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Machined Plastic
Parts |
Our products come from a wide range
of superior suppliers -- well-established and
respected companies, as well as some of the most
innovative manufacturers of engineering plastic
stock shapes on the scene experience in industrial
and engineering products, the people of MSO seals
and gaskets have the unique knowledge necessary to
take customer service a step beyond others in the
field. assistance to help you choose the proper
plastic material for your application. And, our
in-house CNC machine shop can even machine the parts
you need from your CAD files or drawings! |
MSO. Seals & Gaskets, Inc. offers parts
made from the following: |
| Acrylic |
Nyloil FG |
| G-5 Melanine laminate |
Nyloil MDX |
| G-7 Silicone laminate |
Nyloil (Cast natural) |
| G-10 Epoxy laminate |
Nyloil (Cast blue) |
| G-11 Epoxy laminate |
Nyloil (Cast MDS) |
| G-30 Epoxy |
Nyloil (Extruded natural) |
| Hytrel |
Phenoilic |
| MC 901 |
POM |
| Nylatron GS |
Polyurethane |
| Nylatron GSM |
Peek virgin |
| Nylatron GSM BLUE |
Peek -30% Glass |
| Nylatron NSM |
Peek -30% Carbon |
| Ryton |
UHMW |
Injection molded solid rod available
from 1.25" to 7".
Tube available from 2" to 40". Plate
stock is available up to 5" thick. |
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MACHINED PLASTICS
- Polyurethane, Polyurethane Moly,
Polyurethane Ether Base
- Nylon®
- Nylatron®
- Nylon®
- EPDM
- Hytrel®
- Phenolic®
- Pom®
- Ryton®, Ryton® Glass
- Teflon®®
- Peek®
- Toleron® , Toleron® Glass, Toleron®
Graphite
- Vespel® Actal
- Aflas®
- Flurosilicon
- Peek®, Peek Glass®, Peek® Carbon
- Kalrez®
- Nitrile Buna Rubber
- Virton®
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MACHINED OTHER PLASTICS: |
* Delrin |
* FEP |
* KEL-F |
* Kynar |
* Nylon |
* PFA |
* Polypropylene |
* PVC |
* UHMW |
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CUSTOM MACHINED PARTS |
Back-up rings |
V-Rings |
V-Packing |
Piston rings |
Ball valve seats |
Valve seats |
Lantern rings |
Piston cups |
Rod wipers |
Seals |
Gaskets |
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Valve/pump replacement parts |
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MACHINING CAPABILITIES |
Up to 65" diameter |
Molded Rod - 10 1/2" Diameter |
Molded Tube - 26" Diameter |
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General Fabrication Guidelines
The following
guidelines are presented for those
machinists not familiar with the machining
characteristics of plastics. They are
intended as guidelines only, and may not
represent the most optimum conditions for
all parts. The troubleshooting quick
reference in this section should be used to
correct undesirable surface finishes or
material responses during machining
operations.
Most quality
stock shape materials are stress relieved to
ensure the highest degree of machinability
and dimensional stability. However, the
relative softness of plastics (compared to
metals) generally results in greater
difficulty maintaining tight tolerances
during and after machining. A good rule of
thumb for tolerances of plastic parts is +/-
.001 per inch of dimension although tighter
tolerances are possible with very stable,
reinforced materials.
When
machining plastic stock shapes, remember...
- Thermal
expansion is up to 10 times greater with
plastics than metals
- Plastics
lose heat more slowly than metals, so
avoid localized overheating
- Softening (and melting) temperatures of
plastics are much lower than metals
- Plastics
are much more elastic than metals
Because of
these differences, you may wish to
experiment with fixtures, tool materials,
angles, speeds and feed rates to obtain
optimum results.
Getting Started
- Positive
tool geometries with ground peripheries
are recommended
- Carbide
tooling with polished top surfaces is
suggested for optimum tool life and
surface finish. Diamond coated or
polycrystalline tooling provides optimum
surface finish when machining Duratron®
XP or Vespel®
PI or Celazole* PBI.
- Use
adequate chip clearance to prevent
clogging
- Adequately support the material to
restrict deflection away from the
cutting tool
Turning
Operations require inserts with
positive geometries and ground peripheries.
Ground peripheries and polished top surfaces
generally reduce material build-up on the
insert, improving the attainable surface
finish. A fine grained C-2 carbide is
generally best for turning operations.
Drilling
The insulating characteristics of
plastics require consideration during
drilling operations, especially when hole
depths are greater than twice the diameter.
Small diameter holes (232" or 1mm to
1.0 or 25mm)
High speed steel twist drills are generally
sufficient for small holes. To improve swarf
removal, frequent pull-out (peck drilling)
is suggested. A slow spiral (low helix drill
will allow for better swarf removal.
Large diameter holes (1.0” or 25mm
and larger)
A slow spiral (low helix) drill or
general purpose drill bit ground to a 118°
point angle with 9° to 15° lip clearance is
recommended. The lip rake should be ground
(dubbed off) and the web thinned.
It is generally best to drill a pilot hole
(maximum 1/2” diameter) using 600 to 1,000
rpm and a positive feed of 0.005” to 0.015”
per revolution. Avoid hand feeding because
of the drill grabbing which can result in
microcracks forming. Secondary drilling at
400 to 500 rpm at 0.008 to 0.020” per
revolution is required to expand the hole to
larger diameters.
A two step process using both drilling and
boring can be used on notch sensitive
materials such as Ertalyte® PET-P, Torlon*
PAI, Duratron® XP, Vespel® PI, Celazole* PBI
and glass or carbon reinforced products.
This minimizes heat build-up and reduces the
risk of cracking.
- Drill a 1” diameter hole using an insert
drill at 500 to 800 rpm with a feed rate
of 0.005” to 0.015” per revolution.
- Bore the hole to final dimensions using
a boring bar with carbide insert with
0.015” to 0.030” radii at 500 to 1,000
rpm and a feed rate of 0.005 to 0.010”
per revolution.
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FABRICATION GUIDELINES - TURNING AND
DRILLING |
| MATERIALS |
REL.
MACHIN-
ABILITY
(1 to 10
1=easiest) |
TURNING |
DRILLING** |
| Depth of cut |
Speed
Feet/Min. |
Feed,
In./Rev. |
Nominal Hole Dia. |
Feed,
In./Rev. |
Acetal copolymer
Delrin®, Delrin® AF
Delrin® AF Blend
Nylon 101
Nylatron® GS, GSM
Nylatron® GSM Blue
Nylatron® NSM
MC® 901, MC® 907 Nylon
Polycarbonate
Polysulfone
Ultem® 1000 & 2300 PEI |
1
1
1
1
1
1
1
1
3
3
7 |
.150”
.025” |
500-600
600-700 |
.010-.015
.004-.007 |
1/16"
1/8"
1/4"
1/2"
3/4"
1"
1 1/2"
2" or > |
.007-.015
"
"
.015-.025
"
.020-.050
"
" |
Fluorosint® 500
Fluorosint® 207 |
1
1 |
.150”
.025” |
350-500
500-600 |
.010-.015
.003-.008 |
1/16"
1/8"
1/4"
1/2"
3/4"
1"
1 1/2"
2" or > |
.007-.015
"
"
.015-.025
"
.020-.050
"
" |
PEEK™, unfilled
PEEK 30% GF
PEEK 30% CF |
5
7
7 |
.150”
.025” |
600-1000
600-700 |
.010-.016
.004-.007 |
1/16"
1/8"
1/4"
1/2"
3/4"
1"
1 1/2"
2" or > |
.002-.005
"
"
.004-.008
"
.008-.012
"
" |
Ertalyte® PET-P
Ertalyte® TX
Hydex® 4101 PBT-P |
|
.150”
.025” |
500-600
600-700 |
.010-.015
.004-.007 |
1/16"
1/8"
1/4"
1/2"
3/4"
1"
1 1/2"
2" or > |
.002-.005
"
"
.015-.025
"
.020-.050
"
" |
Techtron® PPS
Ryton® PPS
Ryton® BG PPS |
|
.150”
.025” |
100-300
250-500 |
.010-.020
.005-.010 |
1/16"
1/8"
1/4"
1/2"
3/4"
1"
1 1/2"
2" or > |
.007-.015
"
"
.015-.025
"
.020-.050
"
" |
Torlon® 4203 PAI
Torlon® 4301 PAI
Torlon® 4501 PAI
Torlon® 4503 PAI
Torlon® 4540 PAI
Torlon® 5530 PAI
Duratron® XP
Vespel® PI |
|
.025” |
300-800 |
.004-.025
|
1/16"
1/8"
1/4"
1/2"
3/4"
1"
1 1/2"
2" or > |
.007-.015
"
"
.015-.025
"
.020-.050
"
" |
| Celazole® PBI |
|
.150”
.025” |
100-150
150-225 |
.005-.010
.002-.006 |
1/16" to 1/4"
1/2" or > |
.005-.015
.015-.025 |
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FABRICATION GUIDELINES - MILLING |
| MATERIALS |
End
Milling / Slotting |
Face
Milling
(C-2) Carbide Tool |
high speed
steel (m2,M7) |
Depth
of cut |
Speed,
ft./min. |
Feet,
in./tooth |
Depth
of cut |
Speed,
ft./min. |
Feet,
in./tooth |
Acetal copolymer
Delrin 150, Delrin AF
Delrin AF Blend
Nylon 101
Nylatron® GS Nylon
Nylatron® GSM,
Nylatron® GSM Blue,
Nylatron® NSM
MC® 901 Nylon,
MC® 907 Nylon |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.150
0.060 |
1300-1500
1500-2000 |
0.020
0.005 |
Polycarbonate
Polysulfone
Ultem® 1000 PEI
Ultem® 2300 PEI |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.150
0.060 |
1300-1500
1500-2000 |
0.020
0.005 |
| PEEK™ |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.150
0.060 |
500-750
" |
0.020
0.005 |
Fluorosint® 500
Fluorosint® 207 |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.150
0.060 |
500-700
550-750 |
0.010
0.005 |
Techtron® PPS
Ryton® PPS |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.150
0.060 |
1300-1500
1500-2000 |
0.020
0.005 |
| Torlon® PAI |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.035 |
500-800 |
.006-.035 |
Ertalyte® PET-P
Ertalyte® TX
Hydex® 4101 PBT-P |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.250
"
"
"
.050
"
" |
270-450
"
"
"
300-500
"
" |
0.002
0.003
0.005
0.008
0.001
0.002
0.004 |
0.150
0.060 |
1300-1500
1500-2000 |
0.020
0.005 |
Duratron® XP
Vespel® PI
Celazole® PBI |
1/4"
1/2"
3/4"
1", 2"
1/4"
1/2"
3/4" |
.50
.015 |
450-650
"
"
"
250-350
"
" |
0.005
0.002 |
0.050
0.015 |
450-650
250-350 |
0.005-.010
.002-.006 |
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FABRICATION GUIDELINES - SAWING |
| MATERIALS |
Sawing |
Material
thickness |
Tooth
form |
Pitch
teeth/in. |
Band Speeds
ft./min. |
Acetal copolymer
Delrin 150,
Delrin AF
Delrin AF Blend
Nylon 101
Nylatron® GS Nylon
Nylatron® GSM,
Nylatron® GSM Blue,
MC® 901 Nylon,
MC® 907 Nylon |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
10-14
6
3
" |
3,000
2,500
2,000
1,500 |
Polycarbonate
Polysulfone
Ultem® 1000 PEI
Ultem® 2300 PEI |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
10-14
6
3
" |
4,000
3,500
3,000
2,500 |
| PEEK™ |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
8-14
6-8
3
" |
4,000
3,500
3,000
2,500 |
Fluorosint® 500
Fluorosint® 207 |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
8-14
6-8
3
" |
3,000
2,500
2,000
1,500 |
Techtron® PPS
Ryton® PPS |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
8-14
6-8
3
" |
5,000
4,300
3,500
3,000 |
| Torlon® PAI |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
8-14
6-8
3
" |
5,000
4,300
3,500
3,000 |
Ertalyte® PET-P
Ertalyte® TX
Hydex® 4101 PBT-P |
<1/2"
1/2"-1"
1"-3"
3" |
Precision
"
Butress
" |
10-14
6
3
" |
5,000
4,300
3,500
3,000 |
Duratron® XP
Vespel® PI
Celazole® PBI |
3/8"-1"
1"-2" |
Precision
"
Butress
" |
10
10 |
3,000
1,500 |
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TROUBLESHOOTING QUICK REFERENCE |
Drilling |
Difficulty |
Common
Cause |
| Tapered hole |
1. Incorrectly
sharpened drill
2. Insufficient clearance
3. Feed too heavy |
| Burnt or melted
surface |
1. Wrong type
drill
2. Incorrectly sharpened drill
3. Feed too light
4. Dull drill
5. Web too thick |
| Chipping of
surfaces |
1. Feed too
heavy
2. Clearance too great
3. Too much rake (thin web as described) |
| Chatter |
1. Too much
clearance
2. Feed too light
3. Drill overhang too great
4. Too much rake (thin web as described) |
| Feed marks or
spiral lines on inside diameter |
1. Feed too
heavy
2. Drill not centered
3. Drill ground off-center |
| Oversize holes |
1. Web too thick
2. Insufficient clearance
3. Feed rate too heavy
4. Point angle too great |
| Undersize holes |
1. Dull drill
2. Too much clearance
3. Point angle too small |
| Holes not
concentric |
1. Feed too
heavy
2. Spindle speed too slow
3. Drill enters next piece too far
4. Cut-off tool leaves nib, which deflects
drill
5. Web too thick
6. Drill speed too heavy at start
7. Drill not mounted on center
8. Drill not sharpened correctly |
| Burr at cut-off |
1. Dull cut-off
tool
2. Drill does not pass completely through
piece |
| Rapid dulling of
drill |
1. Feed too
light
2. Spindle speed too fast
3. Insufficient lubrication from coolant |
Cutting
Off |
| Melted surface |
1. Dull tool
2. Insufficient side clearance
3. Insufficient coolant supply |
| Rough finish |
1. Feed too
heavy
2. Tool improperly sharpened
3. Cutting edge not honed |
| Spiral marks |
1. Tool rubs
during its retreat
2. Burr on point of tool |
| Concave or
convex surfaces |
1. Point angle
too great
2. Tool not perpendicular to spindle
3. Tool deflecting (use negative rake)
4. Feed too heavy
5. Tool mounted above or below center |
| Nibs or burrs at
cut-off point |
1. Point angle
not great enough
2. Tool dull or not honed
3. Feed too heavy |
| Burrs on outside
diameter |
1. No chamfer
before cut-off
2. Dull tool |
Turning
& Boring |
| Melted surface |
1. Tool dull or
heel rubbing
2. Insufficient side clearance
3. Feed rate too slow
4. Spindle speed too fast |
| Rough finish |
1. Feed too
heavy
2. Incorrect clearance angles
3. Sharp point on tool (slight nose radius
required)
4. Tool not mounted on center |
| Burrs at edge of
cut |
1. No chamfer
provided at sharp corners
2. Dull tool
3. Insufficient side clearance
4. Lead angle not provided on tool
(tool should ease out of cut gradually, not
suddenly) |
| Cracking or
chipping of corners |
1. Too much
positive rake on tool
2. Tool not eased into cut (tool suddenly
hits work)
3. Dull tool
4. Tool mounted below center
5. Sharp point on tool (slight nose radius
required) |
| Chatter |
1. Too much nose
radius on tool
2. Tool not mounted solidly
3. Material not supported properly
4. Width of cut too wide (use 2 cuts) |
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Trademark Acknowledgments:
RADEL and TORLON are registered trademarks of Solvay
Advanced Polymers.
RYTON is a registered trademark of Chevron Phillips
Chemical Company.
DELRIN and VESPEL are registered trademarks of
DuPont.
ULTEM is a registered trademark of General Electric
Company.
CELAZOLE is a registered trademark of Celanese
Advanced Materials, Inc.
HYDEX is a registered trademark of A.L. Hyde
Company.
DURATRON, ERTALYTE, NYLATRON, and TECHTRON are
registered trademarks of Quadrant DSM Engineering
Plastic Products.
PEEK is a trademark of Victrex plc.
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