The neck crank: what it is and what happens if you don’t tap
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By Scott Flear, founder of JitsAI.
A neck crank is a spinal lock: instead of squeezing the arteries or the windpipe like a choke, it bends the neck further than it’s built to go. You stay awake while it happens, so there’s no blackout to end it. At IBJJF events a spinal lock without a choke is illegal at every belt, black belt included. Tap early.
What is a neck crank?
A neck crank (or cervical lock) attacks the joints of the neck rather than the blood supply or the airway. The best-known one in Brazilian jiu-jitsu is the can opener, from inside the closed guard. Others, like the twister, bend the neck and the spine together.
The IBJJF illegal-moves table bans a “spinal lock without choke” in every division, including adult brown and black belts in no-gi. Using an illegal hold is a severe foul, and the penalty is disqualification from the match on the spot (IBJJF Rule Book v6, 2024). A choke that also loads the spine is a separate row: illegal up to age 15, legal from 16.
How does a neck crank work?
Like any joint lock: a pivot, a lever and a push. A choke works on the blood or air supply. A crank works on the neck itself.
- The pivot. In the can opener, the attacker’s elbows on your chest are the hinge.
- The lever. Your head is a heavy weight on the end of your neck. Pull it up and forward, chin to chest, and the force goes into the neck.
- What resists it. The muscles and ligaments at the back of the neck stop the head folding forward. A crank stretches them past their range.
A blood choke ends in a blackout, which is why partners are told to let go when someone goes limp. A crank has no such end point: you stay awake, and the load keeps building until you tap or they stop.
Episode 17 of our Anatomy Series explains blood chokes and air chokes. A neck crank is neither: it works on the joints of the neck, not on blood flow or breathing, so it never puts anyone to sleep.
How does the can opener work?
The can opener from inside the closed guard is the classic neck crank. It’s here so you can recognise it. Only drill it where your rules allow it, under a coach, and slowly.
- Step 1: Posture in the closed guard. The attacker kneels in their opponent’s closed guard with a solid base.
- Step 2: Cup the back of the head. Both hands reach behind the opponent’s head and stack or interlace.
- Step 3: Elbows on the chest. The elbows go on the opponent’s chest. They’re the hinge.
- Step 4: Head up and forward, slowly. The hands pull the head up and forward, chin towards chest, a little at a time, and let go the moment the opponent taps.
Common neck crank mistakes
- Treating it like a choke. Waiting to see if you’ll pass out. You won’t. Tap on the pressure.
- Cranking fast. There’s no blackout to warn either of you. Go slowly, or not at all.
- Using it where it’s banned. A pure neck crank gets you disqualified at IBJJF events, whatever your belt. Ask your coach about your gym’s rules before you use one in sparring.
- Turning a choke into a crank. If a guillotine or a rear naked choke slips onto the jaw, pulling harder on the head makes it a crank. Fix the choke instead.
The guillotine and the rear naked choke guides show where the arm should sit so the choke stays a choke.
What happens if you don’t tap to a neck crank?
You stay awake while your neck is bent past its range, and there’s no blackout to stop it. Your neck carries your spinal cord, so this isn’t a joint to test.
We found no published study of neck cranks in grappling (PubMed search, 25 Oct 2026), so we won’t put numbers or an injury list on it. That’s the reason to tap early, not a reason to wait.
How to train around neck cranks safely
- Tap early. Tap on the pressure, not the pain. Don’t wait to see if it turns into a choke.
- Let go on the tap. Release straight away when your partner taps, and never jerk the head.
- Train under a qualified coach. Only drill neck cranks where your rules allow them, under a coach, slowly.
- Get checked if something’s wrong. Seek medical care for neck pain that doesn’t settle, and get urgent help for any numbness, tingling or weakness in your arms or legs after a neck crank.
Are your chokes finishing, or turning into cranks?
A choke that slips onto the jaw stops being a choke. JitsAI scores each technique against a nine-level ladder by partner size and experience, so you can see which of your chokes really finish.
- One Focus a week, with pinned lessons from Henrique Rezende’s 74-lesson fundamentals course.
- A nine-level ladder for every technique, from partners less experienced than you to more experienced ones, each split lighter, same weight and heavier.
- Land it once and it’s a hit; 3 wins across 2 sessions and it’s proven.
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Video transcripts
Transcript: What happens if you don’t tap to a neck crank
What happens if you don't tap to a neck crank? You don't pass out. You stay wide awake while they bend your neck past where it's built to go. A choke cuts off blood or air. A crank just hurts. The classic is the can opener. They kneel in your closed guard, cup the back of your head, and plant their elbows on your chest. Then they pull your head up and forward, chin into your chest. Their elbows are the hinge. Your neck is the tin. Inside your neck, seven little bones hold up a bowling ball. Cup the back, run bungee cords that stop it folding forward. First, the muscles at the back strain. That's the common injury. Keep cranking, and those bungee cords stretch, then can tear. Further still, the little hinges between your neck bones can slip or pop out. A neck fracture from this kind of bend has been reported in jujitsu. Rare, but real. At IBJJF events, a pure neck crank gets you disqualified. Every belt. Even black. No nap to save you. Tap early. Train tomorrow.
Transcript: Blood vs air chokes
Why do blood chokes work fast and air chokes slow? A blood choke squeezes the sides of the neck where the arteries feed the brain. An air choke presses on the windpipe at the front. In one study, experts reviewed 81 chokes on fully resisting, highly trained fighters. Once the choke was locked in, they went unconscious in about 9 seconds on average. Older judo lab studies found similar times. Air is different. Block the windpipe and the oxygen already in your lungs and blood keeps your brain going longer. We couldn't find a good study timing air chokes, so we won't give you a number. Your brain needs a steady blood supply. Cut the supply and it seconds. Cut the air and the tank empties more slowly. Train under supervision. Tap early and let go the moment they tap. Next up, can small beat big?
Neck crank questions
Are neck cranks legal in IBJJF?
Not on their own. A spinal lock without a choke is illegal in every division, adult black belts included, and an illegal hold means disqualification from the match (IBJJF Rule Book v6, 2024).
Is a neck crank a choke?
No. A choke squeezes the arteries or the windpipe. A crank bends the joints of the neck. You don’t pass out from a crank.
What is a can opener in BJJ?
A neck crank from inside the closed guard: the attacker cups the back of the head, plants the elbows on the chest and pulls the head forward, chin to chest.
How do you defend a neck crank?
Stop it starting: deal with the hands behind your head early. Once your neck is bending, tap.
What’s the difference between a neck crank and a guillotine?
A guillotine works on the throat and the sides of the neck. When it slips onto the jaw and the head is pulled, it turns into a crank.
Sources
- IBJJF Rule Book v6 (June 2024): 6.2.3 Severe fouls (p. 28), illegal moves table (p. 29), 7.1 Severe penalties (p. 34). “Spinal lock without choke” is illegal in every division, adult brown and black belt no-gi included; “choke with spinal lock” is illegal for ages 4–15. An illegal hold is a severe foul; a severe technical penalty is summary disqualification from the match.
- PubMed searches run 25 Oct 2026 (the move’s name with jiu-jitsu, grappling or wrestling). “Neck crank” with jiu-jitsu, grappling or wrestling returned nothing.
This page explains a sport technique. It isn’t medical advice.