See all those little torque markings on your components? Use them

See all those little torque markings on your components? Use them

Vehicle mechanics generally have to resort in order to extensive reference manuals to determine the correct torque spec on a particular securer but we’re much luckier – most critical parts now have the specs etched or marked right on all of them so there’s little chance just for error. That is, assuming you pay out them heed.

A spec of 5Nm does not mean ‘snug’ and 15Nm does not translate as ‘tight’, and no matter what you may believe, so-called ‘mechanic’s feel’ can at best only provide a shut approximation of reality. Even the majority of finely calibrated hands are still each imprecise and inconsistent, varying each day, mood and routine of their proprietor.

Torque wrench sorts

Torque hammers remove the guesswork from tightening nails and their wide range of available sorts and costs mean that integrating a single into your home toolbox is now incredibly easy – and strongly recommended, in case you couldn’t tell by now.

So-called ‘clicker’ wrenches like the Park TW-5 and TW-6, Pedro’s Demi-Torque, Effetto Mariposa Giustaforza plus Syntace Torque Tool are the most typical and readily available, operating vian indoor spring mechanism that gives way once the desired torque is achieved. Each fixed-torque and adjustable models are on the market, and Kalnins stresses the particular ‘sweet spot’ for adjustable versions is 30-80 percent of the arranged range. For more specific applications, little (and cheaper) fixed-setting tools like Ritchey’s Torque Key can be experienced.

Proper use and tool care is essential, even though. According to Kalnins, the most common errors are usually continuing to apply force after the ‘click’ or applying torque too quickly (which can lead to overshooting the target), keeping the wrench incorrectly (he states to always use the designated handle) or putting the tool aside in anything other than its cheapest torque setting (which can affect the particular calibration). Used correctly and effectively maintained, though, clickers’ claimed precision of around +/- five % should suffice for most applications.

Home mechanics on a tight budget can still find reasonable accuracy within a simple ‘bending beam’ type of rpm wrench such as Park’s TW-1 plus TW-2. Devoid of mechanical joints, these types of operate on the principle of arranged flex: simply insert the device bit into the fastener, hold the deal with and apply torque until the indication needle moves to the desired value. Twisting beam wrenches are prone to damage when improperly stored (the needle is usually exposed) and improper readings may result if the user isn’t searching straight on at the gauge. Additionally , they’re often quite big plus cumbersome, and ill suited for transportable use.

For well-heeled mechanics, the ultimate rpm wrench is a digital type for example CDI’s Computorq3, which offers a +/- two percent claimed accuracy simply by foregoing mechanical devices for a solid-state electronic force transducer. Most versions include an easy-to-read (and interpret) LCD display that readily converts among various units, too, and in the situation of the Computorq3, a three-stage DIRECTED and audible tone also alerts users when the preset torque can be near. Even more useful, however , is it stores the applied torque, which usually also serves double-duty to train technicians on proper usage. That additional functionality comes at a high cost, though. Suggested retail price within the Computorq3 is over US$500 (approx £330).

CDI’s high-zoot computorq3 torque wrench can be expensive and cumbersome but incredibly accurate and coaches its consumer on proper technique: cdi’s high-zoot computorq3 torque wrench is costly and cumbersome but extremely precise and coaches its user upon proper technique James

The expense of a torque wrench may be higher but it can be a small price to pay for compared to the cost of failure. Take BMC’s Pro Machine SLC01, for example , which usually uses a carbon fibre seatpost grip integrated into the frame structure. The particular torque spec on the lower bolt is just 8Nm and 5Nm over the upper – exceed either of these values by too much and you have basically got yourself a £3, five hundred trainer bike. That’s an extreme illustration, though one we’ve witnessed first-hand (a little too first-hand, within fact).

Other failures can be far less costly but more catastrophic: carbon pubs can break during a sprint, steerer tubes can crack, cranks may come undone. In more fortunate situations, incorrectly torqued parts will fail throughout servicing instead of while on a trip, or items will simply loosen up with no causing a crash. In any event, the unwanted effects can range from merely inconvenient in order to much, much worse.

From a technology standpoint, a lot more rigorous adherence to torque criteria may allow designers to build actually lighter and higher-performance bits later on. “If stricter torque values are usually adhered to, products can be made lighter in weight and lighter yet keep all of the required strength, ” says FSA technical support manager Dae Oh. “Currently, a lot of the overbuilding of items is to survive improper installation. ” 

Put simply, proper torque can mean safer and much more hassle-free riding, cost savings in the long run plus lighter and more reliable parts for everyone. Sounds like a win-win to all of us.

Hydraulic wrenches range from the most common household types to specialty types.Check out the website that specializes in wrenches at for details.

Or contact us

Company Name: Hang Zhou WREN Hydraulic Equipment Manufacturing Co., Ltd.

Address: No. 24, Xingxing Road, Linping, Hang Zhou, China

Tel: +86 571 8811 5720

Fax: 0571-88110210

Postcode: 311100