--- title: CPSK url: "https://www.wittenstein-group.com/en-us/product/cpsk" date: 2026-02-12 modified: 2026-02-24 lastUpdated: 2026-04-13 --- # CPSK alpha Basic Line Bevel gearbox The CPSK planetary gearbox impresses with two powerful output options and is also available with an optional B5 output flange. The angled step and the extended centering also enable particularly compact installation with reduced installation space. See CAD data and configure product Downloads ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/6/b/csm_CPSK-IMAGE_00fe66ee7f.webp) ### 3 – 100 Ratio ### 33 – 272 Nm Max. torque ### ≤ 15 arcmin Backlash [ Technical details ](#tech-details) [ Further information ](#further-info) [ Related products ](#related) [ Request consultation ](#consultation) ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-static_content/usp/14-2-flexibleConfiguration.svg) ###### Flexible configurability Various output variants enable precise integration – for maximum design freedom for individual requirements ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-static_content/usp/47-economic.svg) ###### Maximum efficiency The gearboxes in the alpha Basic Line impress with their outstanding price-performance ratio: cost-efficient to purchase, energy-efficient to operate – for economical and sustainable use ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-static_content/usp/4-9-compact.svg) ###### Compact performance Thanks to its high power density in a minimal installation space, the gearbox is ideal for space-critical applications - Configure product - Technical data - Available options - Downloads | Product type | | CPSK | |---|---|---| | Design | | MF | | Ratio | | 3 – 100 | | Number of sizes | | 3 | | Max. backlash c) | jt | ≤ 15 arcmin | | Max. torque | T2α | 33 – 272 Nm | | Max. input speed | n1Max | 5000 rpm | | c) In relation to reference sizes | | **Output shape** | | |---|---| | Smooth shaft | ✓ | | Shaft with key d) | ✓ | | **Input shape** | | | Motor-mounted | ✓ | | **Characteristic** | | | Food-grade lubrication a) b) | ✓ | | **Accessory** (for more information, see the relevant product pages) | | | Coupling | ✓ | | a) Performance reduction: Technical data available on request b) Please contact WITTENSTEIN alpha d) Performance reduction: For detailed sizing, please use our [cymex®](https://stage.wittenstein-group.com/de-de/produkt/cymex-5) design software | | Document name | Document type | Language | Downloads | |---|---|---|---| | ![CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPSK, NPTK, NPRK, CVS, CVH, NVS, NVH, HDV](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/ALPHA-BASIC-LINE-VALUE-LINE-US-fb4a30e90750.webp "Catalog alpha Basic Line & alpha Value Line") Catalog alpha Basic Line & alpha Value Line CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPSK, NPTK, NPRK, CVS, CVH, NVS, NVH, HDV | Brochure /Catalog | American English | [ Download (22 KB) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=4114&dl=1&st=1739&lg=0&token=53d8b5d5ef298cf06e536271c220fab32aeeade3)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=4114&st=1739&lg=0&token=cfadb9ddb03689be8f750f4f29e33e5ee0d02005) | | ![CPK, CPSK](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/ALPHA-BASIC-LINE-VALUE-LINE-CPK-CPSK-0d7f8378e3a5.webp "Technical data / Dimension sheets CPK / CPSK") Technical data / Dimension sheets CPK / CPSK CPK, CPSK | Brochure /Catalog | Neutral | [ Download (1 KB) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3249&dl=1&st=1739&lg=0&token=4dbd85edde2e555f6a1e59fd82ab273fab402382)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3249&st=1739&lg=0&token=cd5e4cba98375e3ef40d7e8f7c327c9e7855166e) | | ![Technical documents CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPTK, NPRK](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/OPERATING-MANUAL-NP-NPK-NPL-NPLK-NPR-NPRK-NPS-NPSK-NPT-NPTK-NTP-CP-CPK-CPS-CPSK-ea25c5cc4d41.webp "alpha Value Line / alpha Basic Line") alpha Value Line / alpha Basic Line Technical documents CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPTK, NPRK | Operating manual | Neutral | [ Download (3 KB) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3321&dl=1&st=1739&lg=0&token=42f5985a1ce2b3567fe78a37fec8fbf9b55c5d16)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3321&st=1739&lg=0&token=985ed6e750bb9fd85c0169596c7319737296e33a) | | ![](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/INFORMATION-SEALING-PLATE-190dba672cbe.webp "Sealing Plate") Sealing Plate | Operating manual | Neutral | [ Download (121 B) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3293&dl=1&st=1739&lg=0&token=c3d69de968cae2150db287914e6e8f2b6fe59b02)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3293&st=1739&lg=0&token=94da936c558ddf2b56f754082763bd13e3759ab7) | ![](https://www.wittenstein-group.com/fileadmin/_processed_/9/c/csm_logo-sculpture_e38190faf6.webp) Contact us ------------ Would you like to learn more about our solutions? We would be happy to advise you—personally, competently, and tailored to your requirements. [info@wittenstein-us.com](#) [ 1 630 540-5300 ](tel:16305405300) [ To the contact form ](https://www.wittenstein-group.com/en-us/contact-locations/contact) ![](https://www.wittenstein-group.com/fileadmin/_processed_/a/7/csm_cpsk-main-image_959681e200.webp) Easy connection of all common servo motors via a screwed adapter plate and numerous motor shaft diameters The modern, dynamic design highlights the gearbox's performance and sets new standards in its class The space-saving angle step allows insertion even in minimal installation spaces – ideal for compact machine designs Available in five graduated sizes (005 to 045) – suitable for a wide range of performance requirements Wide range of ratios from i = 3 to i = 100 – for maximum application versatility Maximum compactness thanks to long centering and flange mounting for B5 attachment – ideal for space-saving and flexible machine concepts ### cynapse® & smart services ### Accessories ![](https://www.wittenstein-group.com/fileadmin/_processed_/f/9/csm_cynapse-produkseite-element_slider_3783d47093.webp) With cynapse® and smart services, you can unleash the full potential of your drive system: sensor data is processed, visualized, and analyzed intelligently. Find out how the combination of gearboxes with cynapse® and our smart services can make your digital production faster, safer, and more efficient. [Read more](https://www.wittenstein-group.com/int-en/products/software-and-digitalization/cynapse-smart-services) ![](https://www.wittenstein-group.com/fileadmin/_processed_/3/0/csm_ELASTOMER-COUPLING-IMAGE-tabmodule_3a6e5abaa1.webp) Optimization of your value chain: Utilize the combination of gearboxes and accessories in a complete package to streamline your internal processes. Find suitable elastomer couplings for our products. [Read more](https://www.wittenstein-group.com/en-us/product/elastomer-couplings) Related products ------------------ ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-AssetsPublic/CPS-IMAGE.PNG)##### [ CPS ](https://www.wittenstein-group.com/en-us/product/cps) alpha Basic Line Ratio3 – 100Max. torque48 – 272 NmBacklash≤ 12 arcmin ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-AssetsPublic/NPS-IMAGE.PNG)##### [ NPS ](https://www.wittenstein-group.com/en-us/product/nps) alpha Value Line Ratio3 – 100Max. torque51 – 800 NmBacklash≤ 8 arcmin ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/5/0/csm_NPSK-IMAGE_33b7ab0519.webp)##### [ NPSK ](https://www.wittenstein-group.com/en-us/product/npsk) alpha Value Line Ratio3 – 100Max. torque33 – 700 NmBacklash≤ 11 arcmin ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/2/f/csm_ELASTOMER-COUPLING-IMAGE_5914e4c022.webp)##### [ Elastomer couplings ](https://www.wittenstein-group.com/en-us/product/elastomer-couplings) Max. acceleration torque0,1 – 2700 NmDynamic torsional rigidity0,1 – 52 Nm/arcminBore diameter D1/D26 – 80 mm ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/7/e/csm_METALBELLOWS-COUPLING-IMAGE_02aaadbe11.webp)##### [ Metal bellows couplings ](https://www.wittenstein-group.com/en-us/product/metal-bellows-couplings) Max. acceleration torque2 – 10000 NmTorsional rigidity4 – 3172 Nm/arcminBore diameter D1/D24 – 180 mm ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/c/1/csm_SAFETY-COUPLING-IMAGE_ed1d6bb91e.webp)##### [ Torque limiters ](https://www.wittenstein-group.com/en-us/product/torque-limiters) Release torque0,1 – 2700 NmTorsional rigidity4 – 379 Nm/arcminBore diameter D1/D23 – 100 mm