In a clockwise direction.
EDIT:
an easy way to remember which direction to twist is: Lefty Loosey, Righty Tighty
Exactly the same as any other nut. Spanner is just British terminology for wrench.
How to calculate spanner size regarding bolts and nuts
you use a spanner to open a rusted nut bolt because you need a strong tool to open a rusted nut bolt.
Because a spanner provides extra leverage - and is much tougher than our fingers !
because spanner has a longer moment arm and torque depends upon moment arm greater the moment greater will be the torque produced so it is easy to unscrew a tight nut using longer spanner
A spanner nut is a type of fastener that has a specific design allowing it to be tightened or loosened using a spanner, or wrench. It typically features a unique shape, such as holes or notches, which require a corresponding tool for manipulation. Spanner nuts are commonly used in applications where secure fastening is critical, such as in machinery or automotive components, to prevent unauthorized access or accidental loosening.
To remove a spanner lock-nut on a front hub, first ensure the wheel is securely removed from the bike. Use a spanner tool that fits the notches of the lock-nut, and turn it counterclockwise to loosen it. You may need to hold the axle still with another tool or your hand to prevent it from spinning. Once loose, you can unscrew it completely by hand.
The mechanic would get more leverage. The rotational force applied to the nut is greater the longer the spanner, assuming the mechanic applies the same amount of force.
Is it heavy duty model with axle bolts? If so, Remove axle bolts Slide axle out of differential housing use spanner wrench to loosen spanner nut (or hammer and chisel) Remove spanner nut and seal Drum should slide off
The amount you should tighten a spanner nut depends on the specific application and the materials involved. Generally, it should be tightened firmly but not excessively to avoid damaging the nut or bolt. A good practice is to follow manufacturer specifications if available, or to use a torque wrench to apply the recommended torque. When in doubt, ensure the nut is snug and secure, but be cautious not to overtighten.
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.
A long-arm spanner provides greater leverage, making it easier to apply more force to the nut with less effort. This increased leverage allows the user to generate more torque, which makes it easier to tighten the nut effectively. Conversely, a short-arm spanner provides less leverage, requiring more effort to generate the same amount of torque.