1/8 WOODRUFF KEY Carbon Steel BS46 609 Woodruff Keys Woodruff Keys, BS46 Part 1 1958, Carbon Steel, Whitney & SAE Std 16, BS 1958 ASME Std 609, Woodruff Key Assortments AvailableParallel Metric Keys and Keyway Dimensions - Roy Mech. Slide the impeller housing assembly over the shaft, making sure to align the Woodruff key with the impeller keyway. 2-1967 (R1998) -. The thickness of the key is uniform. Woodruff keyway metric ansi inchesStandard keyway sizes chart Keyway dimensions metric key js9 iso tolerance per hub radius width depth diameter nominal thru hasn answered question yet been7 piece mini sized. The middle portion of the key has a gap to fit the hub. The 1/4 shaft diameter spec conforms to the 1/8" keyways in the 1/2" sprocket hubs. Woodruff keys work well near shaft shoulders and on tapered shafts. Please note that the key sizes in parentheses are older sizes that are no longer commonly used. Install the 8 x 40 mm bolts, wa ter tube seal holder, and twoАs а result, оur сlients mаy sаve mоney, reduсe energy usаge, аnd оbtаin а high-quаlity finish with а lоng lifesраn. The key is listed as a Hi Pro type in the parts lists and that is what you are describing. 086" 0. WOODRUFF KEYS WITHOUT PINS. WOODRUFF KEY DIMENSIONS - METRIC - BS4235:2 -1997Drill Size & Decimal Equivalents: Imperial Tap Chart: Keyway Dimensions: Melting Points: Metric Tap Chart: O-Ring Sizes: Pipe Threads:. Woodruff keys work well near shaft shoulders and on tapered shafts. This Standard covers the size, type and tolerances of parallel and taper keys and keyseats, and their relationship to shaft diameters and bore diameters. The slot in my crankshaft is worn and the woodruff key is loose. It is typically used to attach gears, pulleys, and sprockets to a shaft. Service Factors. Choose from our selection of woodruff key assortments in a wide range of styles and sizes. Check Details. 9 20 12 76 86. Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyGates belts, hoses, and applications: standard & non-standard shaft key Keyway sizing engineeringMetric keyway chart printable. 6 - 10mm x 16mm Imperial - 1/6" x 1/4" - 3/4" x 3. The standard key size for a straight key in a shaft is one quarter the shaft diameter. The Quick Hit free casino slots, metric woodruff key slot dimensions. The woodruff key is an easily adjustable key. Shaft Stress and Deflection. Standard keyway dimensions Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k key Metric key keyway dimensions Key allen dimensions hex sizes chart metric ln keys socket hexagon tool. These are the standard woodruff keys that are full half-circle in size and are designed to fully interface with the shaft’s key seat. Woodruff key. Wide range of sizes, material and finish available. Keyseat Design Tolerances for Electric Motors and Generators. 🚀【Woodruff Keys Half Moon Assortment Kit】: In this set, you will get 155Pcs Carbon Steel Woodruff Keys Half Moon Assortment kit. SKU: WRFIMP-0 UPC:. 846. WOODRUFF KEY DIMENSIONS ANSI Key No. See our Woodruff Key. Boring; Tool Holding; Special Tools; Top Categories. WOODRUFF KEYWAY DIMENSIONS - METRIC - BS4235:2 -1997. EQS-B2-1 1. Inch keys conform to ANSI B17. Email. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. $2807. Polaris Side by Side 2005 RANGER XP - R05RD68AA Crankcase & Crankshaft /Ab. Woodruff Key Depth Chart Pdf Eventually, you will totally discover a supplementary experience and ability by spending more cash. blu_by_u. Apr 02, 2019 Woodruff Key Slot Dimensions Key Sizes Imperial Dimensions Sizing Chart Mechanical Size Medium Cutter Metric Key. com | 888-390-2050 Technical Information Cutting To ols Keyseat Cutter Considerations: • Select a tool with the shortest allowable overall length to ensure the strongest tool setup possible. Metric External Table Chart Thread Designations Sizes M 1. Conveniently packaged in a variety of piece counts to assist with both small and large projects. 95. 6 6. Key Size 10 mm × 16 mm (10 Each) Plastic Box:. YOU PICK SIZE FROM VARIATIONS si in chart below. ANSI Woodruff Keys. Filter by Availability Filter Results Filter by Vehicle Individual Parts. Keyway metric key iso dimensions standard keyways r773 keys pdf bores shaft hub depth diameter standards engineering table edge width. Please refer to Metric. Key Steel - Material : Steel C 45K • Available in standard lengths of 1M. A Woodruff key is a half-moon like a semi-circle with a similar length that usually fits into the circular opening of the shaft. Nominal Key Size W x D Width Diameter Height Full Radius Flat Bottom 201 206 207. YOU PICK SIZE FROM VARIATIONS si in chart below. Full-Radius Woodruff Keys. The following is summarized from the American National Standard Keys and Keyways for Milling Cutters and Arbors ANSI/ASME B94. Easy to Install. 800-243-0986 (US) or 203-775-4877 (INTL). 2 Woodruff Key Size Table Chart ANSI B17. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. 1" OD 10pc Coated HSS in great quality padded carry box Set includes sizes in the chart below We sell single sized woodruff cutters, click. The crankshaft woodruff key's curved section would be pressed into the keyseat, while the key's flat side interfaces with the slot in the hub, gear, or. 5000 2. Side View. Shaft Key Seat Depth Control Values S and T for Shaft and Hub ANSI B17. Parallel keys are rectangular shapes with ends that are square (DIN-6885-B), round (DIN-6885-A), or both (DIN-6885-AB). You probably bought a rebuilt or remanufactured pump. The Woodruff key is #STD 580025. 2; Thread Shear Area for. Length, Buick, Chevy, Pair. Add To Cart. 4L/454 Crankshaft Woodruff Keys. but by the time you blow it up to a bigger size , it gets kinda fuzzy . British Standard Metric Keyways for Square and Rectangular Parallel Keys 11 5/16 3/8 7/16 1/2 3/4 3/4 7/8 Nominal Diameter, d 6 1/2 7 1/2 9 Square Keys preferred for shaft diameters above this line: rectangular keys, below Key 3 3/4. Item #: MOPP5249822. 7x10 2. Woodruff cutters are used for milling (cutting or shaping) woodruff key slots in materials such as steel and aluminium. 【Neatly Organised】The woodruff key assortment comes with a plastic storage box, neatly organised, with chart inside box lid for easy selection, which is portable and convenient to access and store. Choose from our selection of woodruff key assortments in a wide range of styles and sizes. Semi-circular pocket in the shaft directly cut by woodruff key cutter. Also Available in Nickel and Dacromet Coated Roller Chain. 7 Woodruff Key. Upgrade does not raise price 2 x Metric Woodruff Keys 3mm x 5mm DIN6888. ASME B1. Woodruff key is a type of sunk key. Both cutters are made from one piece of high-speed steel for strength and heat treated for longer runs and better performance. Woodruff Keyseat Cutter: 0. com: steel key stock, standard tolerance, metric, 2 mm thickness. Keyways Index. The extended ends prevent the key from trying to rotate when installing. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. 11060 Metric Woodruff Key 5. Woodruff Keys - Metric - Nordex, Inc. Technifast supply woodruff keys to DIN 6888 / ISO 3912 metric sizes and BS 46 Part 1 imperial sizes. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. In the English and American system, the keyway in the hub is dimensioned by the width and the depth at the side, but in the metric system the keyway is dimensioned. Coupling Design: K d: Fixed (tight fit) while loaded: 1:Metric Woodruff Keys. Request No Charge Material Cert. Flange Data. Woodruff keys measure 3/16 in. This, and the other journal diameters are usually sufficient to make positive identification. They are also often used on tapered shafts. . 5mm. 1″ Long x 3/16″ Wide, Steel. L. Designed for cutting keyways and keyseats, these woodruff-style cutters are designed with dished sides for clearance. View Spec Sheet. Hide Filters . Shaft Keys Types and Their Design from Sweet woodruff is exceptionally easy to grow and readily adapts to a wide range of soil and moisture. We have in stock ready-to-use keys in inch and metric sizesYou can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. NOMINAL SHAFT DIAMETER. Shaft diameter is 3/4". The 1/4 shaft diameter spec conforms to the 1/8" keyways in the 1/2" sprocket hubs. The breаdth оf the fасe vаries frоm 1 mm tо 15/64 inсh. 2mm. 2; ANSI Shaft and Hub Keyseat Dimensions for Woodruff Keys per. The 200-series is full radius; all other Woodruff Keys have a flat bottom. A4 stainless steel are also available to order. com: steel key stock, standard tolerance, metric, 2 mm thickness. Find Your Style – The Savvy Shoppers' Guide to Plus-Size Fashion. Gib Head Keys. Keys and keyways secure the hub and shaft to prevent relative movement between a power transmitting shaft and an attached component. 020 364. HaSaoMoi 200pcs Metric Woodruff Key Assortment Kit with 15 Most Popular Sizes - Woodruff semicircle Key - Half Moon Key - Keyway - Shaft Crank Key. IMPERIAL WOODRUFF CUTTER SET 3/8" - 1" OD 10pc Coated HSS in great quality padded carry box Set includes sizes in the chart below We sell single sized woodruff cutters, click here Part Number Cutter Dia Size WIDTH Shank. woodruff key dimensions. DIN 1481. 002 -0. keyways /keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keys. I thought I saw once it was 3/16 x 5/8. this arbor has a u shaped recess and the arbor end has no slot. 6 mm (25 Each) Key Size 2 mm. Made in USA #405 Standard Woodruff Key. Woodruff. Woodruff cutters can also be used for: • Drilling. Shop our huge selection of OEM, MRO, construction, industrial, and safety products. It fits in a half-moon shaped slot, in a shaft, leaving the flat side of the tab exposed. WOODRUFF KEY KIT PIECES SIZE 20 20 20 20 20 20 20 2x2. gob. It represents manufacturing practices for sizes and types from 1/16 in. You can buy the Woodruff key at Sears but 65691 is no longer available. 6. 5: 4You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. Apr 02, 2019 woodruff key slot dimensions key sizes imperial dimensions sizing chart mechanical size medium cutter metric key. DIN 6888 Contains 10 x S. Shaft with Two Keyways Torque Applied Deformation and Stress Equations and Calculator. 218 06602 T6S-0 T-806 DWKC-806-TE06-050 65141 2. Loading Estimated Ship Date: Today. Results 1 - 10 of 10 25 Records Per Page Default Sort . 7 10 9. The key close to the motor is a square key #65691 and the key closest to the blade is a half circle called a Woodruff key. Mfr# 13CARBON. 12mm. Metric keys conform to DIN 6888 standards. Gates belts, hoses, and applications: standard & non-standard shaft key. D. 03 Finished Straight Bores For Standard Finished Straight Bores AGMA Class 1 Clearance Fit For Standard AGMA Interference Fit Nominal Nominal Shaft Bore Dia. 3 16 10 59 65 18 4. Key Size: 3/8 x 2-3/4 in: Usa Standard #1222-1: Material: Alloy Steel: Standards: ANSI b17. Square key and Flat key. REACH Compliance. 6mm 2mm x 2. Product Description. Because the keyseat is circular, the key will self-adjust to angled spines. British ISO Metric Screw Threads Designations. Your vehicle deserves only genuine OEM Honda parts and accessories. Keyway key parallel jis sizes tolerances 1301 mm 1996 pulley excerpt unit techKeyway metric Table aii-12. Over Width, W Height, H. Woodruff key cutter size chart. FREE SHIPPING IN LOWER 48 STATES! All Red Boar Chain chains are solid roller, #120 and larger are solid bushing solid roller ensuring a longer wear life than split roller and split bushing chain. Keys standard metric keyways mechanicalMetric keyway shaft depth reference dimensions diameter iso r773 width Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyKeyway metric dimensions keys. Join the slots mania and spin winning slots all you want! This wonderful slots collection of hundreds of classic slots is available for you. 95. $5. SIZE RANGE – WOODRUFF KEYS Woodruff Keys, DIN 6888 (Metric) Width ‘W’ Height ‘H’ Length ‘L’ Diameter Key No(d2 x 2) 1. Woodruff Keys. 12mm. 5 times the shaft diameter to ensure a good. 3mm X 17mm. 7x10 3x5x13. These keys have a rounded shape that makes them easy to remove when parts need to be taken apart frequently. 2 with table design. The key’s main function is as a fail-safe or sacrificial device to ensure that there is no damage to the gears in the event that the gears become. 1. Choose from an extensive array of either arbor or shank style cutters in a multitude of cutter diameters, widths and materials to suit a range of keys. Woodruff Key The Woodruff keys are semicylindrical in shape and are manufactured in various diameters and widths. Org. Keyway metricStandard woodruff keys Standard woodruff keysKey steel metric rectangular keys machine chart iso standard flat. Shaft Collars, Couplings, Mounts & Keys / Woodruff Keys / #67988287; Print. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. This 8-page chart lists the Wheel Horse part number and the Woodruff number. Filter Results. 2-1967 (R1998) - Engineers Edge. Woodruff Keys. 77 (+GST) Each. 2mm. In October’s column, I mentioned the typical tolerance for key-ways. There are 17 different sizes in the package meet your using needs in daily work. 4mm x 6. Design of Square Key and Keyway (Wood Ruff) Stress, Shear and Torque. Cross Reference Charts Industry Charts Product Literature New Products ScanTel® Software & Instructions Shop Talk Digital Backsheet Builder How-To Services. But ensure the weakened shaft can support the load. A rounded bottom allows these keys to rock in their seat to relieve stress on the shaft caused by vibration or misalignment. Our carbon keys are normally made from cold drawn SAE-1035 steel and come in a wide range of metric sizes. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. Designation of a Woodruff key of width b 8 and height b 11 n: woodruff key 8 x 11 6888 Cross—section of Width b h9 Woodruff key (Half— round steel Ing to DIN Height h 10 13 32 - 0. Also suitable for a broad variety of industrial and commercial uses. My account View enquiries View collections. Product Image Feedback. It is suitable for shafts whose diameter ranges between 6mm to 60 mm. 018: 4: 0 -0. Nominal Key Size W x D Width Diameter Height Full Radius Flat Bottom 201 206 207 211 212 213 61 7 8 9 91 10 11 12 13 14 15 152 16 17 18 19 20 21 E 22 23 24 It is also possible to become a BSI member and obtain copies ofthe Standards at much reduced prices. Keyseat cutters allow for the precise milling of shafts that accept metric woodruff keys. 7x10 3x3. 7 X 10 WOODRUFF KEY Carbon Steel DIN6888 Woodruff Keys Woodruff Keys, DIN6888,Carbon Steel C45+C,BS4235 Part 2 1977, ISO 3912 - 1977 - Woodruff Key Assortments AvailableYou can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. 66 10 2 5 12. ansi standard woodruff key size table chart ansi b17 2 1967 r1998 engineers edge hardware ansi menu all dimensions are given in inches thems35756e (notice 1), military specification , key,woodruff, steel alloy, with keyway and key slot dimensions (01 oct 1998) [s/s by nasm35756] superseding spec: nasm35756, adoption notice (1 oct 1998) design guidance: mil-std-1755, military standard: keys and pins preferred for design, listing of (15 jan 1979) [no s/s document]You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. 477Decimal Equivalents Chart; Safety Data Sheet - Carbide; Safety Data Sheet - High Speed Steel; Custom Tools; News; Contact; Products > Milling Cutters > Keyseat Milling Cutters > Keyseat Milling Cutters. 1/2" Aprica. Ideal for a wide range of loads, speeds, and designs. 135 Pcs Woodruff Key,21 Kinds of Woodruff Key Assortment Kit,Half Moon Gear Shaft Drive Flywheel Key Pulley Crank Fasteners,Automatically Adapt Slope Requirement,Long Service Life and Durability. Also known as half moon keys. ter Chaafering or radiueing Length We t above up toWoodruff keys and keyway dimensions : Mechanics : 3 searchable steel databases (free) Home / Metric Keyways Index Woodruff keys and keyway dimensions. keyway and corresponding key sizes for English shafts are listed below in Table 1. Read more on how keys and keyways work and what types are available – Keys and Keyways. 6x7 2x3. The key length should be less than about 1. Variations of machine keys include parallel keys, tapered keys, Woodruff keys, hi-pro keys, and non-rok keys. That Woodruff key fits many ATV's. 1) Sunk Key: used for heavy-duty application. The key seat has to be precisely cut according to the key size to accommodate the key and prevent any interference between the key height and the depth of the host shaft’s key seat. Woodruff Keys; Woodruff Keys. Nominal Shaft (Arbor) and Keyseat Cutter Hole Diameter. Slightly larger than the size listed, these oversized keys offer a tight fit in worn keyways. 00 star(s) 2 ratingsGuys, The 350 that I'm building doesn't have a woodruff key for the balancer. Delivered as soon as Next Business Day* Hassle Free Guarantee Learn MoreDespite of this any liability for conversions and results is excluded. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. Charts And Tables - Generic . Standard keyway dimensionsKeyway standard chart metric broach pdf charts broaches std Keys & keyways specificationMetric key keyway dimensions per iso/r773. Carbon steel Woodruff keys are made from cold drawn SAE-1035 steel. The keyseat is cut into the shaft and the key goes into the keyseat, between both parts forming a secure bond. Woodruff keys. Keys and keyways. 163 Products. 5 2. 7L/350 Chevy small block Gen I Crankshaft Woodruff Keys. Keyway key parallel jis sizes tolerances 1301 mm 1996 pulley excerpt unit techKeyway metric Table aii-12. Nominal Shaft Diameter Nominal Key Size Normal Keyseat Depth Over Up to and Incl. These sizes cater to different shaft. Mfr# 3ALLOY. IMPERIAL WOODRUFF CUTTER SET 3/8" - 1" OD 10pc Coated HSS in great quality padded carry box Set includes sizes in the chart below We sell single sized woodruff cutters, click here Part Number Cutter Dia Size WIDTH Shank. Gib Head Keys: This type of key is quite similar to the tapered key except for a head which is provided at the bigger end of the key in order to facilitate easy removal of the key. It represents manufacturing practices for. 6x7 2x37xlO 25>01 x 10 16 4 x 65 x 16 4 x 75 x 19 5x65x 16 5x75x19 6 x 9 x 22 6xlOx25 Basic Size 1. Available in many different sizes and thicknesses. Because the keyseat is circular, the key will self-adjust to angled spines. 18. Woodruff Key Slot Cutter and Woodruff Key Seat Cutter. Resource icon. Choose from our selection of 3/16" keys, including over 70 products in a wide range of. 1. Lid Chart. -0. The key on the original VP44 that was on my truck when I bought it new has 3 numbers and an arrow= 036. Summary. Woodruff Key Slot Cutter and Woodruff Key Seat Cutter. C +0. Dimensions of parallel keys and taper keys. 5 302. 1/2" Metric BS4235 Part 1 1977, ISO3912 - 1977, DIN6888 Imperial BS46 Part 1 1958 Keysteel 080M40 (EN8). 2 X 3. Keyway Dimensions. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. Made in USA #808 Standard Woodruff Key. Woodruff keys and keyways. keyways & keys dimension in accordance with BS 4235-1:1972: Specification for metric keys and keyways - Parallel and taper keyswoodruff key chart. Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway (mm) Key (mm)* This standard covers nomenclature, definitions, identification number, dimensions and tolerances of Woodruff Keys and Keyseats. High-Security Key-Actuated Light Switches. 728 in. 6 6. Woodruff Key Cutter Size Chart - Best Picture Of Chart Anyimage. Alloy Woodruff keys normally are made from. They are useful for shaft end. Harvey Tool's Miniature Keyseat Cutters offering is unmatched in the industry, featuring hundreds of specialty sizes and styles. Keys standard metric keyways mechanicalMetric keyway shaft depth reference dimensions diameter iso r773 width Metric woodruff keys are supplied to din 6888 / iso 3912 in c45k keyKeyway metric dimensions keys. 5 mm × 2. Woodruff keys work well near shaft shoulders and on tapered shafts. get the Woodruff Key Depth Chart Pdf colleague that we meet theWoodruff Key part number MS35756-6 NSN 5315-00-616-5514. $0. 5mm (Din 6888)10 x S. Cross References Legal Name. --keyway dimensionsKeyway chart diagram hallite. Big. Part. We have in stock ready-to-use keys in inch and metric sizesThis 3-page chart lists the key size and the actual key dimensions. length, . The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. . com FREE DELIVERY possible on eligible purchases. You have to look for the correct line. We additionally present variant types and also type. Woodruff keys are semicircular, fitting partly into a circular segment keyway with the remainder fitting into a longitudinal slot keyway in the mating part. Machined from 1035 steel, DMR Woodruff Keys (Half Moon Keys) are available from stock in 50 SAE size. The sizes range from the commonly used 1/4, 1/8, 3/16 inch to metric measurements like 3mm, 4mm, 5mm, and larger variations such as 606, 404, and 406 woodruff keys. The Woodruff key slot milling cutter (Figure 4-36) must have the same. Estimated Ship Date: Today. Order Now KW-016-127-CSquare profile Keyseat Cutters, or "Woodruff Cutters," feature solid carbide construction for strength and an AlTiN Coated option for added lubricity and heat resistance. 13. 000 / +0. Results from the CBS Content Network. With the flywheel nut threaded onto the crankshaft, install a flywheel puller so its bolts engage the holes adjacent to the flywheel's hub. Metric standard keyway sizes_联轴器厂家-guangzhou link automation140pcs assortment 30mm keys 16mm x20mm 10mm Sae to metric. thru 3/4 in. Polaris ATV 2004 SPORTSMAN 700 - A04CH68AP-AQ-AU-CU Crankcase & Crankshaft. 202 to 1012 Key No. MPa. 5 1 review Write a Review. DFARS Compliance. 875″ Cut Dia, 0. 50. 5mm 3mm x 7. Back. The. . MSC# 67989525. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application. The circular side of the key is seated into a keyway which is milled in the shaft. Gates belts, hoses, and applications: standard & non-standard shaft keyKey combinations versus key size Small size keys (203-2) – adut plusStandard keyway sizes chart. a) Rectangular sunk key: for preventing rotation of gears and pulleys on the shaft. Pioneer Shaft Keys 839009 Crankshaft Keys, Short Type, 0 degree Offset, Steel, Natural, 0. While this is possible and may save on up-front tooling costs, the results are not optimal. Stanho metric woodruff keys are supplied to DIN 6888 / ISO 3912 in C45k key steel and are made to minus tolerances (h9 on width and h12 on height). Where: τ = Shear Stress S s = Yield Stress of Key T = Torque F = Force D = Shaft Diameter W. Carbide Staggered-Tooth Keyseat End Mills. Woodruff keys work well near shaft shoulders and on tapered shafts. Material: Coating: American Standard #. WOODRUFF KEYS KEYSEATS. As noted above, when selecting a keyway tolerance, there are two common selections in the metric. Keys serve as a fail-safe, or sacrificial, device to ensure that gears are not damaged in the event of jamming; they will break or shear before. 4. You can find a woodruff key size chart in PDF format, which provides a comprehensive reference for selecting the right key for your application.