Replace Solid Pins Hollow Shoulder Pin with through Hole

Qimao Metal Manufacturer Replace Solid Pins Hollow Shoulder Pin with Through Hole is a direct substitute for standard solid shoulder pins. Outside diameter, shoulder height, and overall length match common solid pin dimensions. The difference is inside – a precision-drilled through-hole removes unnecessary material while leaving enough wall thickness for normal loads.

We start with centerless-ground bar stock. Then CNC turn the shoulder profile and drill the through-hole in one clamping operation. This keeps the hole concentric to the outer diameter within 0.05mm. No wobble. No off-center issues when used as a pivot.

The shoulder acts as a positive stop against the mating part. The straight section below the shoulder provides a bearing surface for rotation or sliding. You get the same locating function as a solid pin but with significantly less mass. For applications like folding linkages, access panels, or cable-routed hinges, this hollow design also gives you a built-in passage for wires or small tubing.

Product Parameter (Specification)

Product Feature

• Direct replacement Replace Solid Pins Hollow Shoulder Pin with Through Hole for standard solid shoulder pins – same outer dimensions, no housing modification needed

• Full-length through-hole removes 30–60% of weight depending on diameter and wall thickness

• Hole and OD concentric within 0.05mm – drilled and turned in same CNC clamping operation

• Minimum wall thickness calculated for your actual shear and bearing loads – no guessing

• Free engineering review – send us your solid pin drawing and load info, we recommend wall thickness

Application

• Aerospace access panel hinges – The Replace Solid Pins Hollow Shoulder Pin with Through Hole reduce weight without redesigning the housing or changing bolt patterns

• Racing car suspension pickups – cut unsprung mass for better tire contact and faster steering response

• Folding bicycle frame pivots – lighter weight makes folding easier, stainless option resists road spray

• Medical device positioning arms – less weight for nurses and doctors to lift every day

• Folding knife and multi-tool pivots – hollow center allows threaded screw to pass through for clamping

• Drone and UAV folding arms – saves grams on each pivot, extends flight time on racing and commercial drones

• Cable management hinges – route sensor wires or power cables through the protected hollow center

• Satellite deployable mechanisms – mass savings critical for tight budgets, hollow titanium or aluminum works well

• Manual lathe change gear pivots – lighter feel when moving the gear banjo, less fatigue during setup changes

• Laboratory clamp stands – lighter to adjust repeatedly, through-hole allows tether to prevent loss

• Automotive hood and trunk hinges – stainless hollow pins resist rust while saving a few ounces per vehicle

• Exercise equipment pivot points – reduces total machine weight for shipping and moving in gyms

• Marine hatch hinges – pass a safety lanyard through the hole so the pin cannot fall overboard

• 3D printer moving stages – less moving mass reduces ringing and ghosting at high print speeds

• Firearm trigger and hammer pins – hollow ends allow special tool removal without driving and damaging the frame

• Conveyor roller stub shafts – lower rotating inertia means faster start/stop and less belt wear

• Camera rig and gimbal pivots – lighter pins mean gimbal motors draw less battery power and run cooler

• Motorcycle lever pivots – saves a few grams per lever, noticeable reduction in rider fatigue on long rides

• Office chair tilt mechanisms – reduces assembly weight for factory workers and shipping cost for furniture companies

Installation Guide

1. Remove the existing solid pin. Clean the hole in both mating parts.

2. Check the Replace Solid Pins Hollow Shoulder Pin with Through Hole diameter matches the counterbore or recess in your part. The shoulder should sit flush or slightly below the surface – never proud.

3. Insert the straight section of the hollow pin through the first mating part, then through the second. The through-hole should face the direction where you might later route a cable or tool.

4. Push or lightly tap until the shoulder contacts the mating face. Do not hammer directly on the shoulder edge. Use a soft-faced mallet or a press tool that contacts the entire shoulder face.

5. For slip-fit applications, a retaining ring or setscrew may be needed on the opposite end. We do not recommend press-fitting hollow pins deeper than 2 times the pin diameter – the thin wall can collapse.

6. After installation, check that the pin does not rotate when it should not. If rotation is needed, confirm the clearance is 0.02–0.05mm.