Car Seat Height Adjustment Lead Screw

Product Description:

Qimao Metal Manufacturer Car Seat Height Adjustment Lead Screw is what moves the seat up and down. The motor spins it, the nut travels along the threads, and the cushion goes either higher or lower. Simple enough.

We use medium-carbon steel with rolled threads rather than cut ones. Rolling gives better fatigue life because the grain structure stays intact. The trapezoidal thread profile handles load well without generating a lot of friction, so the mechanism stays smooth over time.

End configurations vary. Some need a clip groove, some need a bearing journal. We machine whatever the assembly requires. Coating is zinc or manganese phosphate, both offer decent corrosion resistance for cabin conditions.

We check straightness on every piece. A bent screw binds and wears out fast, so we don’t cut corners there. Thread accuracy gets inspected too.

We’ve been making these for years. Most customers come back, which says enough about the quality.

Specification:

Product Name:	Item No.:	Material:	Measurement(mm):			Surface Finish:	Weight(g):
			L:	W:	Dia:
Car Seat Height Adjustment Lead Screw	QM1106	Steel	97	6×6	14.34	Polish	37.65

Products Details:

Thread form is trapezoidal, which is the common choice for Car Seat Height Adjustment Lead Screw type of application because it handles load better than standard V-threads. The pressure angle falls between 10 and 16 degrees, a range that gives good meshing without generating excessive friction. Surface roughness is held to a specific Ra value so the nut travels smoothly without sticking or chattering. Straightness is checked on each piece because even a slight bend will cause binding and premature wear in the adjuster mechanism. End configurations vary – some require a flat or a slot for clip retention, others need a specific diameter for bearing support, and we machine these according to the drawing provided.

Product Feature:

• The Car Seat Height Adjustment Lead Screw’s threads are rolled, not cut. That gives them better fatigue life because the metal grain flows around the thread form instead of being broken.

• We use medium-carbon steel, heat-treated so the hardness is uniform across the whole length.

• The trapezoidal profile is a better choice for this application. Less friction than V-threads, so the motor doesn’t work as hard.

• For corrosion protection, we do either zinc or manganese phosphate. Both do the job fine in a vehicle cabin.

• Ends are whatever the customer’s assembly needs. Grooves, reduced diameters, flats, you name it.

• We check every piece for straightness. A slight bend shows up as binding or noise when the seat moves.

• Lead angle is calculated to give a decent speed without letting the seat sag under a heavy occupant.

• Lots of our customers use these in replacement and repair work, not just new builds.

Product Application:

• Most commonly used in power-adjustable front seats on sedans, SUVs, and light trucks

• Works as a replacement part when the original lead screw strips, wears out, or gets damaged from overloading

• Fits aftermarket seat adjuster kits for custom vehicle interiors or restoration projects

• Used by RV and conversion van builders who install non-standard seating layouts

• Also applicable to marine seating, agricultural machinery cabs, and industrial operator stations that use electric height adjustment

• Suitable for prototype development and low-volume production where off-the-shelf components are preferred