Industry standards for key sizes in various bores exist for both English and Metric systems. A common standard available from the Mechanical Power Transmission Association is MPTA

Key dimensions: Parallel keys are most commonly used. The key and key seat cross section are ISO standardized. The key length should be less than about 1.5 

Key sizes included: 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm and 6mm. → Keys are tough, heat-treated alloy steel for strength and durability. → Keys fold neatly into handle for easy pocket storage. → Can be used straight out or at an angle for best leverage position. → Durable steel case doubles as a handle for better torque action. Product information

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Not all size values shown in the tables below will be available in all tool lengths, materials, or handle options. Table 1 - Allen™ Wrench/Key Chart for Metric Sizes Common Metric Sizes of Allen™ Keys 1.3 mm 1.5 mm 2 mm 2.5 mm 3 mm 3.5 mm 4 mm 4.5 mm 5 mm 6 mm 7 mm 8 mm 9 mm 10 mm 11 mm 12 mm 14 mm 17 mm 19 mm 22 mm 70 mm 90 mm

2022/1/28 · Nearly every shaft diameter has a corresponding standard keyway width and depth – this calculator helps you find it. While a designer is free to specify any keyway they wish, straying from the standard option is likely to increase the cost, time, and complexity of the part. Many keyways are milled directly into a shaft or broached into the corresponding bored holes.

These dimensions of allen keys can be used to check the accessibility of your bolts were space is limited. For example for an M8 socket head cap screw we need at least 32+8 (head size) = 40mm clearance above the screw for easy accessibility. Refer the following table for metric allen key sizes and dimensions for corresponding socket head cap

11/23 · Ordinarily the round ones take a number 4. The American time strike antique units mostly take the size 7 key. Match your measurements to the Clock key size chart to be sure. 1.75mm = 000 Key. 2.0mm = 00 Key. 2.25mm = 0 Key. 2.5mm =

SAE and metric hex key sets can live together in your tool kit. Last, having SAE & metric hex keys in the United States, you'll find larger metric half sizes of sockets like 3.5 mm aren't standard. However, a 9/64 Allen wrench in mm as an SAE hex wrench works in place of the 3.5 mm wrench. A 3/32 Allen wrench in mm, by comparison, would be 2mm.

DIN-Keys & Keyways to ISO Diameter d in accordance to DIN 6885/1 in Width b 2) Depth h Shaft Keyway Depth t₁ Hub Keyway Depth d = t₂ mm mm mm mm mm mm mm.

Standard metric sizes are defined in ISO 2936: "Assembly tools for screws and nuts—Hexagon socket screw keys", also known as DIN 911, and, measured in millimeters (mm) are: 0.7, 0.9, 1.0, 1.25, 1.3, 1.5

Below are the sizes for a standard keyboard layout as a foundation for other layouts you may encounter. Cap Row Unit Length Stabilizer Esc R1 1u Tab R2 1.5u Caps Lock R3 1.75u Left Shift R4 2.25u Yes (2u) Left Control R4 1.25u Left GUI R4 1.25u Left Alt R4

Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings. All Types. (Page 1 of 2) Key & Keyway Dimensions – Millimeters.

Lastly, please remember that not every metric size has a perfect SAE counterpart. If you need a substitute for a metric size like 9 mm, you're only option might be to get a metric set with that wrench size. In any case, we hope you find this chart helpful and feel free to pass it along to other tool fanatics! View Original Version of Hex Key Chart

11/23 · Ordinarily the round ones take a number 4. The American time strike antique units mostly take the size 7 key. Match your measurements to the Clock key size chart to be sure.

The common specification dimension, Key Size, is highlighted. Metric Standard Parallel Keyway and Key Sizes. Shaft Diameter (mm). Keyway (mm). Key (mm)*.

Metric Standard Parallel Keyway and Key Sizes Shaft Diameter (mm) Keyway (mm) Key (mm)* From To Width (W) Depth (h) Width (W) Depth (T) 6 8 2 1.0 2 2 9 10 3 1.4 3 3 11 12 4 1.8 4 4 13 17 5 2.3 5 5 18 22 6 2.8 6 6 23 30 8 3.3 8 7 31 38 10 3.3 10 8 39 44 12 3.3 12 8 45 50 14 3.8 14 9 51 58 16 4.3 16 10 59 65 18 4.4 18 11 66 75 20 4.9 76 86

Standard Metric Keys & Keyways for Metric Bores with One Key • Couplings (Page 2 of 2) All Types 427-140 Reo a 21 (P eso) oola e el 11 pesees 2 Telepoe 22 a 22 eoo Key & Keyway

Nominal key size b × h Applied shaft diameter d Key size Keyway size; b h c or r Standard size of b1 and b2 b1Tolerance （h9） b2 tolerance （E9） r1 and r2 t1 t2; Standard size Tolerance（h8） Standard size Tolerance(h10) Standard size Tolerance Standard size Tolerance; 4×4: 10 or more and 13 or below: 4: 0 -0.018: 4: 0 -0.048: 0.5: 4

Key and keyway dimensions ; over 290 to 330, 70, 36, 22, 0.3 

education and knowledge, the attached public safety standard is made available to key of Type A, width 12 mm, height 8 mm and length 50 mm shall be.