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Grover Roto-Grip Locking Rotomatics 18:1 3+3 Machine Heads - Chrome 509C


3 treble and 3 bass, set of 6

Grover Roto-Grip Locking Rotomatics 18:1 3+3 Machine Heads - Chrome 509C


3 treble and 3 bass, set of 6.

The Grover 509 Series Roto-Grip Locking Rotomatics, are the perfect choice for rapid and convenient string changing, whilst also a blessing for virtuoso vibrato guitar players. 

The rear thumbscrew mechanism locks and secures the string, eliminating multiple windings around the string post, for stable tuning, whilst ensuring accurate return to zero pitch even after the deepest vibrato bends. 

Constructed from stamped metal and with their distinctive 3-step button design, the Grover Roto-Grip Locking Rotomatic machine heads, feature precision engineered worm and gear components to eliminate string slippage. 

Roto-Grip Locking Rotomatics® utilise the famous 18:1 Rotomatic® design with a “thumb screw” mechanism that locks the string into place. Insert the string through the post hole, wrap around once, then lock by tightening with the thumbscrew. The housing itself is self-lubricating, for a lifetime of trouble-free service.

Perfect replacement for the most standard machine heads. Includes all mounting hardware.

For detailed specifications and/or fitting guides please locate this item on the Grover website where they offer more detailed information.


Grover are recognised worldwide as industry leaders for high-quality replacement machine heads, bridges and more for electric, acoustic, bass guitars and folk instruments.


SKU 509C
Brand Grover


How much is delivery?
At Ivor Mairants Musicentre we offer thousands of products that are currently in stock and can be delivered to your home address, anywhere in mainland UK. You will be able to see your delivery charge at the "Checkout" page.

Do you offer Next Day Delivery?
Yes, we offer a Next Day Delivery service for in-stock orders placed before 1pm Monday-Friday. Next Day Delivery and Saturday Delivery carries an extra charge. Ivor Mairants Musicentre commit to delivering on time, we rely however, on our carriers to fulfil their contract in this regard, and can not be held liable for any failure of third parties in fulfilling delivery expectations.

Can I change my delivery address after I have placed my order?
Once you have placed your order with us, we are unable to change any of the information you have given us, as most orders are dispatched from our distribution warehouse. Our contract carriers however offer various levels of free of charge enhanced service such as DPD PREDICT, which allows the consignee to be alerted by e-mail and/or text message of the delivery window and allows for changes allowed by the contract carrier to the detail of the actual delivery time and/or location. Where such services are available all orders will benefit from auto enrolment in the services. Ultimately, if there is no-one to sign for your delivery, you will be left a card by our contract carrier inviting you to collect from the depot or re-arrange delivery.

If it proves impossible to deliver your goods within the time allowed by our contract carriers, the consignment will be returned to us and you will unfortunately become liable for all redelivery, and/or redirection charges. Please check your confirmation email for the status of your goods before contacting us. Should you need to change your details, for example you have moved house, you can change your details by email at info@ivormairants.co.uk and the new information will be updated within 24 hours. Please note that any orders placed before changes are made will use your old details.

Can I track my order?
The vast majority of our UK and Eire domestic consignments and international shipments are by trackable service. You will be emailed a tracking number with your dispatch information. Please note that tracking numbers are not used for smaller orders sent by Royal Mail or similar postal service. If you require your order to be consigned using a trackable service, please advise us AT THE POINT OF ORDER.


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