Delrin Machining

A Guide to Delrin CNC Machined Parts: Properties, Applications and Design Considerations

What is Delrin®?

Delrin is a brand name for an Acetal homopolymer made solely by DuPont™. Together with Acetal copolymers, Delrin is an engineering plastic known for being amongst the strongest and stiffest of all thermoplastics.

Main Attributes of Delrin®:

Dimensional stability before, during and after machining
Low moisture absorption
Good chemical resistance to fuels and solvents
Low friction and high wear resistance
Wide operating temperature range (-40°C to 120°C)
Good compressive strength
Good shock resistance
Easy to machine

Delrin in comparison to Acetal Copolymers:

Stiffer
Higher flexural modulus at room temperature
Higher impact strengths at room temperatures and low temperatures
Tensile strength is approximately 10-15% higher than comparable copolymers
Slightly higher continuous use temperature than copolymer (95°C vs. 90°C)
Lower thermal expansion rate
Better wear resistance

REQUEST DELRIN MACHINING QUOTE

Detailed information about Delrin for designers including UK stock sizes and technical properties can be found in the tabs below. Please note: this information is provided as a guide only. All information is based on our present knowledge and is given in good faith. No liability will be accepted by Penta Precision in respect of any action taken by any third party in reliance thereon.

Similar or obsolete designation and trade names

You may also see Delrin referred to as:

POM-H
Grades. DuPont offer a good variety of grades including those with medium-high viscosity, low VOC emissions and food and healthcare grades.
- Delrin® 100P / 100PE / 100TE / 100STE / 100ST / 100T
- Delrin® 300CP / 300PE / 300TE / 300CP NC010
- Delrin® 500P / 500PE / 500TE / 500T
- Delrin® 127UVE / 327UVE / 527UVE (UV resistant)
- Delrin® FG400MTD BLA079 (metal detectable)
- Delrin® FG400XRD NC010 (X-Ray detectable)

Here at Penta Precision, we have significant expertise in Delrin so please do pick up the phone if you would like to chat through your options when it comes to grades of Delrin and your application.

Delrin Components, Applications & Industries

Here are some examples of the industries and components for which Delrin is appropriate. This is by no means an exhaustive list. Please do get in touch if you are considering using Delrin and we can talk through your project with you.

Typical Components & Applications:

High load mechanical applications
Brackets
Gears
Safety Restraints
Bearings
Handles
Rollers
Guides

Industry Examples:

Typically used in highly regulated industries such as:

Aerospace

Nuclear

Pharmaceutical

Electronics

Black Delrin Machined Parts / R&D

Black Delrin Machined Parts - R&D

Delrin® Machining Service - Delrin Milling & Turning

Penta Precision provides highly accurate Delrin machined parts. Customers turn to us when they have had quality and delivery issues with their existing suppliers and need a reliable precision machining partner.

Penta Precision provides the following Delrin machining services:

CNC milling – prototypes & large batch runs
CNC turning – prototypes & large batch runs
Insert installation
Part marking
Manual milling
Manual turning
Machining design advice
Machining drawing service

Reasons to Choose Penta:

ISO 9001:2015 quality assurance
Consistent high quality machined parts
Reliable delivery dates - our track record speaks volumes
Exceptional customer service and communication
Machining design advice
Extensive experience in our field

What Makes Penta Different?

Our 3 unique pillars to delivering exemplary service:

We Communicate well
We take Care at each stage
Our service is Consistent

See our ‘Proven Process’ page to find out more

We are regularly machining Delrin for customers all over the UK. Our customers depend on our machining expertise as well as our outstanding delivery performance, to machine the highest quality parts. If you'd like to discuss how we can help you with your Delrin machining requirements, here's a list of ways to get in touch with us.

6 x 500	+0.20/+0.70
8 x 500*	+0.20/+1.10
10 x 500	+0.20/+1.10
12 x 500	+0.30/+1.50
16 x 500*	+0.30/+1.50
20 x 500	+0.30/+1.50
25 x 500	+0.30/+1.50
30 x 500	+0.50/+5.00
40 x 500	+0.50/+5.00
50 x 500	+0.50/+5.00
60 x 500*	+0.50/+3.50
80 x 500**	+0.50/+5.00
100 x 500**	+0.50/+5.00

6 x 500

+0.20/+0.70

8 x 500*

+0.20/+1.10

10 x 500

+0.20/+1.10

12 x 500

+0.30/+1.50

16 x 500*

+0.30/+1.50

20 x 500

+0.30/+1.50

25 x 500

+0.30/+1.50

30 x 500

+0.50/+5.00

40 x 500

+0.50/+5.00

50 x 500

+0.50/+5.00

60 x 500*

+0.50/+3.50

80 x 500**

+0.50/+5.00

100 x 500**

+0.50/+5.00

Ø10*	+0.10/+0.70
Ø12*	+0.20/+0.80
Ø16	+0.20/+0.80
Ø18*	+0.20/+0.80
Ø20	+0.20/+0.80
Ø22*	+0.20/+1.00
Ø25	+0.20/+1.00
Ø28*	+0.20/+1.00
Ø30	+0.20/+1.00
Ø32	+0.20/+1.20
Ø36*	+0.20/+1.20
Ø40	+0.20/+1.20
Ø45	+0.30/+1.30
Ø50	+0.30/+1.30
Ø56*	+0.30/+1.30
Ø60	+0.30/+1.60
Ø65	+0.30/+1.60
Ø70	+0.30/+1.60
Ø75	+0.40/+2.00
Ø80	+0.40/+2.00
Ø90*	+0.50/+2.20
Ø100	+0.60/+2.50
Ø110*	+0.70/+3.00
Ø125	+0.80/+3.50
Ø135*	+0.90/+3.80
Ø150*	+1.00/+4.20
Ø160*	+1.10/+4.50
Ø165*	+1.20/+5.00
Ø200*	+1.30/+5.50

Ø10*

+0.10/+0.70

Ø12*

+0.20/+0.80

Ø16

+0.20/+0.80

Ø18*

+0.20/+0.80

Ø20

+0.20/+0.80

Ø22*

+0.20/+1.00

Ø25

+0.20/+1.00

Ø28*

+0.20/+1.00

Ø30

+0.20/+1.00

Ø32

+0.20/+1.20

Ø36*

+0.20/+1.20

Ø40

+0.20/+1.20

Ø45

+0.30/+1.30

Ø50

+0.30/+1.30

Ø56*

+0.30/+1.30

Ø60

+0.30/+1.60

Ø65

+0.30/+1.60

Ø70

+0.30/+1.60

Ø75

+0.40/+2.00

Ø80

+0.40/+2.00

Ø90*

+0.50/+2.20

Ø100

+0.60/+2.50

Ø110*

+0.70/+3.00

Ø125

+0.80/+3.50

Ø135*

+0.90/+3.80

Ø150*

+1.00/+4.20

Ø160*

+1.10/+4.50

Ø165*

+1.20/+5.00

Ø200*

+1.30/+5.50

Mechanical Properties	Value	Parameter	Norm	Comments
Modulus of Elasticity (Tensile Strength) (MPa)	3400	1mm/min	DIN EN ISO 527-2	For tensile test: specimen type 1b
Tensile Strength (MPa)	79	50mm/min	DIN EN ISO 527-2
Tensile Strength at Yield (MPa)	79	50mm/min	DIN EN ISO 527-2
Elongation at Yield (%)	37	50mm/min	DIN EN ISO 527-2
Elongation at Break (%)	45	50mm/min	DIN EN ISO 527-2
Flexural Strength (MPa)	106	2mm/min	DIN EN ISO 178	For flexural test:supoort span 64mm, norm specimen
Modulus of Elasticity (Flexural Test)	3600	-	DIN EN ISO 178
Compression Strength (MPa)	19/33	1% / 2%, 5mm/min, 10N	EN ISO 604	Specimen 10x10x10mm
Compression Modulus (MPa)	2700	5mm/min, 10N	EN ISO 604	Specimen 10x10x50mm, modulus range between 0.5 and 1% compression
Impact Strength (Charpy) (KJ/m^2)	n.b.	Max 7,5J	DIN EN ISO 179-1EU	For charpy test: support span 64mm, norm specimen. nb = not broken
Notched Impact Strength (Charpy) (KJ/m^2)	15	Max 7,5J	DIN EN ISO 179-1eA
Ball Indentation Hardness (MPa)	185	-	ISO 2039-1

Mechanical Properties

Value

Parameter

Norm

Comments

Modulus of Elasticity (Tensile Strength) (MPa)

3400

1mm/min

DIN EN ISO
527-2

For tensile test: specimen type 1b

Tensile Strength (MPa)

50mm/min

DIN EN ISO 527-2

Tensile Strength at Yield (MPa)

50mm/min

DIN EN ISO 527-2

Elongation at Yield (%)

50mm/min

DIN EN ISO 527-2

Elongation at Break (%)

50mm/min

DIN EN ISO 527-2

Flexural Strength (MPa)

106

2mm/min

DIN EN ISO 178

For flexural test:supoort span 64mm, norm specimen

Modulus of Elasticity (Flexural Test)

3600

DIN EN ISO 178

Compression Strength (MPa)

19/33

1% / 2%, 5mm/min, 10N

EN ISO 604

Specimen 10x10x10mm

Compression Modulus (MPa)

2700

5mm/min, 10N

EN ISO 604

Specimen 10x10x50mm, modulus range between 0.5 and 1% compression

Impact Strength (Charpy) (KJ/m^2)

n.b.

Max 7,5J

DIN EN ISO 179-1EU

For charpy test: support span 64mm, norm specimen. nb = not broken

Notched Impact Strength (Charpy) (KJ/m^2)

Max 7,5J

DIN EN ISO 179-1eA

Ball Indentation Hardness (MPa)

185

ISO 2039-1

Thermal Properties	Value	Parameter	Norm	Comments
Glass Transition Temperature (°C)	-60	-	DIN 53765	Found in public sources
Melting Temperature (°C)	182	-	DIN 53765
Service Temperature (Short Term) (°C)	150	-	-	Found in public sources. Individual testing regarding application conditions is mandatory
Service Temperature (Long Term) (°C)	110	-	-
Thermal Expansion (CLTE) (10-₅ K-₁)	12	23-60°C, long	DIN EN ISO 11359-1;2
Thermal Expansion (CLTE) (10-₅ K-₁)	13	23-100°C, long	DIN EN ISO 11359-1;2
Specific Heat (J/g*K)	1.3	-	ISO 22007-4:2008
Thermal Conductivity W/(K*m)	0.43	-	ISO 22007-4:2008

Thermal Properties

Value

Parameter

Norm

Comments

Glass Transition Temperature (°C)

-60

DIN 53765

Found in public sources

Melting Temperature (°C)

182

DIN 53765

Service Temperature (Short Term) (°C)

150

Found in public sources. Individual testing regarding application conditions is mandatory

Service Temperature (Long Term) (°C)

110

Thermal Expansion (CLTE) (10-₅ K-₁)

23-60°C, long

DIN EN ISO 11359-1;2

Thermal Expansion (CLTE) (10-₅ K-₁)

23-100°C, long

DIN EN ISO 11359-1;2

Specific Heat (J/g*K)

1.3

ISO 22007-4:2008

Thermal Conductivity W/(K*m)

0.43

ISO 22007-4:2008

Electrical Properties	Value	Parameter	Norm
Specific Surface Resistance (Ω)	10₁₄	-	DIN IEC 60093

Electrical Properties

Value

Parameter

Norm

Specific Surface Resistance (Ω)

10₁₄

DIN IEC 60093

Other Properties	Value	Parameter	Norm	Comments
Water Absorption (%)	0.05/0.1	24h/96h (23°C)	DIN EN ISO 62	Øca, 50mm, h=13mm
Flammability	HB	Corresponding to	DIN IEC 60695-11-10	Corresponding mean no listing at UL (yellow card). the information might be taken from resin, stock shape or estimation. Individual testing regarding application conditions is mandatory.

Other Properties

Value

Parameter

Norm

Comments

Water Absorption (%)

0.05/0.1

24h/96h (23°C)

DIN EN ISO 62

Øca, 50mm, h=13mm

Flammability

Corresponding to

DIN IEC 60695-11-10

Corresponding mean no listing at UL (yellow card). the information might be taken from resin, stock shape or estimation. Individual testing regarding application conditions is mandatory.

Delrin Machining

A Guide to Delrin CNC Machined Parts: Properties, Applications and Design Considerations

What is Delrin®?

Main Attributes of Delrin®:

REQUEST DELRIN MACHINING QUOTE

Similar or obsolete designation and trade names

Delrin Components, Applications & Industries

Typical Components & Applications:

Industry Examples:

Delrin® Machining Service - Delrin Milling & Turning

Reasons to Choose Penta:

What Makes Penta Different?

CNC Machining Delrin - Notes for Designers

Delrin Machining Characteristics

Delrin UK Stock Sizes

Example Delrin Stock Sizes

Delrin Plate*

Delrin Round Bar

Delrin Technical Properties

Delrin Mechanical Properties

Delrin Thermal Properties

Delrin Electrical Properties

Other Delrin Properties

Further Reading & Resources