YEJMKJ 3D printer parts and accessories, by sales rank — on offer now

Every YEJMKJ listing in our parts & accessories section on Amazon UK, by sales rank. The brand comes from Amazon’s own listing data.

3 currently discounted.

Product	Material	Rating	Price	Deal
YEJMKJ 3Pack Nema 17 Stepper Motor 1.8‌°‌ 2 Phase High Torque 0.84Nm(118.95oz·	—	5.0 out of 5 (2 Amazon ratings)	£69.04	—
YEJMKJ Ratio 20:1 Planetary Gearbox for Nema 17 Stepper Motor 42-66mm Backlash	—	—	£69.37	—
YEJMKJ 10Pack Nema 17 Stepper Motor 2 Phase 1.8‌°‌ 0.6Nm(84.97oz·in) High Torq	—	—	£123.43	13% below

3D printer parts and accessories by brand

Belts, tension and layer shifts
Ringing, wavy walls and prints that jump halfway through are usually mechanical. How to tension a belt by feel, and what else causes a shifted layer.
Build surfaces compared: PEI, glass and textured plates
Smooth PEI, textured PEI, glass and the rest — what each is actually good at, which filaments they fight with, and when a worn sheet is your real problem.
Calibration tools: calipers, gauges and what you actually need
One tool does most of the work and costs about a tenner. What digital calipers are for, and which other measuring kit is worth owning.
Finishing tools: deburring, sanding and cleanup
A handful of cheap tools turn a rough print into a finished part. What to buy first, the right sandpaper progression, and why wet sanding beats dry.

Best-selling Parts & accessories by year — which actually sold best, going back several years, ranked by sales position rather than opinion.