Asked by: Yongsheng Ibaguirre
business and finance mechanical and industrial engineering industry

What is a footing keyway?

Last Updated: 12th January, 2020

The idea behind footing keyway is to aide the steel reinforcements in resisting the lateral pressure exerted on the base of the foundation walls. By creating notch on the footings such that the new concrete for the foundation walls protrude into the footing interlocking the two elements.

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Similarly, what is a keyway in construction?

Definition. Keyway. A slot formed and poured on a footer or in a foundation wall when another wall will be installed at the slot location. This gives additional strength to the joint/meeting point.

Similarly, what is a keyway and how is it formed? Keyway Families Keyways are formed by milling groves into the key blade creating a final shape. There can be one or more milling groves in a key blade. A key blank can be cut into any number of keyways, but the correct tools are required to achieve more complex keyways.

Keeping this in consideration, what does a keyway do?

Usually the term keyseat is referred as a groove or pocket on a shaft, and a keyway is a slot in a hub in which the key fits Keys and keyways prevent the shaft fron rotating on the bore and can assist in torque transmission between the two connected shafts.

What is a key in concrete?

Construction joints in concrete footings or walls are places where the concrete pour can be stopped so that everything doesn't have to be poured at once. These joints have a "key" formed in them so that when the next batch of concrete is placed, there isn't a flat shear plane across the entire wall thickness.

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What is a keyway joint?

Keyway is used to create a control joint in concrete slabs which helps to eliminate cracking.

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What is a keyway in grading?

“Rough grade” means the stage at which the grade approximately conforms to the approved plans. “Grading” means any excavation or filling or combination thereof. “Keyway” means an excavated trench into competent earth material beneath the toe of a proposed fill slope.

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What does C keyway mean?

C keyway is Schlage's most common key SC1 or SC4 depending on if it's 5 or 6 pin.

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What is a saddle key?

Definition of saddle key. : a key for securing a member to a machine shaft that fits into a keyway in the secured member and is concave to grip the shaft by friction — compare flat key, sunk key.

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What is a Woodruff key used for?

Woodruff Key. Woodruff keys are semicircular shaped, such that, when installed, leave a protruding tab. The keyway in the shaft is a semi-circular pocket, the mating part, a longitudinal slot. They are used to improve the concentricity of the shaft and the mating part, which is critical for high speed operation.

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How do keyed shafts work?

Shafts are mostly used to transmit revolving motion and torque from one point to another point. Keys are used to connect mechanical elements like gears and cams that are mounted on the shaft. They are used for no-slip power. The key prevents rotation between the shaft and the hole.

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What is the effect of keyway cut into the shaft?

The keyway cut into the shaft reduces the load carrying capacity of the shaft. This is due to the stress concentration near the corners of the keyway and reduction in the cross-sectional area of the shaft i.e. the torsional strength of the shaft is reduced.

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How do you remove a keyway from an engine shaft?

Place the assembly over the key, and then thread the bolt into the shaft as far as it will go. Spin the nut downward against the block. Then use a wrench to apply enough force on a nut to remove the key from the shaft. If you apply enough downward movement, the key will be extracted.

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Which key is used for fitting Taper shaft?

Tapered keys are usually used on parallel shafts and Woodruff keys are usually used on tapered shafts.

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How are keyways made?

Shaft and hub keyways are often cut on key seating machines but can also be made using broaching, milling, shaping, slotting EDM. Retention elements such as Splines, flexible couplings, tapered joints etc are also used. If it's very low power transmission, set screws and pins can be used as well.

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What are keys?

A key is a field, or combination of fields, in a database table used to retrieve and sort rows in the table based on certain requirements. Keys are defined to speed up access to data and, in many cases, to create links between different tables.

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Where the circular taper key is used?

The key requires a circular type of key-way in the shaft. It can be used with the tapered shaft because it aligns itself in the seat. The larger depth of key-way prevents the tendency of the key to slip over the shaft, but it weakens the shaft more than that by the use of straight keys.

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What is tangent key?

Tangent Keys. Tangent keys are used in heavy-duty equipment. Tangent keys are actually a pair. These pair of keys are placed right angles to each other and tangent to the surface of the shaft as shown in the fig. each key will withstand the torsion in one direction only.

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What is a key hub?

Keyseat: An axially located rectangular groove in a shaft, hub, or bushing. This may also be referred to as shaft keyseat or hub keyseat or bushing keyseat when describing an exact application. The hub or bushing keyseat can be referred to as a keyway. Keyway: The hub or bushing keyseat.

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How do you remove a key from a pulley?

Method 1 Removing Keys by Hand
  1. Apply penetrating oil. Put this directly onto the pulley and shaft area to loosen any corrosion that will make the pulley hard to move.
  2. Remove the threaded fastener.
  3. Clean the shaft.
  4. Loosen the pulley nut.
  5. Pry off the pulley.
  6. Take out the key.

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What does a keyway look like?

Look at the large end of the key (also called the bow). If the bow has straight sides and a triangle-shaped top (like a house), you probably have a KW1 keyway. If the key is diamond-shaped (narrower at the top and bottom and wide in the middle), you probably have a SC1 keyway.

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What is a Primus key?

The Primus key, with side-bit milling along the key blade, is designed to operate both standard as well as Primus keyways. The Primus system is compatible with Schlage's full line of security locks, easily accommodating upgrades to existing Schlage keying systems.

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Where and why the Woodruff key is used?

Woodruff keys are semicircular shaped, such that, when installed, leave a protruding tab. The keyway in the shaft is a semi-circular pocket, the mating part, a longitudinal slot. They are used to improve the concentricity of the shaft and the mating part, which is critical for high speed operation.

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What is a feather key?

Definition of feather key. in machinery. : a sunk key without taper that is permanently fixed in one of the connected pieces and that is a sliding fit in a keyway in the other so as to permit relative longitudinal motion. — called also spline.