Curb chain

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A curb chain for a western-style bit Westerncurbchain.jpg
A curb chain for a western-style bit
An English-style curb chain CurbChain.jpg
An English-style curb chain

A curb chain, or curb strap, is a piece of horse tack required for proper use on any type of curb bit. It is a flat linked chain or flat strap that runs under the chin groove of the horse, between the bit shank's purchase arms. It has a buckle or hook attachment and English designs have a "fly link" in the middle to hold a lip strap. On English bridles the horse is bridled with the curb chain undone on one side, then connected once on the horse. On western bridles, the curb chain is kept buckled to both sides of the bit.

Contents

Action

A curb strap on a Western style curb bit SweetIronCurb.jpg
A curb strap on a Western style curb bit
A curb chain on a Pelham bit Pelham bit.jpg
A curb chain on a Pelham bit

The main use of the curb chain is to enhance and control the lever action of a curb bit. Additionally, it helps to keep the bit steady and in place within the mouth. On English pelham and double bridles the curb chin is attached by a ring ("fly link" (UK)) to a lip strap, which helps keep the lip strap in place while the lip strap in turn prevents the curb chain from being lost if it becomes unhooked.

The curb chain applies pressure to the curb groove under a horse's chin when the curb rein of the bit is used. When the curb rein is pulled, the shank of the bit rotates back towards the chest of the horse and the cheek (upper shank) of the bit rotates forward (since it is a lever arm). The curb chain is attached to the rings at the end of the cheek, so, as the cheek moves forward, the chain is pulled and tightened in the curb groove. Once it comes in contact with the curb groove of the horse it acts as a fulcrum, causing the cannons of the bit mouthpiece to push down onto the horse's bars, thus amplifying the bit's pressure on the bars of the horse's mouth.

Adjustment

The tightness of the curb chain has a great effect on the action of the bit. If used with no or a loose curb chain, it allows the shanks to rotate more before the curb chain is tight enough to act as a fulcrum and exert pressure. This extra rotation can warn the horse before pressure is exerted on his mouth, so he may respond beforehand. Conversely, a very loose curb chain can be undesirable, allowing the bit to rotate in the mouth too much, causing the port, especially a high port, to become too vertical and press against the palate, which is painful, can damage the mouth in extreme cases, and can cause the horse to gape. Additionally, it can completely nullify the correct action of the curb, making its use pointless.

There are two undesirable consequences when using a very tight curb chain. First, the bit immediately exerts curb pressure and increased pressure on the bars as soon as pressure is applied to the reins. Therefore, a tight curb chain is much harsher, and provides less finesse in signaling the horse than a looser curb chain would, as the horse is never given a chance to respond before the curb chain engages. Secondly, an extremely tight curb chain causes the mouthpiece to constantly push down on the sensitive tongue, never allowing the horse relief.

A curb chain is generally adjusted so it comes into action when the shank rotates 45 degrees back. However, skilled riders with experience with the curb bit may adjust the chain tighter to accommodate the needs of the individual horse, type of equipment, and training situation. However, keeping the curb chain looser allows more accommodation for rider error.

The curb chain should be applied by twisting it clockwise on one hook until it is flat, and then attaching it to the other hook. A twisted curb chain is far harsher in its effect than a flat one.

Differences in chains

Curb chains vary in width and linkage. Thinner curb chains are more severe, ones that are too thin are banned in competition, and any curb chain could cause sores if the chain is not adjusted properly and used with discretion. For horses that are sensitive or that are rubbed by the chain, a cover made of rubber, neoprene, leather, or gel can be used, or a leather curb strap. However, it is important that the rider check that the curb is being used correctly and is not the cause of the rubs.

Related Research Articles

Tack is equipment or accessories equipped on horses and other equines in the course of their use as domesticated animals. This equipment includes such items as saddles, stirrups, bridles, halters, reins, bits, and harnesses. Equipping a horse is often referred to as tacking up. A room to store such equipment, usually near or in a stable, is a tack room.

Bridle Piece of equipment used to direct a horse

A bridle is a piece of equipment used to direct a horse. As defined in the Oxford English Dictionary, the "bridle" includes both the headstall that holds a bit that goes in the mouth of a horse, and the reins that are attached to the bit.

A halter or headcollar is headgear that is used to lead or tie up livestock and, occasionally, other animals; it fits behind the ears, and around the muzzle. To handle the animal, usually a lead rope is attached. On smaller animals, such as dogs, a leash is attached to the halter.

Longeing Technique for training and exercising horses.

Longeing or lungeing is a technique for training and exercising horses. It is also a critical component of the sport of equestrian vaulting.

Noseband

A noseband is the part of a horse's bridle that encircles the nose and jaw of the horse. In English riding, where the noseband is separately attached to its own headstall or crownpiece, held independently of the bit, it is often called a cavesson or caveson noseband. In other styles of riding, a simple noseband is sometimes attached directly to the same headstall as the bit.

Pelham bit

A pelham bit is a type of bit used when riding a horse. It has elements of both a curb bit and a snaffle bit. In this respect a pelham bit functions similar to a double bridle, and like a double bridle it normally has "double" reins: a set of curb reins and a set of snaffle reins. Because it has a bit shank and can exert curb-style pressure on the horse, it is considered a curb bit. Like all curb bits, a pelham bit has a mouthpiece, shanks with both purchase and lever arms, a ring for rein attachment at the bottom of the shank, and a curb chain. But like a snaffle bit, a pelham bit also has a bit ring on either side of the mouthpiece. Like some curb bits, a pelham bit usually has "loose" shanks - hinged at the mouthpiece in the same way that the rings of a snaffle bit are hinged. When two sets of reins are used, the snaffle rein generally is wider, to help distinguish it from the curb. A "cowboy pelham" is a western style of loose-jawed curb bit with additional rings at the mouthpiece allowing a second set of reins to be added.

Snaffle bit Type of horse equipment that goes in the horses mouth

A snaffle bit is the most common type of bit used while riding horses. It consists of a bit mouthpiece with a ring on either side and acts with direct pressure. A bridle utilizing only a snaffle bit is often called a "snaffle bridle", particularly in the English riding disciplines. A bridle that carries two bits, a curb bit and a snaffle, or "bradoon", is called a double bridle.

Kimblewick bit

A Kimblewick, Kimberwicke or Kimberwick is a type of bit used on a horse, and named after the English town of Kimblewick where it was first made. The bit has bit shanks, D-shaped rings, and a curb chain. Due to its shanks, it is regarded as a type of curb bit. The curb action is minimal to mild, however, because the shanks have short purchase arms and no lever arms. Some variations increase the curb action. A Kimblewick is used with one set of reins.

Curb bit

A curb bit is a type of bit used for riding horses that uses lever action. It includes the pelham bit and the Weymouth curb along with the traditional "curb bit" used mainly by Western riders.

Double bridle

A double bridle, also called a full bridle or Weymouth bridle, is a bridle that has two bits and four reins. One bit is the bradoon, is a modified snaffle bit that is smaller in diameter and has smaller bit rings than a traditional snaffle, and it is adjusted so that it sits above and behind the other bit, a curb bit. Another term for this combination of curb and snaffle bit is a "bit and bradoon", where the word "bit" in this particular context refers to the curb.

Gag bit

The gag bit is a type of bit for a horse. Because the cheek piece and reins attach to different rings there is leverage action. Severity of leverage action depends on where the reins attach. For example, in a Dutch Gag, the further the rein attachment from the mouthpiece the greater the leverage. The gag bit is related to a Pelham bit and a double bridle but the gag bit has no curb strap.

Hackamore

A hackamore is a type of animal headgear which does not have a bit. Instead, it has a special type of noseband that works on pressure points on the face, nose, and chin. Hackamores are most often seen in western riding and other styles of riding derived from Spanish traditions, and are occasionally seen in some English riding disciplines such as show jumping and the stadium phase of eventing. Various hackamore designs are also popular for endurance riding. While usually used to start young horses, they are often seen on mature horses with dental issues that make bit use painful, and on horses with mouth or tongue injuries that would be aggravated by a bit. Some riders also like to use them in the winter to avoid putting a frozen metal bit into a horse's mouth.

Bit shank

The bit shank is the side piece or cheekpiece of a curb bit, part of the bridle, used when riding on horses. The bit shank allows leverage to be added to the pressure of the rider's hands on the bit. Shanks are usually made of metal, may be straight or curved, and may be decorated in some disciplines. The headstall and curb chain or curb strap of the bridle is attached to the top of the shank, and the reins are attached at the bottom. Shanked curb bits are used in western riding for nearly all adult horses, and are seen in English riding disciplines primarily as part of the double bridle used by advanced dressage riders, and on the hybrid pelham bit that includes a ring for a second rein attached at the bit mouthpiece.

Mechanical hackamore Variety of bitless horse headgear

A mechanical hackamore is a piece of horse tack that is a type of bitless headgear for horses where the reins connect to shanks placed between a noseband and a curb chain. Other names include "hackamore bit", "brockamore", "English hackamore", "nose bridle" and "German hackamore". Certain designs have been called "Blair's Pattern" and the "W. S. Bitless Pelham".

Bit ring

The bit ring is the ring on the side of a horse's bit, particularly on a snaffle bit. It is used as a point of attachment for the cheekpieces of the bridle and for the reins. It also has an effect on the action of the bit. Therefore, the design of the ring is something to consider when choosing a bit for a horse, even though the bit mouthpiece generally has a greater effect than the ring.

Bit mouthpiece

The mouthpiece is the part of a horse's bit that goes into the mouth of a horse, resting on the bars of the mouth in the sensitive interdental space where there are no teeth. The mouthpiece is possibly the most important determinant in the severity and action of the bit. Some mouthpieces are not allowed in dressage competition.

Bit (horse) Horse equipment that fits in the mouth and is used to direct the horse

The bit is an item of a horse's tack. It usually refers to the assembly of components that contacts and controls the horses mouth, and includes the shanks, rings, cheekpads and mullen, all described here below, but it also sometimes simply refers to the mullen, the piece that fits inside the horse's mouth. The mullen extends across the horse's mouth and rests on the bars, the region between the incisors and molars where there are no teeth. The bit is located on the horse's head by the headstall, and which has itself several components to allow the most comfortable adjustment of bit location and control.

Horse harness is a device that connects a horse to a vehicle or another type of load.

Bitless bridle Type of horse equipment

A bitless bridle is a general term describing a wide range of headgear for horses or other animals that controls the animal without using a bit. Direction control may also be via a noseband or cavesson, if one is used. The term hackamore is the most historically accurate word for most common forms of bitless headgear. However, some modern bitless designs of horse headgear lack the heavy noseband of a true hackamore and instead use straps that tighten around a horse's head to apply pressure in various ways. These are often specifically patented and marketed as "bitless bridles", usually referencing a particular type of headgear known as the cross-under, though other designs are sometimes also given similar names.

Lip strap

A lip strap is a piece of horse tack made of rolled leather or occasionally thin chain, used sometimes on some types of English-style curb and pelham bits. The lip strap runs between the bit shanks and passes through a special center ring on a curb chain sometimes called the "fly link". The lip strap attaches to rings at midpoint of the shanks and buckles on the near side.

References

Price, Steven D., ed.The Whole Horse Catalogue. New York: Simon and Schuster/Brigadore Press, 1977