How to Fit the Driver for Rim Sprocket in Your Model Build

By eitech Metallbaukasten | Published: 2026-11-03

Category: 操作指南

Learn the correct order for fitting the eitech Driver for rim sprocket (01315) so your chain drive runs true. Step-by-step checks for a smooth rim sprocket assembly.

Quick answer

Fit the eitech Driver for rim sprocket (article 01315) by first mounting the rim sprocket on its axle, then sliding the driver onto the same shaft so its teeth engage the sprocket evenly. Tighten only after you confirm the chain line is straight and the sprocket turns without wobble.

Why the driver must engage before you tighten anything

The driver transfers motion from the axle to the rim sprocket. If you tighten the driver before the sprocket is seated, the teeth can sit half-engaged. That misalignment shows up later as a chain that jumps or a sprocket that wears unevenly. Treat the driver and sprocket as a pair: align them first, then lock them down.

When a single Standard variant is enough

The Driver for rim sprocket comes in one Standard variant (01315). That means you do not need to choose a size or tooth count for this part. If your build calls for a different sprocket size, check the rest of your eitech chain drive components before assuming this driver will fit. The catalog does not list alternative variants, so plan around the single Standard option.

Step-by-step fitting process

Mount the rim sprocket first: Slide the rim sprocket onto its axle and secure it lightly so it can still rotate. Check that the sprocket sits flat against its stop. Common mistake: tightening the sprocket before the driver is in place, which makes it hard to align the teeth later. The sprocket should spin freely with no side-to-side wobble before you move on.
Slide the driver onto the shaft: Push the Driver for rim sprocket onto the same shaft until its teeth meet the sprocket. Rotate the driver by hand until the teeth drop into the sprocket gaps. Do not force it. Checkpoint: the driver should sit flush with no gap between the teeth and the sprocket. If the driver will not seat, remove it and check for debris or a bent shaft before trying again.
Check the chain line: Run a straight edge or a length of chain across the sprocket and driver. The chain should run straight from the driver to the next sprocket in the build. Common mistake: aligning the driver to the sprocket but ignoring the rest of the chain path, which causes the chain to rub or derail. Adjust the axle position or add a spacer if the chain line is off by more than a millimeter.
Tighten the driver and sprocket: Hold the driver against the sprocket and tighten its fixing screw or collar. Then tighten the sprocket. Turn the axle by hand through a full rotation. Checkpoint: the chain should move smoothly with no tight spots or jumping. If you feel resistance, loosen both parts and repeat the alignment before tightening again.
Run a final hand test: Turn the drive by hand for several full rotations in both directions. Listen for clicking or grinding. Common mistake: skipping this test and discovering a misalignment only after the model is fully assembled. A quiet, smooth turn means the driver and rim sprocket are correctly fitted.

Product facts

Driver for rim sprocket: eitech Driver for rim sprocket, Standard variant, article code 01315, tagged Manufaktur. The single Standard variant means you can order this part without choosing a size, but you should verify it matches your existing rim sprocket before building.
Driver for rim sprocket