Machine-Compatible Dildos

What are machine-compatible dildos?

A machine-compatible dildo has a hollow socket moulded into the base instead of a plain flat bottom. The Vac-U-Lock system from Doc Johnson is the standard: a ridged plug on a machine arm, a harness or a suction cup pushes into the socket and holds the dildo firmly until you pull it off. One dildo can therefore move between a sex machine, a strap-on harness and hands-free suction play. Browse adapters and plugs under machine attachments.

Types of machine-compatible dildos

Realistic Vac-U-Lock dildos

Most of the collection is realistic: Vac-U-Lock Ultraskyn dildos in thin, standard and hung sizes, the Realistic Kong in Firmskyn, the Stryker, the Perfect Erect and Raging Hard-On dildos, the Classic and Crystal Jellies shapes and The Naturals thin dildo. The Realistic Cock Ultraskyn dildos with balls ship with a removable Vac-U-Lock suction cup already attached.

Fantasy Vac-U-Lock dildos

Doc Johnson's silicone fantasy dildos include the Tentacle Traveler, Outer Rim, Red Raider, Green Serpent and Milky Way, and the Celestial Unicorn Horn and Dragon's Tongue glow in the dark.

Squirting and double penetrator dildos

The Doc Johnson Ultraskyn squirting dildo with balls and the Merci dual density squirting dildo each come with a Vac-U-Lock cup and a bulb for warmed lubricant, while the Vac-U-Lock Double Penetrator dildos carry a second slimmer shaft for vaginal and anal penetration at once.

Removable suction cup dildos

Merci The Perfect Dildo, The Perfect P-Spot dildo and the dual density Ultraskyn dildo with an XL removable cup, along with the Kiiroo Vacuum Lock dildo, use the socket to hold a detachable suction cup. Take the cup off and the dildo is ready for a machine or harness plug.

Sets and powered dildos

The Vac-U-Lock dual density starter and experienced sets bundle several Ultraskyn dildos with a harness and plug. The Lovense Gravity thrusts on its own under app control, and the Fetish Fantasy portable sex machine kit arrives with two dildos ready to mount.

How to choose a machine-compatible dildo

Start with the mount you own, then choose the dildo as you would any other.

• Socket: Check that your machine, harness or suction cup uses a Vac-U-Lock style plug. Most machine arms accept it directly or through an adapter.
• Size: Machines thrust with more force than a hand, so choose a size one step below what you use comfortably by hand.
• Material: Ultraskyn and Firmskyn feel lifelike and soft; silicone fantasy dildos are firmer and easier to clean.
• Shape: A smooth, slightly tapered shaft is kindest at speed; heavy texture and double shafts are for people who already know what they like.
• Extras: Squirting dildos and glow-in-the-dark finishes add fun but no extra width.

How to use and care for machine-compatible dildos

Push the dildo fully onto the plug before you start, apply plenty of water-based lubricant to the dildo and your body, and begin at the slowest machine setting. Stop if anything hurts.

• Pull the dildo straight off the plug rather than twisting it, so the socket does not tear.
• Wash before and after every use with warm water and a toy cleaner, and let the socket dry out completely.
• Use water-based lubricant with Ultraskyn and silicone; silicone lubricant can damage soft materials.
• Store Ultraskyn dildos away from other soft toys so the materials do not react.

Machine-compatible dildos for machines, harnesses and solo play

Machine owners get the most from a set of two or three sizes they can swap between sessions. Couples who want the same dildo in a strap-on should pair it with a Vac-U-Lock harness plug; see harness-compatible dildos for flared-base alternatives. For solo play, keep the removable suction cup on and mount the dildo on a smooth surface. Any dildo used anally must stay locked to a plug or cup that is wider than the shaft.