MH has been providing OEM manufacturing services to world-renowned pharmaceutical package equipment companies for over 20 years, capable of consistently mass-producing challenging thin-walled parts to meet the stringent requirements of pharmaceutical packaging equipment in terms of high speed, cleanliness, and high reliability.

This rubber stopper sleeve is a typical precision, long, slender, thin-walled functional component with extremely high requirements for wall thickness consistency, coaxiality, and surface quality. It is a key pusher component in pharmaceutical packaging machinery, installed at high-speed filling or sealing stations, for:

√ Precisely guiding the stopper to ensure it does not skew during high-speed operation.

√ Isolating and protecting the outer surface of the stopper to prevent metal contact that could lead to particles or contamination.

√ Ensuring high repeatability and positioning accuracy to meet the cycle time consistency requirements of pharmaceutical equipment.

√ Adapting to frequent reciprocating motion, maintaining stable geometric accuracy under long strokes and high cycles.

This is a typical example of a functional thin-walled component with a seemingly simple structure but extremely high performance requirements.

Key Technical Challenges

√ High slenderness ratio (Slender + Thin Wall)

Overall slender tubular structure

Effective working section wall thickness is significantly smaller than diameter

√ High requirement for wall thickness consistency along axial height

Local thickness unevenness is not allowed, otherwise it will affect motion stability

√ Combination structure of local steps/connecting sections + ultra-thin cylindrical body

Assembly interface at bottom or middle

Long-distance thin-walled free section at the top

√ Sensitive to coaxiality of inner and outer circles

MH Manufacturing Solution

MH has long term process experience and advanced equipment in thin-walled machining, and for the ultra-long, thin-walled sleeve, our representative equipment includes:

√ STAR SR-20R / SR-32J Swiss-type lathe

Naturally suitable for slender, thin-walled parts

Spindle + guide sleeve structure significantly improves rigidity

√ TSUGAMI B0205 / B0326 Swiss CNC

Ultra-high repeatability

Perfect for pharmaceutical-grade small-diameter, thin-walled parts

√ Citizen Cincom L20 / M16 series

Strong coaxial control of thin-walled inner and outer diameters