{"title":"Spline Plug Gages","description":"\u003cp\u003eSpline plug gages inspect an internal spline — the broached or shaped form inside a hub, gear, coupling or shaft bore. A composite plug checks the effective fit of the whole form at once, which is what determines whether the mating shaft will actually assemble.\u003c\/p\u003e\n\n\u003ch2\u003eSpline forms we supply\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInvolute\u003c\/strong\u003e — the curved-flank form used in most power-transmission splines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelical\u003c\/strong\u003e — an involute form cut at a helix angle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStraight-sided\u003c\/strong\u003e — parallel flanks, common in older and heavy-duty designs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSerration\u003c\/strong\u003e — fine-pitch vee form for shallow, high-count applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMade to your print\u003c\/h2\u003e\n\u003cp\u003eSpline gages are made to order from your specification — number of teeth, pitch, pressure angle, class of fit and length of engagement. Send a print or the spline data and we will quote the gage. Final inspection is completed in an environmentally controlled ISO\/IEC 17025 accredited laboratory. Ring gages for the mating external spline are on the \u003ca href=\"\/collections\/spline-ring-gages\"\u003eSpline Ring Gages\u003c\/a\u003e page.\u003c\/p\u003e","products":[{"product_id":"involute-spline-plug-gage","title":"Involute Spline Plug Gage","description":"\u003cp\u003eWESTport involute spline plug gages check \u003cstrong\u003einternal splined bores\u003c\/strong\u003e for composite (effective) error, tooth form, index\/pitch, and effective\/actual size. Supplied as GO and NO-GO sets: the GO member verifies full-form fit with the mating part, while the NO-GO guards individual space width.\u003c\/p\u003e\n\u003ch2\u003eStandards\u003c\/h2\u003e\n\u003cp\u003eBuilt to the major involute spline standards — \u003cstrong\u003eANSI B92.1\u003c\/strong\u003e, \u003cstrong\u003eANSI B92.2M\u003c\/strong\u003e, \u003cstrong\u003eISO 4156\u003c\/strong\u003e, \u003cstrong\u003eDIN 5480\u003c\/strong\u003e, \u003cstrong\u003eJIS B 1603\u003c\/strong\u003e, and \u003cstrong\u003eSAE J498\u003c\/strong\u003e — or to your drawing.\u003c\/p\u003e\n\u003ch2\u003eActual and effective tolerance\u003c\/h2\u003e\n\u003cp\u003eDesigned to both actual and effective tolerance, so a part that assembles correctly and stays within individual-feature limits is confirmed in one workflow.\u003c\/p\u003e\n\u003ch2\u003eCertification \u0026amp; quality\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned, ground, and hand lapped in-house for accuracy and long service life\u003c\/li\u003e\n\u003cli\u003eCertificate of Accuracy, NIST-traceable — included with every gage\u003c\/li\u003e\n\u003cli\u003eCalibrated in our ISO\/IEC 17025 accredited laboratory; Long Form Certificate available on a 5–7 business day turnaround\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/express-gage-quote\"\u003eRequest a quote\u003c\/a\u003e, or inspect external shafts with the \u003ca href=\"\/products\/involute-spline-ring-gage\"\u003eInvolute Spline Ring Gage\u003c\/a\u003e.\u003c\/p\u003e","brand":"WESTport","offers":[{"title":"Default Title","offer_id":51043424239652,"sku":null,"price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/Involute_Spline_Gage_-_Copy.png?v=1784070263"},{"product_id":"helical-spline-plug-gage","title":"Helical Spline Plug Gage","description":"\u003cp\u003eWESTport helical spline plug gages provide Go\/No-Go inspection of \u003cstrong\u003einternal helical splines\u003c\/strong\u003e, built to your helix angle and hand. They verify composite error, tooth form, and effective\/actual size on helical splined bores.\u003c\/p\u003e\n\u003ch2\u003eMade to your specification\u003c\/h2\u003e\n\u003cp\u003eManufactured to major involute spline standards or to your drawing. Specify helix angle, hand, module\/diametral pitch, and number of teeth on your request.\u003c\/p\u003e\n\u003ch2\u003eCertification \u0026amp; quality\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned, ground, and hand lapped in-house for accuracy and long service life\u003c\/li\u003e\n\u003cli\u003eCertificate of Accuracy, NIST-traceable — included with every gage\u003c\/li\u003e\n\u003cli\u003eCalibrated in our ISO\/IEC 17025 accredited laboratory; Long Form Certificate available on a 5–7 business day turnaround\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/express-gage-quote\"\u003eRequest a quote\u003c\/a\u003e with your spline data.\u003c\/p\u003e","brand":"WESTport","offers":[{"title":"Default Title","offer_id":51043424272420,"sku":null,"price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/Helical_Spline_Gage.png?v=1784070251"},{"product_id":"straight-sided-spline-plug-gage","title":"Straight-Sided Spline Plug Gage","description":"\u003cp\u003eWESTport straight-sided spline plug gages inspect \u003cstrong\u003einternal straight-sided splines\u003c\/strong\u003e, where the tooth flanks run parallel rather than following an involute profile. The GO member verifies full-form fit; the NO GO member guards individual space width.\u003c\/p\u003e\n\u003ch2\u003eStandards \u0026amp; setup\u003c\/h2\u003e\n\u003cp\u003eBuilt to the straight-sided standard called out on your print, such as \u003cstrong\u003eDIN 5482\u003c\/strong\u003e, or to your drawing. Straight-sided gages are \u003cstrong\u003enot interchangeable with involute spline gages\u003c\/strong\u003e — confirm the tooth form on the drawing before ordering.\u003c\/p\u003e\n\u003ch2\u003eCertification \u0026amp; quality\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned, ground, and hand lapped in-house for accuracy and long service life\u003c\/li\u003e\n\u003cli\u003eCertificate of Accuracy, NIST-traceable — included with every gage\u003c\/li\u003e\n\u003cli\u003eCalibrated in our ISO\/IEC 17025 accredited laboratory; Long Form Certificate available on a 5–7 business day turnaround\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/express-gage-quote\"\u003eRequest a quote\u003c\/a\u003e, or inspect external straight-sided splines with the \u003ca href=\"\/products\/straight-sided-spline-ring-gage\"\u003eStraight-Sided Spline Ring Gage\u003c\/a\u003e. For serrated forms see the \u003ca href=\"\/products\/serration-spline-plug-gage\"\u003eSerration Spline Plug Gage\u003c\/a\u003e.\u003c\/p\u003e","brand":"WESTport","offers":[{"title":"Default Title","offer_id":51043424305188,"sku":null,"price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/Straight-Sided_and_Serration_Spline_Plug_Gage.png?v=1784070258"},{"product_id":"serration-spline-plug-gage","title":"Serration Spline Plug Gage","description":"\u003cp\u003eWESTport serration plug gages inspect \u003cstrong\u003einternal serrations\u003c\/strong\u003e — the multiple equally spaced teeth that give positive engagement between mating components. The GO member confirms the serrated bore will assemble with its mating part; the NO GO member guards the upper dimensional limit. Both together give a fast functional check without measuring every tooth.\u003c\/p\u003e\n\u003ch2\u003eSerration or spline?\u003c\/h2\u003e\n\u003cp\u003eSerrations and splines are different tooth forms and each needs its own gage. If the drawing calls out a serration, an involute or straight-sided spline gage will not inspect it correctly — always confirm the tooth form on the print first.\u003c\/p\u003e\n\u003ch2\u003eStandards \u0026amp; setup\u003c\/h2\u003e\n\u003cp\u003eBuilt to \u003cstrong\u003eSAE J498\u003c\/strong\u003e and DIN serration standards, or to your drawing. To quote we need the engineering specification, the number of teeth, tooth dimensions, class of fit, and whether the serration is internal or external.\u003c\/p\u003e\n\u003ch2\u003eCertification \u0026amp; quality\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned, ground, and hand lapped in-house for accuracy and long service life\u003c\/li\u003e\n\u003cli\u003eCertificate of Accuracy, NIST-traceable — included with every gage\u003c\/li\u003e\n\u003cli\u003eCalibrated in our ISO\/IEC 17025 accredited laboratory; Long Form Certificate available on a 5–7 business day turnaround\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/express-gage-quote\"\u003eRequest a quote\u003c\/a\u003e, or inspect external serrations with the \u003ca href=\"\/products\/serration-ring-gage\"\u003eSerration Spline Ring Gage\u003c\/a\u003e.\u003c\/p\u003e","brand":"WESTport","offers":[{"title":"Default Title","offer_id":51203952803876,"sku":null,"price":0.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/files\/Serration_Spline_Plug_Gage.png?v=1785877701"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2546\/6268\/collections\/af6826cc37038566d8165421e4187a30.jpg?v=1786641878","url":"https:\/\/westportcorp.com\/collections\/spline-plug-gages.oembed","provider":"WESTport","version":"1.0","type":"link"}