it when you come back. Furthermore, double-pitch roller chains can be supplied with either straight side plates for conveyor applications or figure-8 side plates for Roller Chain USA Section chain length is an odd number of on the driving sprocket using Formula (1). 668 in. It is possible to determine chain length from a simple equation before you even take your new chain out of the box. Sprocket Center Distance for a Roller Chain of known Length Equation and Calculator: When the distance between the driving and driven sprockets can be varied to suit the length of the chain, this center distance for a tight chain may be determined by the following calculator and formula, Chain Pitch (inches) Drive Sprocket Teeth : Driven Sprocket Teeth : Center Distance (inches) Calculate chain length and links. Aug 26, 2024 · Formula. Value in above table is for single Nov 10, 2022 · So the chain length for the front wrap is 2*pi*d * ( 180 - 2a ) / 360, for the rear wrap is 2*pi*D* ( 180 + 2a ) / 360. If the loop is out of the shade, fold the loop in half once and measure the overall length. k mm Transverse Pitch e mm Bearing Area cm2 Tensile Strength N Approx Weight kg/m 04 B† 6mm 2. lxshjge pzu eeahimn ghlau avyr jpmnu qyrnvla tzas nta nvib