Choosing blades? Start with our complete rotavator blade guide — L vs C vs J vs straight, steel and hardness compared.
The fastest way to get the wrong rotavator blades is to order by name alone: “send blades for my rotavator.” Rotavators from different makers, and even different widths from the same maker, can use blades with different hole patterns, lengths and bends. A few minutes with a tape measure saves days of returns and a machine standing idle in the season.
This guide shows you how to measure rotavator blades before you order, which numbers matter most, how to measure a worn blade, and what to send so we can match the right BHUMI KING ITALY or OSCAR blade in 30MnCrB5 boron steel at 48–52 HRC. The same method works for super seeder and gyrovator blades.
What you need
- A steel tape or ruler marked in millimetres (a vernier caliper is better for holes and thickness, if you have one).
- A phone camera.
- One clean blade removed from the rotor, plus a note of how many blades of each hand are fitted.
- Your machine make, model and working width (from the nameplate or bill).
Clean mud and rust off the mounting end before measuring. A layer of dried soil can easily add a millimetre or two.
The six measurements that decide fit
1. Hole centre distance
Measure from the centre of one mounting hole to the centre of the other. This is the single most important number: if it does not match your flange, the blade will not fit. If your blade has more than two holes, measure each centre-to-centre gap.
2. Hole diameter
Measure across each hole. It must suit your bolt size with a snug fit. Holes that look oval on an old blade are a sign of wear from loose bolts; measure the narrow side and mention the wear. Our rotavator blade bolts guide covers matching hardware.
3. Thickness
Measure at the mounting end, which wears least. Thickness affects both strength and whether the blade seats properly against the flange.
4. Width
Measure the width of the blade body near the mounting end and, on an unworn blade, near the tip.
5. Overall length
Measure along the straight shank from the mounting end to the start of the bend, then the length of the bent portion. On a new blade, also record the total length tip to end.
6. Profile and bend
Note whether the blade is an L, C or J type, and take a side-on photo to show the bend angle. If you are unsure which profile you have, compare with our L, C and J blade guide.
Left-hand vs right-hand blades
Rotavator rotors carry blades that bend in both directions, arranged in a spiral so the load is shared evenly. Before you strip the rotor, count how many blades bend each way on each flange. When ordering, give the totals by hand. A set with the wrong mix will throw soil unevenly and can make the machine vibrate.
How to measure a worn blade correctly
Most people measure the blade they are replacing, which is already worn. That is fine if you know what to trust:
- Reliable: hole centre distance, thickness at the mounting end, and the general profile.
- Less reliable: overall length, tip width and edge shape, because these are exactly what soil wears away.
- Possibly misleading: hole diameter, if the holes have become oval from running loose.
Tell us the blade is used. If you have a new spare from the original set, measure that instead. If the blade is badly worn, our post on when to replace rotavator blades explains why waiting too long costs more fuel and strains the gearbox.
How to photograph a blade for matching
- Lay the blade flat on a plain floor with the tape measure beside it, running the full length.
- Take one photo from straight above.
- Take a close-up of the mounting end with the tape across the holes.
- Take a side-on photo showing the bend.
- Photograph the machine nameplate if it is readable.
Four clear photos and your numbers are usually enough for us to confirm a match without guesswork.
Common measuring mistakes
- Measuring hole edge to hole edge instead of centre to centre.
- Measuring a muddy or rusted blade, which adds thickness.
- Using inches and millimetres mixed in the same message.
- Ordering one hand only because only one side looked worn.
- Assuming same width means same blade across different rotavator brands.
Why fit and steel both matter
A perfectly fitting blade made from unnamed soft steel will still wear out fast, and a strong blade with the wrong hole pattern will not go on at all. You need both. Every BHUMI KING ITALY and OSCAR blade is made from 30MnCrB5 boron steel heat-treated to 48–52 HRC, then matched to the hole pattern and profile your machine uses. See the range on our products page and the grade details on the steel page.
Frequently asked questions
What measurements do I need to order rotavator blades?
At minimum: hole centre distance, hole diameter, overall length, width, thickness and the profile (L, C or J) with its bend. Add your machine make, model, working width and blade count per rotor. A photo of the blade beside a tape measure helps confirm everything.
Can I measure a worn blade?
Yes, for the mounting end. Holes, thickness and flange area wear the least, so they are the most reliable. Length and edge width shrink with wear, so tell us the blade is used and, if possible, measure an unused spare or check the machine manual.
How do I tell a left-hand blade from a right-hand blade?
Lay the blade flat with the mounting end towards you and the bent tip pointing up. The direction the tip bends tells you the hand. Count how many of each sit on your rotor before you remove them, and keep them grouped while measuring.
What happens if the hole pattern is slightly off?
Even a small mismatch forces the bolt to bear on one side, which loosens the blade, wears the holes and can unbalance the rotor. If the new blade does not line up freely with the flange, stop and check rather than forcing it.
Will you match a blade from just a photo?
Often, yes, if the photo shows the blade flat beside a tape measure plus the mounting end close up. Send it on WhatsApp +91 92160 58340 with your machine model and we will confirm the matching BHUMI KING ITALY or OSCAR blade.
Send your measurements and get a match
Message your six measurements, the left/right count, your machine make and model, and the four photos. We will confirm the matching BHUMI KING ITALY or OSCAR blade and share price and availability. Dealers can send a full model list for a sized stock plan.
WhatsApp: +91 92160 58340. Office: +91 98141 82577. Direct: +91 77107 77077. Email info@shreethakuragri.in or bhumikingitaly@gmail.com, or use the contact page.