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Topic: Torsion bar

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	Torsion beam suspension - Wikipedia, the free encyclopedia
		One end of a long metal bar is attached firmly to the vehicle chassis; the opposite end terminates in a lever, mounted perpendicular to the bar, that is attached to the axle of the suspension arm or wishbone.
		Vertical motion of the wheel causes the bar to rotate along its axis and is resisted by the bar's torsion resistance.
		Torsion Bar Suspensions are currently used on trucks and SUV's from Ford, GM and Dodge.
	en.wikipedia.org /wiki/Torsion_bar (836 words)

	Torsion bar adjusting device - Patent 4094532
		Generally, the torsion bars are axially aligned extending in directions generally parallel to the rear axes of the rear wheels and spaced ahead of the rear wheels.
		The torsion bars can then be removed from the housing tube 14 and recoupled to the spring plates 20 and 21 in such a manner that when the suspension system is reassembled, there is a pre-twist or bias set into the torsion bars to provide for the greater stiffness of the suepension system.
		The overall degree of adjustment of each of the individual torsion bars as a consequence of varying of the extending ends of the bolts 31 and 32 against the underside of the arms 29 and 30 respectively is limited by the width of the slot 26 and the collar 25.
	www.freepatentsonline.com /4094532.html (2024 words)

	Torsion Bars - Katy Spring Manufacturing
		A torsion bar that is coiled is a spring.
		The rate of a torsion bar is the amount of force produced by the torsion bar when the torsion bar is moved one inch from its free position.
		Example; A torsion bar made of.125” music wire that is 2” long, produces approximately 2.5 pounds of force at 1 inch of deflection has a rate of 2.5 pounds (2.5 pounds of force / 1 inch of deflection = 2.5 pounds per inch).
	www.katyspring.com /torsion-bars/index.html (215 words)

	Mopar G machine series – Torsion bar Tango
		Torsion bar suspensions have been used in everything from sprint cars to tanks over the years, but their use under Chrysler passenger cars during the 1960’s and 1970’s is what interests us g-machine guys.
		A torsion bar is one of the simplest shapes for a spring.
		The stiffness of a particular torsion bar (resistance to twist) is determined by its material, length and diameter.
	www.arengineering.com /articles/tbartango.html (2410 words)

	Toyota Tech: Upgrading Torsion Bars
		In the case of the SAW 25mm bars, this is expressed as: (new bar diameter: 25 to the fourth = 390625) divided by (old bar diameter: 22 to the fourth = 234256), which equates to a 66% increase in spring rate.
		According to Burroughs, the "torsion bars are under high torsional stresses and these stresses are at a maximum at the surface of the minor diameter.
		Prior to installing the new torsion bars, make sure you know which bar is to be installed on the driver side, and which one fits the passenger side: this will be indicated on one end of each bar.
	www.4x4wire.com /toyota/tech/torsion_bars (1968 words)

	torsion bar - Search Results - MSN Encarta
		Torsion, twisting strain produced when a torque is applied to an object.
		For example, torsion is the strain experienced by a length of wire when a...
		Bar, in law, originally, the rail in the English Inns of Court that separated the court officials from the suitors, their advocates, and friends....
	ca.encarta.msn.com /torsion_bar.html (125 words)

	::Offroad-Tech -- GM Torsion Bar 401:: (Site not responding. Last check: 2007-10-02)
		On our GM torsion bars it’s not the type of splines you are used to, like what you would find on an axle shaft, but instead a hexagonal head, similar to a bolt head.
		The fixed end of the torsion bar that is anchored in the torsion bar cross member is anchored into a “key” which can be turned with an adjusting bolt, therefore effecting the resting position of the LCAs and the height of the front of your vehicle.
		The bars are not a plug and play swap though, the bars themselves are indexed differently and there is no way you can load the HD bars with green keys, at least on the GL bars I used.
	www.offroad-tech.com /tech/tb401 (3506 words)

	Mullinator's CRX Tech Tips: Sway-a-Way Torsion Bar Installation (Site not responding. Last check: 2007-10-02)
		The '84-87 CRX uses torsion bars instead of conventional springs for the front suspension.
		The larger hole on the left is the splined opening for the front of the torsion bar.
		Carefully engage the rear of the bar with the splines in the torque tube.
	www.mullinator.com /crx/tech_tbar.html (1716 words)

	torsionbartech
		One advantage of torsion bars is that the ride hieght of a particular vehicle can be easily adjusted.
		Torsion bars are found the Toyota 2 wheel drive pickups.
		The Toyota torsion bar suspension did not die with the introduction of the Tacoma.
	www.brian894x4.com /torsionbartech.html (949 words)

	Torsion Bar Replacement for the 944
		Be warned that torsion bar replacement for a 944 is not a job for the faint of heart.
		Take a look at the torsion tube end caps and note that their are four bolts that fasten it to the tube.
		This effort is aggravated by the fact that you must basically re-assemble the entire rear torsion bar assembly, remount the wheels, then roll the car along enough to settle the suspension before you can take the a valid ride height measurement.
	www.rennlist.com /techarticles/torsionbarreplace.htm (1191 words)

	Project WomBAT - CALMINI Torsion Bar Review - Isuzu/Honda at Off-Road.com
		The torsion bars on Isuzu's pre-'92 Troopers are not terribly firm.
		Unused torsion bars are not side-specific, but used torsion bars take a 'set' and must be installed on the same side, twisting in the same direction, as they were when previously used.
		Fortunately, later adjustments of the torsion bar revealed that articulation gains could be made by lowering the front end back into the normal range of travel, preventing premature maxing out of front suspension's downward travel.
	www.off-road.com /isuzu/wombtbar.html (1533 words)

	Torsion-Bar Springs, Torsion Bar, and Independent Suspension - 4 Wheel and Offroad Magazine
		To understand how a torsion spring works, imagine your chest is the crossmember, your left arm is the torsion bar, and your hand is stuck in the lower A-arm.
		But because the torsion bar is anchored at the other end in the crossmember (just as your arm is anchored in your shoulder) the torsion bar will exert a counterclockwise force to push the A-arm down and hold the truck up.
		Torsion bars have been popular with the OEMs that offer IFS 4x4s because they keep the truck's center of gravity low, leave room for big CV-shafts, and offer the lowest potential unsprung weight of any suspension design.
	www.4wheeloffroad.com /techarticles/131_0306_torsion_bar_springs (772 words)

	Jason's Aspen/Volare Club - Torsion Bars
		The bar is anchored opposite the the affected wheel and runs parallel across the K-member through a "Pivot cushion bushing", turns and continues to the lower control arm.
		Remember that the torsion bars are not interchangeable between sides.
		Remove the torsion bar and anchor assembly from the crossmember.
	www.geocities.com /indychamp/torsion/torsion.htm (275 words)

	Pelican Technical Article: 911 Torsion Bar Replacement
		The smaller bars are oriented to combined street/autox/track use while the big bars would most likely be a harsh ride on real-world streets but provide great handling on the track.
		The front bars are mounted longitudinally inside the a-arm and are removed from the rear.
		If the spring plate is stuck, either use a Visegrip locking pliers to hold torsion bar or you may need to tap the spring plate with a hammer to free itself from the torsion bar splines.
	www.pelicanparts.com /techarticles/911_torsion_bars/911_torsion_bars.htm (1151 words)

	Torsion Bar Height Adjustment (Site not responding. Last check: 2007-10-02)
		Torsion bars have been in use for a long time in many different kinds of cars and trucks.
		A torsion bar is a spring constructed of a steel rod, splined at both ends.
		When the torsion bars have reached the limit of their upward adjustment, the control arms will contact the bumpstops and there will no longer be any available upward travel in the front suspension, only downward.
	www.jimbennett.net /torsionadjustment.htm (661 words)

	Torsion bar adjustment
		The stock torsion bar is 22.8mm, heavy duty bars are available in 24mm and 26mm sizes.
		The torsion bar adjuster bolts are located under the truck near the frame rails about 10" back from the transfer-case cross member.
		After adjusting the torsion bars you may be able to use 32 X 11.50 tires on stock 7" wheels with little or no rubbing.
	www.off-road.com /toyota/tech/torsion (1049 words)

	Torsion Bar Adjustment
		And by "rotating 7 teeth", I mean I turned the torsion bar down 7 teeth on the inside, and the spring plate up 7 teeth on the outside.
		Once you remove the spring plate, paint a mark on the bar and the housing.
		Don't scratch the paint on the bar as it causes rust.
	www.type2.com /library/suspens/torbar.htm (1208 words)

	2003 ALMS Torsion Bar Chassis
		The torsion bar chassis is based on 2 main points....
		and 2) two torsion bars set on the either side of the center pivoit point.....
		With the torsion bar chassis the front wheels are allowed to lift, but the pivoit point lets both the rear tires stay flat on the track giving you better traction and acceleration our the the turns.....
	jbriggsk9.tripod.com /id22.html (800 words)

	Ford Explorer Torsion Bar Lift Add A Leaf Torsion Twist
		This will cause the torsion bars to "settle" and will most likely give you 1.5-1.75" of final lift, which is ideally where you want to be.
		After the rear is lifted and you're content with the new height, be sure to take your vehicle to get an alignment, as you may have altered it after the torsion bar lift.
		The combination of torsion bar lift and add-a-leaf does firm up the ride, but in my opinion improves it and in no way degrades it.
	www.explorer4x4.com /torsionbars.html (525 words)

	Torsion Bar Install
		In other words, the bar stamped 'L' is for the passenger side, and the bar stamped 'R' is for the driver's side.
		It may be easier to slide the torsion bar through the torque tube before you actually get back underneath the car.
		Once the splines in the lower arm are engaged, tap the bar forward until the rear splines engage, then just a bit further to clear the end of the bar past the lower arm.
	www.g1teg.org /howto/torsionbar.html (982 words)

	NissanOffroad.net (Site not responding. Last check: 2007-10-02)
		The author of this article or nissanoffroad.net is in no way suggesting that you should adjust your torsion bars.
		Height increases of approximately 2" can be attained by adjusting the torsion bars but only at the risk of increased wear on suspension and drive train components.
		This will relieve most of the stress being placed on the torsion bars but it is also a good idea to lubricate the the bolts and nuts before turning them.
	www.nissanoffroad.net /how_to/torsion_bars/torsion_bars.asp (386 words)

	Dexter Axle - Trailer Axles and Running Gear Components - Torflex Axles (Site not responding. Last check: 2007-10-02)
		The Torflex axle provides improved suspension characteristics relative to leaf spring axles through the unique arrangement of a steel torsion bar surrounded by four natural rubber cords encased in the main structural member of the axle beam.
		The wheel/hub spindle is attached to a lever, called the torsion arm, which is fastened to the rubber encased bar.
		As load is applied, the bar rotates causing a rolling/compressive resistance in the rubber cords.
	www.dexteraxle.com /torflex_axles (254 words)

	Surly Torsion Bar - GearReview.com
		The Torsion Bar is made for Surly by Nitto of Japan.
		This bar was perfect for my bike, which I had already tuned to the correct handlebar height with my stem.
		The torsion bar gives you the benefits of a wider stance, without adding a bit to the height of the front-end.
	www.gearreview.com /surly_bar.asp (582 words)

	Torsion Bar Suspension (Site not responding. Last check: 2007-10-02)
		Because the angle between the pushrod and bellcrank changes as the suspension moves, the effective lever arm length acting on the torsion bar changes too.
		The following diagram shows one end of a conventional antiroll-type torsion bar mounted longways on a chassis rail and connected to the bellcrank by a simple bracket.
		Note that the pivot axis of the bellcrank and the torsional axis of the bar are in line.
	members.optusnet.com.au /gecko/automotive/TorsionBar.html (495 words)

	Minutemod: Cranking the Torsion Bars
		The torsion bar's job is to maintain downward pressure on the lower control arm.
		The torsion bar is splined on one end, and fits into the lower control arm.
		The height of the lower arm is controlled by an adjusting bolt, which pushes down on the anchor arm, and twists the torsion bar.
	www.4x4wire.com /mitsubishi/tech/minutemods/torsion_bar (739 words)

	Calculating Spring Rate, Torsion bar - Pirate4x4.Com Bulletin Board
		Torsion bars are not progressive rate, in the equation you are using, you have that rate when load is perpendicular to the arm, as the arm goes through it's angular travel, the rate at the end of the arm changes because the effective length of the arm is changing.
		When calculating the rate of a bar, you need to use the active length of the bar, which does not include the splines and about half the transition area between the spline and the minor diameter of the bar.
		What you are trying to make is possible, but you are limited to the travel of that toyota torsion bar, any more and that bar will sag.
	www.pirate4x4.com /forum/showthread.php?t=181342 (1197 words)

	Automotive suspension engineering - Torsion bar or Coil Spring?
		You should be interested in determining the maximum load a circular bar is capable of sustaining, the stresses in the bar as well as the deformation or twist of the bar.
		Consider a small element abcd of length dx within the elemental segment of the bar, the magnitude of shear strain, g, is given by where r is the radius of the circular bar and df is the angle of rotation of one cross-section with respect to another.
		The torsional flexibility is the reciprocal of the torsional stiffness and is defined as the angle of rotation required to produce a unit torque.
	www.eng-tips.com /viewthread.cfm?qid=37029 (941 words)

	Cavendish experiment - Wikipedia, the free encyclopedia
		In physics, the Cavendish experiment was the first experiment to accurately measure the gravitational constant by measuring the force of gravity between two masses in the laboratory.
		The experiment was originally proposed by John Michell, who constructed a torsion balance apparatus, but Michell died without completing the experiment.
		From the twisting force in the wire and the known masses of the spheres, Cavendish was able to calculate the value of the gravitational constant.
	en.wikipedia.org /wiki/Torsion_bar_experiment (417 words)

	Digital Torsion Bar Tester, 48"
		The industry's first tester that can accuratly rate a torsion bar.
		Digitally measures twist of torsion bars to +/-25 degrees, & measures force at a specific degree of twist to 2,000 ft-lbs.
		Works with bars 18"-48" in length and splines 7/8" to 2 1/2" in diameter.
	www.intercomp-racing.com /detail.cfm?ItemID=136 (54 words)

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