does the cylinder and wheels of reel mower rotate at the same speed

No it’s not, The reel or blade usually spins faster than the wheels, usually about twice the speed of the wheels while some other brands is three time the speed of the wheels depending of the brand.

Remember that the overall speed of the reel and wheel is still depends on your overall effort.

How does the reel spins faster than the wheels

Source: HowStuffWorks.com

A reel or cylinder of a reel mower spins using a set of gears, Two pinion gears that was connected to the reel, one on both end and a ring gear that is connected to the wheels.

These gears have different number of tooth and the difference of of these number is what makes the reel spins faster than the wheels.

The difference of the number of gear tooth is called the GEAR RATIO. Most hand push reel mower have a gear ratio of 1:4 which means in every one turn of the wheels the reel spins four times.

Gear ratio’s can change depending on the manufacturer’s design, but whatever the gear ration is you will still be sure that the reel will always spins faster than the wheels because that’s the main concept here.

For a hand push reel mower to be effective it needs the reel to spin fater than the wheels otherwise it’s useless.

That’s why with these design you don’t need to put too much effort to be able to cut the grass.

How Fast The Reel Spins

How to adjust the blades of a reel mower

Adjusting the blades of a reel mower is a common task that we always did in our reel mowers, different brands come in different ways in adjusting the blades, but one thing is most of them in common, they always aim to adjust the knife blade clearance to the reel.

Some blade adjusters is spring loaded  for quick blade movement response

To adjust the blades loosen the nut that locks the knife blade so it can go up or down when turning the adjusting knob. There are two adjusting knob or nut on all reel mowers located on both sides of the mower.

Some brands use adjusting screw while some other uses adjusting knob.

Both end of the knife blade should have the same contact pressure on the reel, not too tight no too lose.

too lose adjustment will cause the blade to not cut and too tight adjustment can make the reel hard to rotate and can overheat and worn the blades quickly.

A piece of paper can be use to check the sharpness of the blades, slowly rotate the reel by hand and see if it cuts the paper across the entire blade area.

If there is a spot that’s not been cutting or if the blades are already tight and still not cutting then that’s the time that the blades need to be sharpen.

What if the blades wont move when attempting to adjust

The main reason that the blades won’t move if you attempt to adjust it is if you forgot to loosen the lock nut on the side that locks the knife blade.

The second reason is if the adjusting knob or adjusting screw is rusted and hard to move. If this is the problem then the adjusting knob or screw needs to be removed first and fix or put a new one.

Different Methods of Sharpening a Reel Or Cylinder mower

Every time you use your reel mower the blades wear out and start to become dull and losses performance that’s why the blades of a reel mower need to be properly adjusted and sharpen regularly.

how does the blade of a reel mower losses sharpness

When you’re using the reel mower, the cylinder or reel spins at high speed and while it spins its blades is constantly passes the knife blade or bottom blade. The continued passing of the reel to the knife blade creates friction because of the high-speed scissor-like cutting action that it’s making and that friction is what wears the blades down.

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The two blade needs to be adjusted firmly and check for cutting effectiveness using a piece of paper when you spin the reel by hand and the paper is smoothly cut then it should be alright, A firm adjustment is necessary to avoid too much friction that generates heat and worn’s the blades.

On hand push reel mower the blades do not really heat up too much because the speed of the reel is depending on you, on your speed of pushing the reel.

While on a motor driven reel mower the blades rotate very fast that it can heat up very quickly so its necessary to spray a lubricant or WD40 on the blades if you want to engage the blades without cutting.

When you’re on the cutting process you don’t need to spray lubricant on the blades because the grass itself is wet which provides lubrication to the blades.

Remember that both blades need to be sharper at the same time.

There are 3 ways on how you can sharpen your reel or cylinder, The first one is by using a grinding compound which is the most common one, the second one is by using a sharpening stone which is also a cheap choice but I don’t really recommend this one because of the possibility of an uneven grind surface, And the third one is by using a surface grinder which is more expensive and the people who use this kind of grinding are the lawn mower service center, this type of grinding can grind big reels up to 36″ that’s why contractors are the most common customers of this grinding method.

  1. Using a Grinding Compound

This method is commonly known as Backlapping and is done by putting grinding compound all over the reel blades and spinning the reel in reverse and while it spins the grinding compound is the one doing the job of sharpening the blade.

You can do this method a few times until you get your desired finish, remember to adjust the blades while repeating the process in that way you’ll be able to wear the blade faster and get the desired sharpness.

You can also use a hand drill to make the grinding faster this is done by using an adaptor that you can fit in the hand drill and the other end can fit a socket to drive the reel.

Watch this video of how cylinder back-lapping is done https://www.youtube.com/watch?v=mu0WLtrBMd8

Grinding compounds usually comes with the reel mower when you buy a new one on some brands or as an additional package when you buy it on Amazon, but if you want to save some cash you can just use a tube of grinding compound that we use to grind the valves on a 4 stroke engine.

2.Using a Sharpening Stone

Only a few people use this kind of method only those who don’t want to spend a few bucks and just want to grass the grass no matter what.

A sharpening stone is similar to those what we used to sharpen kitchen knives the old fashion way. Some people still find method this effective and still able to the job but.

If you want to try this sharpening method the best technique is to place the stone in one position that lightly touches the blade then spins the blade by hand one s4ection at a time until the entire blade is sharpened.

3. Using a Surface Grinder

Sharpening with a surface grinder is the professional method of sharpening a reel or cylinder, this method is usually applicable to big reel’s or cylinder and on this method, the knife blade is being ground separately.

The reel is being ground on bearing surface which means the housing where the bearing is seated is bolted on the grinder bed and is being rotated by an induction motor using a connected drive shaft.

The knife blade usually has a separate surface grinder and it’s being grinded on two positions, the front, and the top, this will create a sharp edge on the blade. 

Watch this video showing a reel or cylinder being grind on a surface grinder https://www.youtube.com/watch?v=Rv8A66ZCsIk

 

Grinding a Reel or Cylinder on a Surface Grinder
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