HiSmith Sex Machine for Anal Play: Best Attachments, Settings and Positions

Why Anal Requires a Different Approach Than Vaginal Use

An anal sex machine in Australia is not a niche purchase — it is one of the more common reasons people buy a sex machine in the first place. But the setup matters more here than with vaginal use, because the anatomy is less forgiving and the margin for error is narrower. For more, see our Pleasing Strings: Australia's Sex Machine Specialists. For more, see our HiSmith Sex Machine Speed and Stroke Settings Explained: Getting th....

The rectum produces zero natural lubrication. Its resting depth is roughly 10–15 cm (4–6 inches), extending to around 20 cm with arousal and relaxation. It curves posteriorly, meaning a rigid straight toy driven by a motor can cause genuine discomfort — or worse — if you get the angle or depth wrong. A machine does not feel resistance the way a hand does. It just keeps going.

None of that means machines are unsafe for anal play. It means you need to be deliberate about three things: the attachment you choose, the stroke settings you dial in, and the position you use. Get those right and a machine can deliver something hands or manual toys simply cannot — consistent, tireless, hands-free stimulation at exactly the pace you want.

HiSmith Anal Attachments: What We Stock and How They Differ

HiSmith's KlicLok system is their proprietary quick-release connector — attachments snap on and off the machine's drive rod without any tools. Every anal attachment we carry uses KlicLok, so they are compatible across the HiSmith machine range. If you need a primer on how KlicLok works and what fits what, we covered that in our KlicLok compatibility guide.

We currently stock three KlicLok-compatible anal attachments. Here is how they break down:

The Silicone Slim Attachments — Start Here

Both silicone slim options sit in the beginner-to-intermediate diameter range (roughly 2–3.2 cm / 0.75–1.25 inches). That is the right zone for anyone who has not used a machine anally before, and frankly, it is where most regular users stay. Bigger is not better when a motor is doing the work — the consistent repetition of a machine amplifies sensation well beyond what you would get thrusting manually.

Silicone flexes with your body. Because the rectum curves, a flexible attachment bends into the natural angle rather than fighting it. That matters more at machine speeds than it does with a handheld toy. These are the attachments I would point anyone toward first.

The tradeoff: silicone-based lubricant will damage silicone toys over time. You need water-based lube, no exceptions. We stock a range on our lubricants page — for anal machine use, look for thicker water-based formulas that do not dry out as quickly.

The 8.2" Aluminium Beaded Dildo — Not a Beginner Piece

This is a distinctly different experience. Aluminium is completely rigid, temperature-responsive, and has a beaded profile that creates pronounced sensation on each stroke. The 8.2-inch length puts it well past beginner territory — most people starting out should stay at 5–7 inches of insertable length maximum, and even that needs to be moderated by stroke depth settings on the machine.

Rigid aluminium does not follow the posterior curve of the rectum the way silicone does. That means slower speeds, more careful positioning, and a thorough warm-up are non-negotiable. If you are experienced with anal depth play and want something that feels different from silicone, this is a genuinely interesting option. If you are still building confidence, park it for later.

One advantage: aluminium is compatible with any lubricant type, including silicone-based lubes, which tend to last longer and require less reapplication. That is a practical benefit during extended machine sessions. You can browse our full anal toy range for other options as well.

Anal Sex Machine Settings: Stroke Depth and Speed

Start at the absolute lowest speed your machine offers and leave the stroke depth as shallow as it will go. This is not timid — it is intelligent. A machine delivers force consistently, and the anal sphincter needs time to relax before accepting repetitive thrusting.

Speed

Consumer sex machines typically range from 0 to 300 strokes per minute. For anal play, especially in the first 10–15 minutes, stay below 60–80 strokes per minute. Many experienced users find their comfortable cruising speed sits around 80–150 spm for anal — well below what the machine can do. The maximum speed exists. That does not mean you should use it.

HiSmith's servo motor machines deliver more consistent torque at low speeds compared to the DC motor entry-level models. If you primarily plan to use your machine for anal play, this matters — a motor that lurches or stalls at low speed is a poor fit for anal, where control is everything. We detailed the differences between entry-level and premium machines in our HiSmith buyer's guide.

Stroke Depth

Typical consumer sex machine stroke depth sits between 3–7 cm. For anal, the key thing to understand is that stroke depth compounds with insertion depth. If you have 10 cm of the attachment inside you and the machine is stroking 5 cm, the tip is travelling between 5 cm and 10 cm depth on every cycle. At higher speeds, your body has fractions of a second to accommodate each thrust.

Set the stroke depth conservatively — 2–3 cm is plenty to start with. You can increase over the session as your body relaxes. If your machine model has adjustable stroke depth (mid-range and premium HiSmith models generally do), use that feature. If you are on a fixed-stroke-depth entry model, control effective depth by adjusting your distance from the machine instead.

Positions That Actually Work for Anal Machine Play

The limiting factor with machine positions is not flexibility or preference — it is access to the speed control. You need to be able to reach the dial or remote at all times. If you cannot slow down or stop the machine instantly, the position is not safe for anal use. Full stop.

Doggy / All Fours

Machine placed behind you on the floor or a low platform. This is the most common position because it gives a natural angle for anal entry and keeps the machine stable. Your arms are free to reach behind and adjust the speed controller. The posterior angle of the rectum aligns reasonably well in this position, especially with a slight downward tilt of the pelvis.

On Your Back, Knees Up

Machine at the edge of the bed, you lying on your back with knees drawn toward your chest. This works well for people who want to see the machine and keep the controller in hand. The angle can be slightly less natural for deeper insertion, but for moderate depth it is comfortable and stable. Pillows under the hips help with alignment.

Side-Lying

Lying on your side with the machine behind you. Less common but surprisingly comfortable for longer sessions because your body weight is fully supported. The challenge is keeping the machine from shifting — a non-slip mat or wedge under the base helps. We wrote about small-space setups specifically in our apartment positioning guide.

Avoid any position where you cannot reach the controls or where the machine could shift during use. Bolting or weighing down the machine base is standard practice — a thrusting machine that walks across the floor mid-session is a hazard, not a feature.

Safety and Hygiene for Anal Machine Use

Every attachment you use for anal must have a flared base or a secure mounting mechanism that prevents full insertion. The KlicLok connector itself acts as a retention point when the attachment is locked onto the machine — the attachment physically cannot pass fully into the body while connected. Verify this before every session: check the KlicLok is clicked in securely, not loose or partially engaged.

Lubrication

The rectum does not self-lubricate. Apply generous lubricant to the attachment and externally before starting. Reapply during the session — with a machine running, lubricant gets displaced faster than during manual play. Stop the machine to reapply. Thicker water-based lubricants work best for silicone attachments. If you are using the aluminium beaded dildo, silicone-based lubricant will last longer and hold up better under repetitive mechanical movement.

Cleaning

Clean all attachments before and after every use. Silicone attachments can be boiled for 3–5 minutes or wiped thoroughly with a dedicated toy cleaner. Aluminium can be sanitised with isopropyl alcohol or boiled. Do not skip the pre-session clean — bacteria on a stored toy can cause infections, especially with anal use.

For more detail on anal play preparation and hygiene, our anal toys guide covers the fundamentals that apply regardless of whether you are using a machine or a handheld toy.

Listen to Your Body, Not the Machine

A machine will not stop because something does not feel right. You have to stop it. Pain during anal play — sharp, burning, or sudden — means stop immediately. Discomfort and pressure during warm-up are normal; pain is not. Keep the controller within arm's reach at all times, and if you are using a model with app control, have the physical speed dial accessible as a backup. Bluetooth has lag. Your sphincter does not.

Choosing the Right HiSmith Machine for Anal Play

If your primary use case is anal, spend the extra money on a servo motor model. Servo motors maintain consistent torque at low speeds and run quieter — both of which matter for anal play, where you spend more time at low-to-medium speeds than you would with vaginal use. Entry-level DC motor machines are louder and can be inconsistent at the bottom of the speed range. That said, they still work — you just have less fine control.

We covered the full model range, including the tradeoffs between entry, mid-range, and premium, in our thrusting sex machines comparison. For exact motor specs or stroke depth on a particular model, check the individual product page — we do not list specs here that we have not confirmed directly from the listing.

Variable stroke depth is a near-essential feature for anal use. Fixed-depth machines still work, but you lose the ability to dial in a short, shallow stroke and gradually extend it as your body relaxes. That gradual increase is a large part of what makes machine anal play comfortable rather than confronting.

Where to Start

Pick up one of the silicone slim KlicLok anal attachments from our sex machine accessories range. Pair it with a thick water-based lubricant from our lubricants collection. Set the machine to minimum speed and minimum stroke depth. Give yourself 15 minutes of warm-up before you even think about turning the dial up.

If you do not own a HiSmith machine yet, browse the full HiSmith machines and accessories collection — we ship same-day from two warehouses and everything comes with a 1-year warranty. If you have questions about which model or attachment suits your situation, reach out to us at sales@pleasingstrings.com.au. We answer the questions other stores will not.

For background on how KlicLok compatibility works across different HiSmith models and attachments, the attachment selection guide is worth reading before you buy.