Which eitech Accessories Support Vehicle Builds: Axles, Cranks and Couplings

Quick answer

For a moving eitech vehicle, start with the parts that carry motion: a correctly sized axle, a gear that matches your drive idea, and a steering or coupling element only if your model needs it. Buy one spare of each critical part rather than a large mixed lot, and check diameter, length and connection type against your existing build before ordering.

Building a vehicle from eitech parts is less about collecting accessories and more about choosing the few components that make the model roll, steer or drive. The wrong axle length or gear module stops a build faster than a missing screw.

This guide explains how to pick eitech accessories for vehicle builds using the catalog facts available for each part, what each component is realistically good for, and where a simpler choice is the better buy.

Start with the axles, because everything else depends on them

Axles are the backbone of any rolling eitech vehicle. Two catalog options show the range clearly: the Axle 4x70 mm profile, galvanized is a long, smooth profile axle, while the Axle with one-sided threaded end 4x35 mm is shorter and has a threaded end for fixing a wheel or a nut. Length and end type decide whether a wheel sits where you want it.

The 4 mm diameter is the common thread between these parts, so the real decision is length and end treatment. A 70 mm axle gives you reach across a wide chassis or through two frame rails. A 35 mm axle with a threaded end is better where you need a secure stop rather than extra length.

• Measure the distance between your chassis rails before ordering, then add the thickness of any wheel or bearing.
• Keep one spare axle of each length you use; axles are the part most often bent or lost during rebuilding.

Crank steering and couplings: buy them only when the model steers or tows

The Crank steering model from the eitech Manufaktur line is a steering component, not a general-purpose connector. It belongs in builds where the front wheels need to turn together, such as a car or a truck. If your model is a trailer, a crane base or a static display, this part adds cost and complexity without changing how the model works.

Couplings follow the same logic. A miniature coupling socket is useful when one vehicle pulls another or when you want a removable connection between two sections. If your build never tows anything, skip it. Buying steering and coupling parts speculatively is the most common way an accessory order turns into unused stock.

• Add crank steering only if you have already planned the front axle layout.
• Add a coupling socket only if a second vehicle or trailer is part of the plan.

Gears decide whether the vehicle drives or just rolls

A gear changes a vehicle from a push-along model into a driven one. The Gear 26 teeth module 1 hexagon socket is a precision component from the eitech Manufaktur line with a defined tooth count and module, and it connects through a hexagon socket. That hexagon socket is the practical detail: it tells you the gear mounts on a matching hex shaft rather than a plain round axle.

Module and tooth count must match the gear you pair it with. If you cannot confirm the module of your existing gear, do not guess. Buy the matching pair together, or keep the build push-along until you can verify the specification. A mismatched gear will not mesh cleanly no matter how carefully you assemble it.

• Match module first, tooth count second, mounting type third.
• If your existing gear has no visible specification, treat the drivetrain as unverified and buy a matched set.

Wheels, tires and the parts that finish a rolling model

Wheels and tires are the visible end of the drivetrain, and they are also where fit problems show up first. A wheel that is too wide rubs the frame; one that is too narrow leaves the axle end exposed. Because the supplied catalog records do not list wheel or tire dimensions, the honest approach is to test-fit with the axle you already own before buying more.

Work outward from the axle: confirm the axle diameter and length, confirm the wheel bore, then confirm clearance inside the body. This order avoids the common mistake of buying tires that look right but sit against the chassis.

• Test-fit one wheel on one axle before ordering a full set.
• Leave a small gap between tire and frame; a tight fit will bind when the axle turns.

Decision rules for buying eitech vehicle accessories

• If the model must roll but not steer: Buy axles and wheels only. Skip crank steering and couplings. Lowest cost path to a working vehicle.
• If the model must steer: Add the Crank steering component and plan the front axle layout before ordering. Steering parts are only worth buying once the front geometry is decided.
• If the model must be driven: Buy a matched gear pair, not a single gear, and confirm module and mounting type. Unverified gear specifications are the main cause of failed drivetrains.
• If the model must tow or connect: Add a miniature coupling socket only when a second vehicle or trailer exists. Couplings are a two-part decision, not a one-part purchase.
• If you are unsure about a specification: Do not guess. Buy the smallest quantity that lets you test-fit, then order the rest. Test-fitting one part is cheaper than replacing a wrong set.

Catalog facts that affect your choice

• Axle 4x70 mm profile, galvanized: Galvanized profile axle, 4x70 mm, listed under the eitech Manufaktur tag with code 01356P. The 70 mm length suits wide chassis and multi-rail frames, and the galvanized finish is the version to choose when the model will be handled often.
• Axle with one-sided threaded end 4x35 mm: Spare part with a one-sided threaded end, 4x35 mm, item code 01368, supplied as a single standard item. The threaded end gives a positive stop for a wheel or nut, which is useful on short axle runs where a plain axle would slide.
• Crank steering: Part of the eitech Manufaktur line, SKU 01861, Standard variant. It is a dedicated steering component, so it earns its place only in models with steerable front wheels.
• Gear 26 teeth module 1 hexagon socket: Precision gear with 26 teeth, module 1, hexagon socket connection, SKU 01804. The hexagon socket and module 1 specification must match your shaft and mating gear, so verify both before buying.

Who should buy which vehicle accessory

Best for

• Builders extending an existing eitech vehicle who already know their axle diameter and length
• Hobbyists adding steering or towing to a model that already rolls reliably
• Parents replacing a single worn or lost axle rather than buying a new set

Not for

• First-time builders who have not yet assembled a basic eitech frame
• Anyone buying gears without a confirmed module and shaft type
• Builders looking for a complete vehicle kit, who should start with a full set instead

Choose vehicle accessories in the order the model moves: axles first, then wheels, then steering, gears or couplings only if the build genuinely needs them. Verify diameter, length and connection type before ordering, and keep a spare of the parts that wear or bend. That approach keeps a vehicle build rolling without filling a drawer with parts you never fit.