45CC Syringe Piston in 6061-T6, Ground OD at -0.013/-0.005 mm

6061-T6 45CC syringe piston: Ø22.48 -0.013/-0.005 ground OD, Ø20.5 +/-0.1 bore, MIL DTL 5541 Type II clear conversion coating, RoHS. Quote in 24 hours.

6061 Aluminum 45CC Syringe Piston, Ø22.48 Precision Outer Diameter

Medical Devices

A short wall aluminum piston for 45CC syringe and dispensing assemblies, with the outer diameter ground to a five micron band and a transparent conversion coating.

Custom to drawing±0.005 mm standard toleranceQuote in 24 hNo MOQISO 9001 · ISO 13485 · AS9100D

Request a Quote for This Part

Or email drawings to kgl@kglmfc.com

Relevant Capabilities

CNC Turning Surface Treatment/Passivation

Materials

Aluminum

Key Specifications

Parameter	KGL Capability
Material	Aluminum 6061-T6/T651, RoHS compliant
Process	CNC turning of cylinder, boring of Ø20.5 bore, OD grinding of Ø22.48, R0.5 / R2.0 radii, deburring, conversion coating
Outer diameter	Ø22.48 -0.013/-0.005 mm
Bore	Ø20.5 +/-0.1 mm
Length	7.5 mm
Finish	MIL DTL 5541 Type II, transparent
Inspection	Micrometer and caliper, bore gauge, roughness comparison, coating appearance
Tolerance	±0.005 mm standard on metals, engineering plastics, and carbon fiber composite
Certifications	ISO 9001:2015, ISO 13485:2016, AS9100D
Capacity	100+ CNC machines including 11 five-axis centers
MOQ	No MOQ; 1-piece prototypes supported
Quote	Within 24 hours for complete 2D/3D files

About This Part

A syringe piston is one dimension and two surfaces: the Ø22.48 mm outer diameter at minus 0.013 to minus 0.005 mm, a five micron band, ground after turning so the seal runs true in the barrel. The Ø20.5 plus or minus 0.1 mm bore and 7.5 mm length complete the geometry, with R0.5 and R2.0 maximum radii and 0.2 by 45 degree chamfers.

The finish is MIL DTL 5541 Type II conversion coating, transparent, which gives corrosion protection without dimension change, exactly what a five micron band needs. Material is 6061 T6 T651, RoHS compliant for the medical duty.

Appearance matters as much as geometry here: no scratches, deformation, tool marks, water stains, or rack marks. Inspection is micrometer and caliper, bore gauge, roughness comparison, and coating appearance on every part.

This part family supports the Medical Device Parts industry. Read how KGL machines parts for that sector, then send your drawing for a quote.

Why Machine It at KGL

Five-Axis Fleet

100+ CNC machines including 11 five-axis centers run complex geometry in single setups, so tolerances do not stack up across refixturing.

Verified Accuracy

±0.005 mm standard on metals, plastics, and carbon fiber composite, verified on Hexagon and Zeiss CMMs (0.0015 mm accuracy).

Fast Prototypes

Engineering feedback with every quotation; prototype parts typically machined in 15 to 25 days.

One Supplier, End to End

Material sourcing, machining, heat treatment coordination, finishing, CMM inspection and export packaging under one roof.

Part-Specific Advantages

Ø22.48 -0.013/-0.005 mm ground OD, five micron band
Ø20.5 +/-0.1 mm bore, 7.5 mm length
MIL DTL 5541 Type II transparent conversion coating
6061-T6/T651, RoHS compliant
Surface free of scratches, marks, and water stains

Typical Applications

45CC syringe pistons and plunger heads
Fluid components in medical dispensing equipment
Dispensing barrel accessories

Commercial Terms

Commercial	Detail
MOQ	No MOQ; 1-piece prototype supported
Quote	Within 24 hours for complete 2D/3D files
Terms	EXW / FOB Shenzhen
Certifications	ISO 9001:2015, ISO 13485:2016
Packaging	Individual bubble wrap, export carton or wooden case
Lead Time	Prototypes 7 to 15 days; production scheduled by volume

Common Questions

Why grind the OD after turning?

A five micron band on a seal diameter is beyond consistent turning. Grinding lands the band and the surface finish together, and the seal behaves.

Why a conversion coating instead of anodize?

Type II conversion coating adds almost no thickness, so the five micron OD band survives the finish. Anodize would grow the diameter out of tolerance.