{"id":1603,"date":"2026-07-15T03:49:57","date_gmt":"2026-07-15T03:49:57","guid":{"rendered":"https:\/\/gearrack.top\/product\/plastic-internal-gear-pom-peek-m0-15-m2-0-agma-13\/"},"modified":"2026-07-15T03:50:17","modified_gmt":"2026-07-15T03:50:17","slug":"plastic-internal-gear-pom-peek-m0-15-m2-0-agma-13","status":"publish","type":"product","link":"https:\/\/gearrack.top\/it\/product\/plastic-internal-gear-pom-peek-m0-15-m2-0-agma-13\/","title":{"rendered":"Plastic Internal Gear – POM\/PEEK, M0.15-M2.0, AGMA 13"},"content":{"rendered":"
\n

<\/p>\n

Product Overview<\/h2>\n
\n
\n \"Plastic\n <\/div>\n
\n

A plastic internal gear<\/strong> is an internal ring gear whose gear body and tooth form are composed of engineering thermoplastic \u2014 an alternative to steel ring gears for applications where the plastic gear’s inherent advantages (lower mass, no rust, lower manufacturing cost, self-lubrication, non-magnetic, electrical isolation) outweigh its lower load capacity compared with steel. Plastic pinions are not made of tooth-shaped transmission parts in the traditional machining sense \u2014 they are formed directly in the injection moulding process, which allows very complex geometry (stepped shafts, flanges, integrated rack-engagement channels) to be produced in a single moulding operation with no secondary finishing required. This represents a cost saving of 50\u201390% over metal counterparts in the appropriate size and load range.<\/p>\n

Korea Ever-Power’s precision plastic internal gears<\/a> are produced in POM, PA, PPA, PBT, and PEEK \u2014 module M0.15 to M2.0, diameter \u03a63\u2013\u03a6120 mm \u2014 to meshing grades from DIN 5 through AGMA 13. ISO 9001:2008 \/ TS16949 certified. ODM and OEM service. Vacuum tray packed. DHL and UPS delivery.<\/p>\n<\/p><\/div>\n<\/div>\n

The structure of the plastic internal gear differs from the metal internal gear in that the gear seat is made of plastic material, allowing a lower overall mass. The shaft of the plastic internal ring gear includes a stepped portion that engages a gear on its periphery \u2014 the stepped portion comprises two straight-edge sections and an inclined section. The rack moves along the channel as the gear turns, while the free end moves along the track. This integrated shaft-and-ring-gear construction is achievable only in injection moulding, and is the primary reason plastic internal gears dominate in automotive window regulator mechanisms, household appliance drives, and medical device actuators where the metal equivalent would require separate shaft and ring gear components with additional assembly operations.<\/p>\n

<\/p>\n

Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Plastic Internal Gear \u2014 Product Specification<\/th>\n<\/tr>\n<\/thead>\n
Standard Dimension<\/strong><\/td>\n\u03a660 mm standard; range \u03a63 mm \u2013 \u03a6120 mm<\/td>\n<\/tr>\n
Module Range<\/strong><\/td>\nM0.15 \u2013 M2.0<\/td>\n<\/tr>\n
Material<\/strong><\/td>\nPOM, PA (nylon), PPA, PBT, PEEK \u2014 as customer specified<\/td>\n<\/tr>\n
Meshing Grade<\/strong><\/td>\nISO 6, JGMA 1, JIS 6, AGMA 13, DIN 6, DIN 5, AGMA 12<\/td>\n<\/tr>\n
Application<\/strong><\/td>\nAutomotive, military, aircraft, mechanical, industrial, medical<\/td>\n<\/tr>\n
Customisation<\/strong><\/td>\nODM \/ OEM supported<\/td>\n<\/tr>\n
Campioni<\/strong><\/td>\nDisponibile<\/td>\n<\/tr>\n
Packing<\/strong><\/td>\nVacuum-packed with plastic tray<\/td>\n<\/tr>\n
Delivery<\/strong><\/td>\nDHL, UPS international express<\/td>\n<\/tr>\n
Certifications<\/strong><\/td>\nISO 9001:2008; TS16949<\/td>\n<\/tr>\n
Stock Range<\/strong><\/td>\nModule 1, 20\u2013140 teeth (standard stock) \u2014 other configurations on order<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Plastic Material Selection<\/h2>\n

\"types<\/p>\n

\n
\n

POM (Polyoxymethylene \/ Delrin)<\/h3>\n

The most common plastic for precision gear applications. Excellent dimensional stability, low moisture absorption (0.2%), good chemical resistance, self-lubricating, and the best combination of stiffness and toughness among standard gear plastics. POM gears run quietly against steel or nylon pinions without grease in light-to-medium load applications. Typical use:<\/strong> automotive window regulators, HVAC actuators, printer drives, appliance mechanisms.<\/p>\n<\/p><\/div>\n

\n

PA (Nylon \u2014 PA6, PA66)<\/h3>\n

Higher toughness than POM; better wear resistance against metal pinions; absorbs more moisture (1\u20133%) which can cause dimensional change in humid environments. Glass-filled PA66 (30% GF) provides significantly higher stiffness and load capacity for larger internal ring gears where standard PA’s deflection under load would cause interference. Typical use:<\/strong> power tool ring gears, bicycle hub internals, consumer electronics drives.<\/p>\n<\/p><\/div>\n

\n

PPA (Polyphthalamide)<\/h3>\n

Semi-aromatic polyamide with higher heat resistance than PA66 (HDT 260\u2013280\u00b0C at 1.8 MPa, glass-filled). Lower moisture absorption than PA66. Better dimensional stability at elevated temperatures \u2014 critical for automotive under-bonnet internal gear drives where ambient temperature can reach 130\u2013150\u00b0C. Typical use:<\/strong> automotive transmission actuators, EV motor auxiliary drives, high-temperature industrial controls.<\/p>\n<\/p><\/div>\n

\n

PBT (Polybutylene Terephthalate)<\/h3>\n

Good dimensional stability, excellent chemical resistance to fuels and lubricants, low moisture absorption. Stiffer than PA at the same wall thickness. Glass-filled PBT provides high stiffness-to-weight ratio. Typical use:<\/strong> automotive fuel system ring gears, electrical connector internal drives, appliance motor drive ring gears where chemical resistance to cleaning agents is required.<\/p>\n<\/p><\/div>\n

\n

PEEK (Polyether Ether Ketone)<\/h3>\n

The highest-performance engineering thermoplastic for gear applications. Continuous use temperature 250\u00b0C; excellent chemical resistance to virtually all solvents and lubricants; radiation resistant; biocompatible (ISO 10993). PEEK internal ring gears approach metal gears in load capacity at significantly lower weight. Typical use:<\/strong> aircraft actuator drives, military equipment, medical implant mechanisms, high-temperature industrial drives.<\/p>\n<\/p><\/div>\n

\n

Material Selection Guide<\/h3>\n

POM \u2192 default choice (best value, best precision). PA \u2192 where toughness vs steel pinion matters. GF-PA66 \u2192 higher load, larger ring gears. PPA \u2192 under-bonnet automotive. PBT \u2192 chemical\/fuel resistance. PEEK \u2192 extreme temperature, aircraft, medical implant. Send the application conditions \u2014 temperature, load, chemical environment, accuracy grade \u2014 and Korea Ever-Power will confirm the optimal plastic grade for your internal ring gear.<\/p>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

Plastic vs Metal Internal Ring Gears<\/h2>\n

\"Ever-Power<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Property<\/th>\nPlastic (POM\/PA\/PEEK) \u2605<\/th>\nSteel (C45)<\/th>\nStainless Steel<\/th>\n<\/tr>\n<\/thead>\n
Weight (per unit volume)<\/strong><\/td>\n1.1\u20131.4 g\/cm\u00b3 \u2713<\/td>\n7.85 g\/cm\u00b3<\/td>\n7.93 g\/cm\u00b3<\/td>\n<\/tr>\n
Corrosion Resistance<\/strong><\/td>\nExcellent (no rust) \u2713<\/td>\nLow (coating needed)<\/td>\nExcellent \u2713<\/td>\n<\/tr>\n
Self-Lubricating<\/strong><\/td>\nYes (POM\/PA) \u2713<\/td>\nNo<\/td>\nNo<\/td>\n<\/tr>\n
Manufacturing Cost<\/strong><\/td>\n50\u201390% lower \u2713<\/td>\nStandard<\/td>\nHigher<\/td>\n<\/tr>\n
Operating Noise<\/strong><\/td>\nLower \u2713<\/td>\nHigher<\/td>\nHigher<\/td>\n<\/tr>\n
Non-Magnetic<\/strong><\/td>\nYes \u2713<\/td>\nNo<\/td>\nYes (austenitic) \u2713<\/td>\n<\/tr>\n
Max Operating Temp.<\/strong><\/td>\n90\u00b0C (POM) \u2013 250\u00b0C (PEEK)<\/td>\n300\u00b0C+ \u2713<\/td>\n870\u00b0C \u2713<\/td>\n<\/tr>\n
Load Capacity<\/strong><\/td>\nLow\u2013moderate<\/td>\nHighest \u2713<\/td>\nHigh<\/td>\n<\/tr>\n
Secondary Finishing Required<\/strong><\/td>\nNo \u2713<\/td>\nYes (machining)<\/td>\nYes (machining)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Applications<\/h2>\n

\"Ever-Power<\/p>\n

\n
\n
<\/div>\n

Automotive Systems<\/h3>\n

POM or PPA internal ring gears M0.5\u2013M1.5 in window regulator planetary drives, seat adjuster mechanisms, HVAC door actuators, and electric parking brake drives. TS16949 certification meets automotive OEM incoming qualification. Vacuum tray packing protects dimensional precision during transit.<\/p>\n<\/p><\/div>\n

\n
<\/div>\n

Medical Equipment<\/h3>\n

PEEK internal ring gears M0.3\u2013M1.0 DIN 5\u20136 in surgical robot joint planetary drives, infusion pump drives, and diagnostic equipment table positioning actuators. PEEK’s biocompatibility (ISO 10993), radiation resistance, and autoclave compatibility suit implant-adjacent and sterile-environment medical device applications.<\/p>\n<\/p><\/div>\n

\n
\u2708\ufe0f<\/div>\n

Aircraft and Military<\/h3>\n

PEEK internal ring gears M0.2\u2013M0.8 AGMA 13 in aircraft instrument planetary drives, satellite mechanism ring gears, and military equipment actuators. Non-magnetic, radiation-resistant, and operating at 250\u00b0C continuous \u2014 PEEK internal gears replace stainless steel in weight-critical aerospace applications.<\/p>\n<\/p><\/div>\n

\n
<\/div>\n

Industrial and Mechanical Drives<\/h3>\n

POM or GF-PA66 internal ring gears M0.5\u2013M2.0 in industrial robot joint planetary stages, printing machine drives, packaging machine actuators, and conveyor system small planetary reducers. The 50\u201390% cost saving vs metal ring gears at these load levels makes plastic internal gears the economical standard for high-volume industrial drive applications.<\/p>\n<\/p><\/div>\n

\n
<\/div>\n

Consumer Electronics<\/h3>\n

POM internal ring gears M0.15\u2013M0.5 in camera lens zoom drive planetary stages, smart watch movement planetary gear sets, and printer paper feed planetary drives. The cost saving over metal at this scale is decisive \u2014 POM internal ring gears at M0.15 are too small for metal machining at competitive cost but straightforward in injection moulding.<\/p>\n<\/p><\/div>\n

\n
\ufe0f<\/div>\n

Food Processing Equipment<\/h3>\n

POM or FDA-compliant PA internal ring gears in food processing machine planetary drives where metal gears would require oil lubrication (contamination risk) and rust protection. POM’s self-lubrication eliminates grease in the food contact zone; its non-rusting property suits the washdown environment where steel gears corrode between production runs.<\/p>\n<\/p><\/div>\n<\/div>\n

<\/p>\n

Frequently Asked Questions<\/h2>\n
\n
\n

Why are plastic internal gears 50\u201390% cheaper than metal?<\/p>\n

The cost difference comes from the manufacturing process. A metal internal ring gear requires: raw material (steel bar or forging), CNC turning of the OD and bore, internal gear shaping (slow, tool-limited by bore space), heat treatment, surface treatment, and dimensional inspection \u2014 typically 5\u20137 operations. An injection-moulded plastic internal ring gear requires: mould tooling amortised over the batch, and a single injection moulding cycle (30\u201390 seconds per part) \u2014 1 operation. Once the mould is made, the marginal cost per plastic ring gear is the material cost plus the moulding cycle time, with no heat treatment, no surface treatment, and no secondary machining required.<\/p>\n<\/div>\n

\n
\n

How can plastic internal gears achieve AGMA 13 \/ DIN 5 accuracy?<\/p>\n

Injection-moulded plastic gears can achieve higher dimensional accuracy than is generally expected because the mould is machined to extremely tight tolerances (\u00b10.005 mm on tooth profile) and the injection moulding process fills the mould cavity consistently under controlled pressure, temperature, and cooling parameters. The resulting plastic gear inherits the mould’s tooth profile accuracy. POM’s low shrinkage (1.5\u20132.0%) is the reason it achieves the best accuracy among standard gear plastics \u2014 the dimensional change from the mould dimension to the finished part is small and predictable. At fine pitch (M0.15\u2013M0.5), plastic moulding actually achieves better tooth surface quality than metal machining at the same pitch.<\/p>\n<\/div>\n

\n
\n

What are the interference conditions for plastic internal ring gears?<\/p>\n

Plastic internal gears can be used with the same-module spur gears (metal or plastic), depending on the number of teeth combination. It is necessary to check for involute interference, trochoid interference, and trimming interference for the specific tooth count combination chosen. For standard tooth number combinations, Korea Ever-Power’s “Technical Information of Internal Gears” section provides the usable tooth count combinations at standard module and pressure angle. For non-standard combinations, Korea Ever-Power’s engineering team will check the interference condition and confirm feasibility before production.<\/p>\n<\/div>\n

\n
\n

Are stock plastic internal ring gears available for immediate delivery?<\/p>\n

Yes \u2014 Korea Ever-Power maintains stock of Module 1 plastic internal ring gears in the 20\u2013140 teeth range in standard POM material. These stock gears are available for immediate delivery by DHL or UPS and are vacuum tray packed to protect the tooth profile in transit. For other modules (M0.15\u2013M2.0), custom order production is available \u2014 sample lead time and production lead time confirmed on enquiry. For custom geometry (stepped shaft, integrated rack channel, non-standard mounting features), ODM service covers design and mould production from the customer’s application requirement. Contact our team<\/a> with the module, tooth count, and material to check stock availability.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Customer Reviews<\/h2>\n
\n
\n

“We design automotive window regulator mechanisms and switched from metal to Korea Ever-Power’s POM internal ring gears M1.0 DIN 6. Noise at our acoustic test reduced by 4 dB(A) compared with the metal equivalent \u2014 significant for a component installed in the passenger door. TS16949 certification accepted at our OEM supplier qualification. DHL delivery. Vacuum tray packaging maintained the gear profile precision at our incoming measurement.”<\/p>\n

Kim Ji-soo<\/strong>  |  Automotive Mechanism Design Engineer, Incheon Automotive Systems Co.  ·  Q1 2026<\/em><\/p>\n<\/div>\n

\n

“We develop surgical robot joint drives and specified PEEK plastic internal ring gears<\/a> M0.5 AGMA 13 for MRI-compatible wrist joints. Non-magnetic confirmed (no response to 0\u20133T MRI field), autoclave compatible (134\u00b0C 50 cycles without dimensional change), and ISO 10993 biocompatible. Korea Ever-Power is the only supplier we found who produces PEEK internal ring gears at M0.5 to AGMA 13 accuracy.”<\/p>\n

Lee Min-jeong<\/strong>  |  Surgical Robot Mechanism Engineer, Gyeonggi Medical Robotics Co.  ·  Q4 2025<\/em><\/p>\n<\/div>\n

\n

“We manufacture food processing conveyors and use POM internal ring gears from Korea Ever-Power in our planetary drive units. No grease required \u2014 POM self-lubrication confirmed adequate for our 8-hour production run cycle at our belt speed and tension specification. ISO 9001:2008 certification accepted at our food safety supplier audit. Zero corrosion issues in the washdown environment after 2 years of production.”<\/p>\n

Park Sung-min<\/strong>  |  Food Processing Equipment Engineer, Busan Food Systems Co.  ·  Q2 2026<\/em><\/p>\n<\/div>\n

\n

“We import plastic internal ring gears Module 1 (stock range, 20\u2013140 teeth, POM) for distribution to industrial machinery manufacturers. The stock availability with DHL delivery means our customers can get parts in 3\u20134 days instead of the 20-day sample lead time for custom plastic gears. Vacuum tray packaging maintained the AGMA 12 profile accuracy confirmed at our distributor’s incoming gear measurement check.”<\/p>\n

Choi Byeong-hoon<\/strong>  |  Precision Gear Distribution Manager, Daejeon Precision Components Co.  ·  Q3 2025<\/em><\/p>\n<\/div>\n

\n

“We design camera lens zoom drives and needed POM internal ring gears M0.2 DIN 5 \u2014 a combination that no metal machining supplier could quote competitively. Korea Ever-Power’s injection moulding in POM at M0.2 DIN 5 gave us a 73% cost saving versus the best machined metal quotation. Tooth profile accuracy confirmed on our optical gear analyzer \u2014 within DIN 5 on all 10 sample gears.”<\/p>\n

Yoon Hyeon-kyu<\/strong>  |  Optical System Mechanism Engineer, Ulsan Precision Optics Co.  ·  Q1 2025<\/em><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Related Products<\/h2>\n
\n
\n
\n \"Planetary
\n <\/a><\/p>\n
\n

Ring Gears<\/h3>\n

Full ring gear range: metal automotive, industrial, planetary, steel, and aerospace internal ring gears alongside the plastic internal gear range.<\/p>\n

Browse Ring Gears \u2192<\/a>\n <\/div>\n<\/p><\/div>\n

\n
\n \"Plastic
\n <\/a><\/p>\n
\n

Helical Gears<\/h3>\n

Plastic helical gears for lower-noise parallel shaft planetary drives \u2014 the helical complement to plastic internal ring gear assemblies in automotive and consumer product drives.<\/p>\n

Browse Helical Gears \u2192<\/a>\n <\/div>\n<\/p><\/div>\n

\n
\n \"Industrial
\n <\/a><\/p>\n
\n

Ingranaggi conici<\/h3>\n

Bevel gears for right-angle direction changes in automotive, medical, and industrial drives \u2014 the intersecting-shaft complement to plastic internal ring gear planetary assemblies.<\/p>\n

Browse Bevel Gears \u2192<\/a>\n <\/div>\n<\/p><\/div>\n

\n
\n \"Nylon
\n <\/a><\/p>\n
\n

Spur Gears<\/h3>\n

Nylon and plastic external spur gears for sun pinion and planet gear roles in planetary assemblies with plastic internal ring gears \u2014 matched material for all-plastic planetary drive systems.<\/p>\n

Browse Spur Gears \u2192<\/a>\n <\/div>\n<\/p><\/div>\n<\/div>\n

\n

Request a Quotation for Plastic Internal Gears<\/h3>\n

Module 1, 20\u2013140T POM in stock. Custom M0.15\u2013M2.0 in POM \/ PA \/ PPA \/ PBT \/ PEEK. AGMA 13 \/ DIN 5 standard. ISO 9001:2008 \/ TS16949. ODM\/OEM. Vacuum tray. DHL \/ UPS.<\/p>\n

Get a Quote Now<\/a>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

Korea Ever-Power plastic internal ring gears are precision injection-moulded internal gears \u2014 POM, PA, PPA, PBT, PEEK; module M0.15\u2013M2.0; \u03a660 mm standard (\u03a63\u2013\u03a6120 mm range). Meshing grades ISO 6, JGMA 1, JIS 6, AGMA 13, DIN 6, DIN 5, AGMA 12. ODM\/OEM supported. Vacuum-packed in plastic tray. DHL and UPS delivery. ISO 9001:2008 \/ TS16949. Applications: automotive, military, aircraft, mechanical, industrial, medical. Module 1, 20\u2013140 teeth in stock (POM). Cost saving 50\u201390% vs metal.<\/p>","protected":false},"featured_media":1604,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[4560],"product_tag":[],"class_list":["post-1603","product","type-product","status-publish","has-post-thumbnail","product_cat-ring-gear","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product\/1603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/comments?post=1603"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media\/1604"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media?parent=1603"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_brand?post=1603"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_cat?post=1603"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_tag?post=1603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}