on the rear axle housing, sprocket side, there should be a large spanner nut. Loosen the two bolts that tighten the rear axle in the housing and turn that spanner nut. Not sure which direction, you should be able to figure that out.
The spanner is the tool that is sometimes called nut driver. The main function of this tol is to tighten or loosen nuts and bolts. There are different sizes of nut drivers.
The longer the arm of a spanner, the more leverage can be used. More leverage allows more pressure to be used against a nut to either tighten or to loosen.
20 Nm. You just multiply them together.
Because a spanner provides extra leverage - and is much tougher than our fingers !
The longer handle gives you more leverage. You use Force to push or pull an object in an attempt to make it move. When you want to cause something to rotate (tighten or loosen a nut for example), you need Torque. Torque = the force you apply to your spanner times the distance your hand is from the nut you are trying to turn. Thus, if you have a longer spanner, you can place your hand farther from the nut and the Torque on the nut will increase. You have to be careful about long handled wrenches or slipping a piece of pipe over a wrench to make it longer as you can generate so much Torque that you can snap the bolt clean off or strip the threads. If you have to tighten a nut/bolt very firmly, but don't want to strip/snap it, you can use a Torque Wrench. It has a gauge that tells you how much Torque you are applying to the nut/bolt so that you can tighten it to specifications without going over.
Exactly the same as any other nut. Spanner is just British terminology for wrench.
To tighten bolts and nuts
How to calculate spanner size regarding bolts and nuts
Remove side covers on rear ashtray and lift out unit. The adjustment nut needs a 10mm spanner. Just about take up any slack when handbrake is off. Don't over tighten.
you use a spanner to open a rusted nut bolt because you need a strong tool to open a rusted nut bolt.
spanner or a torque wrench