Rack Profile B 10 Teeth: Where It Fits in Your Builds
By eitech Metallbaukasten | Published: 2026-11-02
Category: Product Reviews
A practical FAQ on the eitech Rack Profile B 10 Teeth: what it does, how it pairs with pinions, and where a short 10-tooth rack earns its place in model builds.
Quick answer
Use the eitech Rack Profile B 10 Teeth when you need a compact linear drive: pair it with a matching pinion to convert rotation into short, precise sliding motion. It suits small mechanisms where a full-length gear rack would be overkill.
Why a 10-tooth rack changes the gearing math
Tooth count on the rack is not the same as tooth count on a gear, but it still shapes how far the rack travels per turn of the pinion. A short 10-tooth rack gives you limited linear travel, so it works best for mechanisms that need a nudge rather than a long stroke. If you are used to counting teeth on gears, think of the rack as the straight sibling: the pinion does the counting, and the rack converts that rotation into distance.
When the 10-tooth length is an advantage—and when it is not
The compact size makes the Rack Profile B 10 Teeth easy to tuck into tight frames, small lift mechanisms, or sliding brackets where a longer rack would collide with other parts. The trade-off is travel: if your model needs to move a load more than a short distance, you will likely need a longer rack or a different linkage. Check your intended stroke before committing, because extending a short rack is not as simple as adding another piece without a proper joint.
Matching the rack to a pinion without guesswork
eitech does not publish a module or pitch specification for this rack in the supplied catalog, so you cannot calculate a perfect mesh from numbers alone. The practical approach is to test-fit the rack against the pinion you plan to use and check for smooth rolling without binding. A pinion that is clearly too large or too small will show up immediately as rough engagement or skipped teeth. If you already have a favorite gear from your collection, start there and adjust the spacing rather than forcing the mesh.
Rack Profile B 10 Teeth: common questions answered
- What does a rack profile actually do in a model?
- It turns rotary motion from a gear into straight-line motion. You mount the rack on the moving part and let a pinion gear push it back and forth. That makes it useful for sliding doors, lifting arms, or any short linear adjustment.
- Can I use the 10-tooth rack with any eitech gear?
- Not necessarily. The rack must mesh with a pinion of compatible tooth shape and size. Since eitech does not list a module for this rack, test the pair by hand: the teeth should roll smoothly without jamming or skipping. If they do not, try a different gear before changing the rack. Always dry-fit the rack and pinion before building them into a frame.
- How do I mount the rack so it stays aligned?
- Keep the rack parallel to the direction of travel and set the pinion distance so the teeth engage about halfway. Use the holes or slots on the rack profile to fasten it to your model, and check that the rack can slide freely without rubbing the frame.
- Is a 10-tooth rack long enough for a steering mechanism?
- Probably not for a full steering swing, because the travel is short. It can work for a small trim adjustment or a locking tab, but for a visible steering rack you will usually want a longer rack or a linkage that multiplies the movement.
- Where can I find the exact dimensions?
- The supplied catalog lists only the tooth count, color, and range for this part. For precise length or hole spacing, measure the physical part or check the eitech building instructions for your model. Do not assume dimensions from other rack profiles.
Product facts
- Rack profile B 10 teeth, black: The Rack Profile B is a black rack profile with 10 teeth, part of the eitech Manufaktur range and listed under SKU 01870_SW (Standard). Knowing it is a standard Manufaktur part helps you match it with other components from the same system and plan replacements consistently.
Rack profile B 10 teeth, black
