The 13-amp enclosed induction motor generates enough power to rip thick stock or challenging dados, while the cast-iron tabletop offers a sturdy and roomy workspace. Proof of replacement may be required. It has a standard 4" dust port. Storage fees will be charged. ridgid table saw serial number location - jamiemcatee.com Ridgid 10" Table Saw Blade Guard for 113.xxxx. Ryobi tools and machines have an additional number, like a type number. Milwaukee calls their model numbers "catalog numbers" (CAT NO.). This weight can vary slightly depending on the specific model and make of the saw. When a visitor to eReplacementParts.com enters the Echo trimmer model number "SRM-265T" in our model number search field, the results look like this: Three type number groupings of Echo trimmers are listed to match the "SRM-265T" model number search. 10 inch Pro Jobsite Table Saw with Scissor Stand. There are of course exceptions to this. This Agreement gives you specific legal rights, and you may also have other rights which vary from state to state. Your package model number is located on the outside of your box. There is a circular plate fixed at the front handle, where you can find the serial number. Porter Cable. Copyright 2023 eReplacementParts.com Inc. RIDGID: Built For Those Who Know . Whether youre a beginner or a seasoned woodworker, the Ridgid table saw is an excellent choice for your next project. Note: The RIDGID Lifetime Service Agreement is only available for eligible RIDGID tools purchased at THE HOME DEPOT. ridgid table saw parts. I am remodeling my garage and want to add more circuits than the remaining slots can accommodate. For accurate parts ordering, some Echo tools use long type numbers that fall within a range of compatible type numbers for that tool model. S/N 99244P0328. #1 Home Improvement Retailer . Pieces of eligible equipment that are not re-registered within 90 days of replacement are not covered by the Lifetime Service Agreement. These programs only cover wear and tear or failure of the tool arising under normal usage and proper maintenance. As seen above, this category number (model number) pulls up nine different types of this Milwaukee tool with the same category number. To remove the blade from your Ridgid table saw, raise the blade guard and remove the insert. sliding compound miter saw with laser double insulated (40 pages), 12" compound miter saw with exactline (60 pages), 12 in. The serial number on a Ridgid table saw can be found on the front facing of the box in the bottom right-hand corner under the Lifetime Service Agreement logo. RIDGID thermal imagers feature the latest technology to help you efficiently predict problems before they happen and prevent costly downtime. 1 review. Those numbers in the parenthesis, (512000001-707000000) and (707000001), those are Ryobi bar code numbers (type numbers). If you need to find the serial number for your particular saw, you can do so by following these steps: Locate the Nameplate on the front of the saw. If you dont have access to the internet, enclose a letter with the following information: First name, last name, e-mail, date of birth, phone number, address, city, state, zip code, model number from package, and the model/serial number of all qualifying serialized tool(s), battery(s), and charger(s) if applicable. The grinders measure about 16 inches long by 4 inches wide by 5 inches deep, have a 6-inch wheel . After identifying the model and type number of the tool, finding the right parts for that tool on eReplacemetParts.com is easy. That saw might not be a de-branded saw but look out for it. Makita products do not have type numbers. It's the larger 10" model with a brand new Ridgid Blade installed. http://www.ridgid.com/us/en/service-centers-repair. SUBSCRIBE TO THE RIDGID PIPELINE ENEWSLETTER, Click to view our Accessibility Policy and contact us with accessibility-related questions, View All Diagnostics, Inspection & Locating, 10 inch Contractor Table Saw with Cast Iron Top, 10 inch Pro Jobsite Table Saw with Folding Stand, 10 inch Pro Jobsite Table Saw with Scissor Stand, 15 Amp 10 in. Dirt Devil vacuums have letter-number combination model numbers displayed some where on the name plate. Type in Keywords, Model Number, or Product Name Miter Saw Utility Vehicle - ac9946, ac99461; Download Now . The Ridge Tool Company is a manufacturer of Ridgid Table Saws. Location; General Description of Taxation. The model and type number are usually displayed on the name plate, with the model number above the type number (see picture below). Model # R4520 Store SKU # 1001490817. Ridgid Table Saw R4512 Review- Here is Our Thought - Woodworker Help 2. RIDGID Tools are backed by the best coverage in the industry. R4514 table saw serial number. Seller: Pamela Rose Auction Company, LLC. chic. Can anyone tell the age of a PM 66 by the serial number 0066783. This is certainly plenty of space to handle any large workpieces, no matter to the left or to the right. Voltage 115/230. Power: Electric . Can you Put a Dado Blade on a Ridgid Table Saw? Look for and insist on Genuine RIDGID Replacement Parts. Model Number: 36-725. Set Your Location. Items paid on day of removal and not . Tax Related Laws & Regulations. dual bevel sliding miter saw with led (125 pages), 10 inch contractor series belt drive saw (72 pages), 18 volt reciprocating saw variable speed (28 pages), Reciprocating saw variable speed (16 pages), Manual will be automatically added to "My Manuals", To Reduce the Risk of Injury from Jams, Slips or Thrown Pieces (Kickbacks or Throwbacks), Plan Ahead to Protect Your Eyes, Hands, Face and Ears, Additional Safety Instructions For: Rip Cuts, Additional Safety Instructions For: Crosscuts, Checking Heeling Adjustment or Parallelism of Sawblade to Miter Gauge Groove, Checking Blade Tilt, or Squareness of Blade to Table, Mounting Table Saw to Workbench or Legset, Mounting Table Saw to RIDGID Universal Power Tool Legset #AC9910, Additional Safety Instructions for Crosscutting, Additional Safety Instructions for Rip Cuts, Saw RIDGID Contractor TS2424 Owner's Manual, Page 3: Safety Instructions For Table Saw, Page 4: When Installing Or Moving The Saw, Page 5: To Reduce The Risk Of Injury From Jams, Slips Or Thrown Pieces (Kickbacks Or Throwbacks), Page 6: Plan Ahead To Protect Your Eyes, Hands, Face And Ears, Page 8: Additional Safety Instructions For: Rip Cuts, Page 9: Additional Safety Instructions For: Crosscuts, Page 11: Motor Specifications And Electrical Requirements, Page 12: Motor Specifications And Electrical Requirements, Page 21: Checking Heeling Adjustment Or Parallelism Of Sawblade To Miter Gauge Groove, Page 23: Checking Blade Tilt, Or Squareness Of Blade To Table, Page 26: Aligning Sliding Table Extension, Page 28: Checking Sliding Table Extension, Page 30: Removing And Installing Sawblade, Page 34: Mounting Table Saw To Ridgid Universal Power Tool Legset #Ac9910, Page 35: Safety Instructions For Basic Saw Operations, Page 36: Plan Ahead To Protect Your Eyes, Hands, Face And Ears, Page 48: Using Featherboards For Thru Sawing, Page 49: Using Featherboards For Non-Thru Sawing. . With thousands of repair parts, diagrams and parts lists, we have everything you need to get your RIDGID tools back to work. Skil. 5 reviews. Have comments or questions? A RIDGID representative will assist with verifying eligibility for replacement over the phone. RIDGID Tools - 12" Miter Saw w/MSUV, 13" Planer, 10" Table Saw . RIDGID 10 in. As an Amazon Associate we earn from qualifying purchases. If our online system sees your receipt in The Home Depot receipt database, it will then search for the item you are registering. Using this site, you have 24/7 access to Genuine RIDGID Replacement Parts. The 1-3/4" thick granite top is a terrific feature. The Ridgid R4512 is a contractor saw with a 13 amp, fully enclosed fan-cooled motor. Blade Brake: - Stops blade for quicker transitions in between cuts. RIDGID Table Saws Blade Size: A popular pick is the RIDGID 10-inch table saw, which uses a 10-inch diameter saw blade that can rip a 4x4 in one go. how soon after gallbladder surgery can i get a tattoo, Height Adjustable Rear Cargo Area Deck Board, Is The Living Church Of God Seventh Day Adventist. Different types of the same tool model usually, After these general guidelines, the next move to make is to become familiar with the. What is the Horsepower of Ridgid r4512 Table Saw? 41 $33.63 $33.63. Shop this Collection. Do you have to Register RIDGID Tools for Warranty? RIDGID drain cleaning tools, ranging from hand tools, sink machines, drum / sectional machines to jetters, have been delivering reliable performance to the skilled trades for decades. I search eReplacementParts.com by entering the model number, "105R," into the "Model Number" search field and arrive at the page below: Looks like there are two "types" for my trimmer model. The numbers are labeled clearly and visibly somewhere on the tool. Pickup Set Your Location Today 2+ days. Granted, it features a powerful 15 amp motor that delivers up to 4000 RPM no-load speed. Ridgid Table Saw | Kijiji - Buy, Sell & Save with Canada's #1 Local Price: 499.00. Step 1 was to place the saw upside down on a few wood runners. In addition to a model number, they also have what is called a engineering number. Important Safety/Recall Notices | Metabo Power Tools delta table saw parts. We build tools to last a lifetime, and we back them with industry-leading warranties and support. RIDGID products are designed and built to the highest quality standards to perform specific tasks with optimum and lasting efficiency. We like the smooth-operating table extension and the blade guard's hold-up feature and ease of installation. Ridgid TS24240 10" Table Saw Parts. These programs also cover replacement rings, driver blades and bumpers on RIDGID Brand pneumatic tools. AC9946_AC99461_678_trilingual_02.pdf Pro Jobsite table saw. Asset Location: 1065 Sunningdale Rd E London, Ontario N5X 4B1 Canada Map to this location: I have a TS3650. Contact Us. 2 MB Download. The serial number could be stamped or printed onto the label, or etched into the tool within the label design. To the extent they cannot be disclaimed they are hereby limited to three years from the date of purchase. Note that for this same reason, the serial code of a replacement piece of equipment cannot be used to verify warranty. Trusted tools for the most demanding threading and pipe fabrication jobs. They do not cover any malfunction, failure or defect resulting from misuse, abuse, neglect, alteration, modification or repair by anyone other than an authorized service center for RIDGID brand hand held, pneumatic and select stationary power tools. Click to see full answer. Model numbers are usually displayed at the top of the Skil name plate. We were unable to add your email to our mailing list. A RIDGID representative will assist with verifying eligibility for replacement over the phone. RIDGID has always been a reliable brand when you think of plumbing equipment and power . That means that most Ryobi tools don't have type numbers, and that type numbers are not needed for ordering. Where is the serial number on a Ridgid table saw? I'm looking for the kick back for my ridgid not sure the model number Where would I find the . waste management northport al; malformed utf-8 characters, possibly incorrectly encoded pdf; puppeteer-extra-plugin-stealth npm; the chalk mine aiken golf course; ridgid table saw serial number location. Some model types are only distinguished by the year of the model. Find "Ridgid Table Saw" in Canada - Visit Kijiji Classifieds to buy or sell, new & used items. Now it's just a matter of matching that Milwaukee tool serial number to matching serial on the page, like below: Searching with a Milwaukee tool catalog number, and then matching its serial number is the same process and searching with a model number an matching type number. Location: Toledo, OH Order vehicle history report. RIDGID TABLE SAW USER MANUAL Pdf Download | ManualsLib print Print. Ridgid Table Saw | R4513 | eReplacementParts.com Have comments or questions? The Lifetime Service Agreement is available free of charge, on all eligible RIDGID Brand hand held power tools (corded and cordless), select stationary power tools, batteries, pneumatic tools, compressors, and outdoor power equipment and is subject to the terms and conditions stated below. Here are a few more Bosch nameplates that will help for finding the right model number and engineering number. On many corded tools, the serial number is located on a product label, often near the motor or motor housing, in an area similar to where you will find the 10-digit product number. Inventory Number 0721-089-0049: Manufacturer Ridgid: Capacity: Model Number: Serial Number: Quantity 1: Aisle W4: Bay: Electrical: Weight (lb) 23: Category Not Specified Yet: Make Year: Location Euclid, OH: Description Ridgid Cutoff Saw 0721-089-0049 Location: Rochester, NY. This recall involves Metabo W14-150 Ergo series 6-inch medium angle grinders. Yes, you can put a dado blade on a Ridgid table saw. It works and has held up for plenty of cuts but i dont feel it's perfectly square and ive tried adjusting the fence with no luck. The model number is almost always to the right of the Bosch logo. Gather your tool, battery (s), and charger, then call our Direct Ship line at 18776555346, Monday - Friday, 9am - 6pm (EST). Here are the steps: This will navigate to a page that displays all types that match the model number entered. The Lifetime Service Agreement is available free of charge, on all eligible RIDGID Brand hand held power tools (corded and cordless), select stationary power tools, batteries, pneumatic tools, compressors, and outdoor power equipment and is subject to the terms and conditions stated below. Ryobi BT3000. Original receipt is required to verify warranty status. What do I do with my expired product? Weight and Location. The 10-inch table saw sports an updated design, allowing it to be used on a variety of applications. We'd love to hear from you! Select delivery location. Join Date: Apr 2005; Posts: 178; City, State: Ohio; Occupation: . Both the model and type number is needed when searching for Karcher replacment parts. Can I use a Dado Blade on my Ridgid Table Saw? You must adjust the blade height to level with the table. Follow. However, we will often list "Type 1" or "Type 0" for the first redesign of a tool model in a type series, even if the manufacturer does not list "Type 1" or "Type 0" on the name plate. Contractor grade saw. RIDGID SeekTech Inductive Signal Clamp Manual. Note that the replacement of all accessory batteries and chargers must have a receipt to verify warranty status since these items are not sold with a tool console in a kit. Details; Terms . Hoover vacuums have model numbers that start with at least one letter. hassle of major digs. The Lifetime Service Agreement (LSA) is a promotional program (that applies to eligible product categories) upon registration completion. Karcher model numbers are combinations of letters and numbers that vary in length and usually start with letters. Ridgid TS2400-1 10" Portable Table Saw with Ridgid Work-N-Haul It Two Wheel Work Stand . Milwaukee calls their type numbers "serial numbers" (SER). To remove the blade, hold the arbor wrench securely and pull the arbor nut wrench towards the front of the table. In this case, the tool serial code must be used to verify warranty, NOT the battery/charger serial code. Some type numbers are especially difficult to find on the tool or machine. "Love the flexibility of the app to add everything in the home and garage. RIDGID 12 in. in our search box will navigate to a page of potential matches (serial numbers): Searching with a Milwaukee tool catalog number, and then matching its serial number is the same process and searching with a model number an matching type number. How To Find Serial Number.pdf. Join Our Mailing List For Product Giveaways, Announcements, and Promotions . Because we never want a customer to lose out on the LSA promotion because of a technical issue beyond the control of either you or us, our online system requests you complete your registration by mail when it cannot verify your purchase information electronically. Portable Table Saw. The DELTA 13-amp 10" Carbide-Tipped Table Saw is __LOWES EXCLUSIVE__. Ridgid R4513 Table Saw Parts. Compatible with most standard miter saws. the side of the miter saw arm, on a plate fastened to . View More Details. Help identifying Craftsman Table Saw model number Sometimes type numbers are displayed in parentheses, like " (Type 1)" or " (0601916460)". to the correct tool name and icon displayed on the page. When searching for Hitachi parts, the model number is the only number needed. Models that are not assigned type numbers will not have a type number displayed on the web page. The R4513 has changed to use plastic gears on the blade tilt mechanism. Number Description Qty. $30.41 $ 30. Model number: R4040S. Ridgid Table Saw Reviews | The Top 5 Ridgid Models Out There It is your best assurance of performance, efficiency and long service life. We have seen some tools go up to type 7 or more. Welcome to The Ridgid Registration Center. I'd normally be sceptical of a deal that seemed this good, but having good faith in . Ships in 4 - 10 business days Ships in 4 - 10 business days Note: 11-15-19 (Rev:06) $2.99 . The rails are connected to the posts via a series of tabs, which allow the rails to slide back and forth. Ive already thrown away my box. The Karcher K 2400 HH (1.194-301.0) Pressure Washer Parts. $2.99. Lot # : 65 - Ridgid Table Saw Model #TS24120, . RIDGID Tools are backed by the best coverage in the industry. The Ridgid 10 inches Pro Jobsite table saw will come with an aluminum . BUYERS AMOUNTS UP TO $2,500 WITH 3% ADDITIONAL FINANCE CHARGE The serial number of the RIDGID table saw is located on the front handle of the saw. The Taxpayer Rights Protection. When searching for Makita parts, the model number is the only number needed. How do I register? Emerson has a long history of providing quality products and services that improve the lives of people around the world. This is a great way to make more precise and clean cuts on your project. For example, two different power sander designs from the same brand would be distinguished by having two different model numbers. All Lifetime Service Agreement communications should be directed to One World Technologies, Inc., attn: RIDGID Hand Held and select Stationary Power Tool Technical Service or call (toll-free) 1- 866-539-1710. However, we will often list "Type 1" or "Type 0 . The letters that end Hoover model numbers are sometimes left off. Finding Tool Model and Type Numbers : eReplacementParts.com The saw is known for its durability and performance and has a wide range of accessories available to further its capabilities. If you're not sure whether it fits your model, please email us-includes your Models and serial number. Motor size: 12 Amp. Brand: Ridgid . PRODUCT DETAILS Genuine, OEM Ridgid Dado Throat Plate, part# 080035003093 Genuine, OEM Ridgid parts INCLUDES (1) Dado Throat Plate. This is true for every brand, that they separate major designs by model number. Located: NORTH BATTLEFORD, SK. The 3 Year Limited Warranty, The Recon Limited Warranty and the Lifetime Service Agreement covers all worn parts in properly maintained tools. SUBSCRIBE TO THE RIDGID PIPELINE ENEWSLETTER, Click to view our Accessibility Policy and contact us with accessibility-related questions, View All Diagnostics, Inspection & Locating, https://register.ridgidpower.com/replacement. All RIDGID Power Tool products come with an automatic 3-year limited manufacturer warranty. This item: Universal Mobile Miter Saw Stand with Mounting Braces. If there is only one type for that model, only one option will be displayed. Ridgid . Any such implied warranties are expressly disclaimed. Keep track of this number as you will need it in order to obtain service for your product under the Lifetime Service Agreement. The combination of the rack and pinion system and the folding stand make the Ridgid table the ultimate portable table saw. There are of course exceptions to this. Add to cart. Model numbers distinguish between a manufacturer's tool models within a certain category (like drill/drivers or nailers). Here is an example: When DeWALT comes out with the first version of a tool, it is usually a Type 0 or a Type 1. Join Our Mailing List Ridgid R4512. Event: Online Only Contractor's Auction. DIABLO 12 in. The tool-free conversion from belt to spindle helps you quickly and easily make changes, so you can complete . Select delivery location. Update | Cancel. Add to Watchlist. These programs also cover replacement rings, driver blades and bumpers on RIDGID . Always mention the model number in all correspondence regarding your MITER SAW or when ordering repair parts. More Buying Choices $28.37 (4 new offers) Tolxh Replacement Part NEW #080009022002 Riving Knife for R4020 Job Site Tile Saw for Ridgid. RIDGID Tools are backed by the best coverage in the industry. Because it is possible that our online system will not be able to verify your registration online, both the final page of your online registration and the Registration Submitted email you receive explain, If your product and/or proof of purchase information provided cannot be confirmed, you will be asked to submit your registration information by mail in order to complete the LSA approval process.. We'd love to hear from you. Once it verifies the item and the receipt, you would receive a confirmation email to let you know your item is under the Lifetime Service Agreement (LSA). Porter Cable products often have serial numbers as well, but these are usually not needed for ordering. Free Parts and Service for Life with Registration. The R4513 has a different design push stick and miter gauge. Genuine Ridgid Part # 089290001700; Genuine OEM Ridgid Part . Every time they make a change to the parts in the tool, they come out with a new type. The table saw is a powerful tool that can be used to cut through different materials. It should be a 6 or 7-digit number preceded by the letter "S". Skil uses the "Type 1" kind of type numbers, or. $54.97. RIDGID introduces the 13 Amp 10 -inch Professional Cast Iron Table Saw. x 80-Tooth Fine Finish Circular Saw Blade. Paid almost 600$, looking to get 300. Eureka model numbers can be just numbers or numbers and letters. Bob D. 2004 "? su no ou no op `s lq s," Ridgid products do not have type numbers. Skil uses a typical model#/type number system. Location Plate. We carry that particular table saw with . Ryobi can be a tricky one. The 3650 has an issue with the arbor and dado stacks. Accomplish your task safely with the help of Ridgid miter gauge. Milwaukee serial numbers can be letters, numbers, or both. If you need to find the serial number for your R4510 Ridgid table saw, there are a few places to look. On it he will find the model number and the serial number. Ships in 6 - 12 business days Ships in 6 - 12 business days . Serial numbers are usually displayed in the top-right area of the name plate. Some Echo tools, like the trimmer pictured below, don't use a simple type number system that corresponds to only one tool. Drive Belt Compatible with Ridgid TS24120, TS24121, TS24240, TS24241 The Lifetime Service Agreement covers all worn parts in properly maintained tools. Item: Table Saw . Brand New Genuine Ridgid 089290001700 Throat Plate Fits R4513 Table Saw OEM. 3 Where Is The Model Number On A Miter Saw. 1. Sign in to register your tool or access your account Sign In Forgot Password? Add to Watchlist. 2023 Emerson Electric Co. All rights reserved. I registered online and entered my Home Depot Receipt number. Type numbers usually go by "Type 1," "Type 2," etc. Verification for any product registered for the Lifetime Service Agreement online takes up to two weeks. Have comments or questions? Don't have an account? Final Removal Date 12/20/2019. Number Description Qty. x 14 5/8-in. Our online system uses the receipt information you provide, specifically your receipt code, to search The Home Depot receipt database. Thanks in advance. It is usually on the front facing of the box in the bottom right hand corner under the Lifetime Service Agreement logo. Some boxes may differ. FREE delivery Mon, Mar 6 . Porter-Cable uses a typical model#/type# system. It should be a 6 or 7-digit number preceded by the letter S. If they are out of warranty at least i might have a leg to stand on for price negotiation in this insane used tool market. Stratford 05/06/2022. This number is usually highlighted in a white box and begins with 1-2 letters. We have seen some tools go up to type 7 or more. Handwheel. Phone Number:886-2-2394-9211 Fax Number:886-2-2351-4382 National Tax and Local Tax Toll-free Services0800-000-321(Services available during office hours) I am trying to figure when a Ridgid 1822 threader was built Serial Number EA-02405. The Ridgid R4513 was engineered for heavy duty applications. March 4, 2023. Sometimes type numbers are displayed in parentheses, like " (Type 1)" or " (0601916460)". The first two digits indicate the year of manufacturing, whereas the second two indicate the month and day of . RIDGID introduces the R4514 10 in. In addition to a model number, they also have what is called a engineering number. If you're not sure whether it fits your model, please email us-includes your Models and serial number. Trust Your Tools with Genuine RIDGID Parts. Pro Jobsite Table Saw with Stand. March 4, 2023, What Is A Hybrid Table Saw? Join the community and talk with other pros today. Receive money-saving advice and special discounts! 7. microReel APX Catalog Sheet. Get free shipping on qualified RIDGID products or Buy Online Pick Up in Store today. When Ridgid updates a product, they change the model number to reflect the change. Unlike other benchtop tools, the RIDGID 10 in. Apply for a Home Depot Consumer Card. The majority of Ryobi tools just have model numbers that change with each service update. Table Saw with Folding Stand, 13 Amp 10 in. How will I know if Ive been approved for the Lifetime Service Agreement (LSA)? Ridgid Chop Saw selling from local construction company 14" diameter 1" abrasive 3900rpm 120v works 1 extra blade viewings encouraged located at Kobza Auction in David City, Nebraska Ca. The 3 Year Limited Warranty, The Recon Limited Warranty and the Lifetime Service Agreement are only applicable to the original purchaser and may not be transferred. Simply register this tool within 90 days of purchase and receive FREE Parts, FREE Service, FOR LIFE. Sometimes type numbers are displayed in parentheses, like "(Type 1)" or "(0601916460)". Serial Number 140849626. Bid History for Ridgid Table Saw Auction Start Date: 11/24/16 9:29 AM ET Auction End Date: 12/01/16 9:29 AM ET . Bosch is a little different than other brands. Additionally, registering your tools allows RIDGID to keep track of them in case they are recalled. or a valid Social Security card with photo ID). $399.00. RIDGID - Table Saws - Saws - The Home Depot Eddie. As some of you may have read in the other thread, I picked up the Ridgid R4221 for $300 with stand on Black Friday. Anyone know how to read the date code on ridgid tools? To obtain service for this RIDGID tool on either the 3-year limited warranty, the Lifetime Service Agreement, or the recon limited warranty, you must bring the equipment, to an authorized RIDGID service center. Model Number: TS2400-1 . Rigid Table saw from 10 years ago | LumberJocks Woodworking Forum Deadwood Crafted Tools dct table saw fence and miter gauge for table saw with 3/8in x 3/4in miter saw fence bar - table saw gauge, 18 inch .