- Part Number: Z-ARA311057
- EAN: 5052127039093
- Manufacturer: ARRMA
- Product Type: Pinion Gear
- Number of Teeth: 27
- Gear Pitch: Mod 1
- Bore Type: Safe-D5
- Motor Shaft Diameter: 5mm
- Material: Steel
- Set-Screw: M4 x 4mm (included)
- E-Clip: 3.2mm (included)
- Compatible Models: ARRMA Felony 6S BLX (Orange and Black), ARRMA Infraction 6S BLX (Silver and Blue), ARRMA 1/5 Kraton 4X4 8S BLX, ARRMA 1/5 Outcast 4X4 8S BLX
Overview
The ARRMA 27T Mod1 Safe-D5 Pinion Gear (Z-ARA311057) is an essential replacement part for RC enthusiasts who demand reliable performance from their electric RC cars. Whether you're running an ARRMA Felony 6S BLX, Infraction 6S BLX, or one of the powerful 1/5 scale brushless monster trucks, this precision-engineered steel pinion gear is the perfect addition to your RC tool box. Designed to withstand extreme RC conditions, this tough steel gear delivers consistent performance and longevity that serious bashers and racers rely on.
If you're looking for a quality pinion gear for your RC car UK setup, the ARRMA 27T Mod1 Safe-D5 offers the durability and precision you need to keep your RC running smoothly. RC enthusiasts who regularly maintain and upgrade their vehicles understand the importance of carrying spare gears, and this 27-tooth option is a must-have for anyone with compatible ARRMA models. The Safe-D5 design specifically addresses a common problem in RC driving: preventing drive loss if your set-screw backs out during aggressive bashing or racing.
This is not a complete ready to run RC car, but rather a critical replacement component that ensures your existing ARRMA brushless RC vehicle continues to perform at its best. Whether you're upgrading your current setup or building a spare parts collection, this pinion gear represents genuine ARRMA engineering and manufacturing quality that you can trust.
Key Features
- Strong and Durable Steel Construction — Manufactured from tough steel specifically chosen for long-lasting performance, this pinion gear resists wear and damage even under the demands of extreme RC conditions, ensuring you get extended usable life from your investment.
- Precision Manufactured Wide Tooth Profile — The wide tooth profile is engineered and manufactured to exacting tolerances, delivering smooth operation and reliable power transfer from your brushless motor to the rest of your RC drivetrain without slipping or grinding.
- Safe-D5 Design with D-Shaped Hole — The innovative D-shaped hole matches your 5mm motor shaft profile perfectly, meaning that even if your set-screw backs out during high-energy driving, you won't lose drive or brakes—a critical safety feature that sets this gear apart from standard pinions.
- 5mm Motor Shaft Compatibility — Designed specifically to fit 5mm diameter motor shafts, ensuring a precise fit with compatible ARRMA brushless motors without gaps, wobbling, or installation issues.
- Precision Manufactured Threaded Set-Screw Hole — The set-screw hole is precision-threaded to accept the included M4 x 4mm set-screw, preventing the frustration of stripped threads or loose fasteners that can cause gear slip.
- E-Clip Motor Shaft Retention — The included 3.2mm E-clip provides additional security on your motor shaft, working alongside the set-screw to ensure your pinion gear stays exactly where it should be, even during intense driving sessions.
Technical Performance
The ARRMA 27T Mod1 Safe-D5 Pinion Gear represents serious engineering for RC car enthusiasts who understand the importance of quality drivetrain components. With 27 teeth and a Mod 1 gear pitch, this pinion is designed to work seamlessly with ARRMA's brushless motor systems found in their 6S and 8S BLX vehicles. The steel construction provides superior durability compared to plastic alternatives, resisting stripping and maintaining precise tooth geometry even after hundreds of hours of use. The Safe-D5 bore design is specifically engineered to work with 5mm motor shafts commonly found in modern brushless RC cars, ensuring perfect alignment and power delivery. Whether you're running an ARRMA Felony 6S BLX in orange or black, an Infraction 6S BLX in silver or blue, or pushing the limits with a 1/5 scale Kraton 4X4 8S BLX or Outcast 4X4 8S BLX, this gear will provide the reliability and performance you expect from genuine ARRMA components. The precision manufacturing process ensures consistent tooth engagement and smooth operation, critical factors that directly impact your RC's acceleration, efficiency, and overall drivetrain longevity.
What's in the Box
- 1 x 27T Mod1 Safe-D Pinion Gear
- 1 x Set Screw - M4 x 4mm
- 1 x E-Clip - 3.2mm
Frequently Asked Questions
- What is the Safe-D5 design and why does it matter for my RC car? — The Safe-D5 refers to a D-shaped hole that matches a 5mm motor shaft profile. This innovative design prevents complete drive loss if your set-screw accidentally backs out during driving. Rather than your pinion gear spinning freely on a round shaft, the D-shaped hole keeps the gear engaged with the shaft, ensuring you maintain drive and braking capability even if fastener failure occurs. This is a significant safety and reliability feature that serious RC enthusiasts appreciate.
- Which ARRMA models is this 27T pinion gear compatible with? — The ARRMA 27T Mod1 Safe-D5 Pinion Gear is compatible with the Felony 6S BLX (both orange and black versions), Infraction 6S BLX (both silver and blue versions), and the powerful 1/5 scale brushless vehicles including the Kraton 4X4 8S BLX and Outcast 4X4 8S BLX. Check your vehicle's documentation to confirm your motor shaft diameter is 5mm before ordering.
- Why should I carry spare pinion gears in my RC tool box? — Pinion gears are wear items that experience constant rotation and load from your brushless motor. Over time, teeth can wear, or damage can occur from impacts or crashes. Having a spare 27T pinion gear ensures you're never stuck on the sidelines waiting for a replacement to arrive. This is especially important if you're an active RC enthusiast who bashers regularly or competes in RC racing events.
- What is Mod 1 gear pitch and does it matter? — Mod 1 (Module 1) is a gear pitch standard that defines the size and spacing of gear teeth. It's crucial that your pinion gear matches your spur gear's pitch, as mismatched gears will cause grinding, slipping, and rapid wear. This ARRMA 27T is Mod 1, so it must be paired with a Mod 1 spur gear on your RC vehicle to function correctly.
- Is this suitable for beginners? — This is a replacement component rather than a complete system, so it's best suited to RC enthusiasts who already own a compatible ARRMA vehicle and understand basic RC maintenance. Beginners should start with a ready to run RC car and learn basic driving before worrying about spare parts, though learning to install and maintain pinion gears is an excellent skill to develop as you progress in the hobby.
- What tools do I need to install this pinion gear? — You'll need a small wrench or hex key to remove your motor and existing pinion gear, plus a screwdriver or Allen key to tighten the M4 x 4mm set-screw. The installation process is straightforward: remove your motor from the vehicle, slide off the old pinion and E-clip, slide the new gear and E-clip onto the shaft, and secure with the set-screw.
Why Buy from RC Model Shop?
RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the ARRMA 27T Mod1 Safe-D5 Pinion Gear Z-ARA311057 today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
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