{"id":1672,"date":"2026-07-16T09:10:09","date_gmt":"2026-07-16T09:10:09","guid":{"rendered":"https:\/\/gearrack.top\/product\/stainless-steel-worm-gear-for-cnc-machinery-din-5-7-m1-m4\/"},"modified":"2026-07-16T09:10:24","modified_gmt":"2026-07-16T09:10:24","slug":"stainless-steel-worm-gear-for-cnc-machinery-din-5-7-m1-m4","status":"publish","type":"product","link":"https:\/\/gearrack.top\/it\/product\/stainless-steel-worm-gear-for-cnc-machinery-din-5-7-m1-m4\/","title":{"rendered":"Stainless Steel Worm Gear for CNC Machinery – DIN 5-7, M1-M4"},"content":{"rendered":"
\n

<\/p>\n

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

Stainless steel worm gears for CNC machinery<\/strong> are precision worm gear and worm wheel sets manufactured to ANSI or DIN standard dimensions \u2014 module M1 to M3 (up to M4), tooth count Z15 to Z70, finished bore, precision grade DIN 5 to DIN 7, pressure angle 20\u00b0, surface hardness 55\u201360 HRC. Available in stainless steel, 1045 carbon steel, SCM 415 alloy steel, brass, bronze, aluminium alloy, copper, POM, nylon, PA66, MC, PEER, MSM, and Delrin. Korea Ever-Power’s stainless steel worm gears for CNC machinery are the specification choice for corrosion-resistant, precision, high-load worm drive applications in CNC machines, electronic and electrical equipment, food processing machinery, chemical machinery, and all environments where corrosion resistance is as important as gear precision.<\/p>\n

Produced to ISO 9001:2008 certified quality management. Full machining process from material preparation through normalising, rough turning, heat treatment, semi-finish turning, thread\/spiral surface machining, inner hole and keyway finishing, grinding, and final product inspection \u2014 all in-house at Korea Ever-Power’s manufacturing facility.<\/p>\n<\/p><\/div>\n<\/div>\n

The stainless steel worm gear’s defining advantage over carbon steel worm gears is corrosion resistance at the tooth surface \u2014 the ground stainless steel worm thread maintains its surface finish and dimensional accuracy in humid, wet, or chemically aggressive environments where a carbon steel worm would rust and lose its precision within months. For CNC machinery operating in coolant-rich environments, the stainless worm gear’s ability to maintain tooth accuracy through years of coolant exposure is the primary specification driver.<\/p>\n

<\/p>\n

Technical Specifications<\/h2>\n
\n
\n

Product Parameters<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Product Name<\/td>\nWorm Gear and Worm Wheel<\/td>\n<\/tr>\n
Module Range<\/td>\nM1 \u2013 M4 (M1~M3 standard)<\/td>\n<\/tr>\n
Tooth Count<\/td>\nZ15 \u2013 Z70<\/td>\n<\/tr>\n
Precision Grade<\/td>\nDIN 5 to DIN 7<\/td>\n<\/tr>\n
Pressure Angle<\/td>\n20\u00b0<\/td>\n<\/tr>\n
Hardness<\/td>\n55\u201360 HRC<\/td>\n<\/tr>\n
Bore Type<\/td>\nFinished bore; pilot bore; special request<\/td>\n<\/tr>\n
Standard<\/td>\nANSI, DIN \u2014 strictly followed<\/td>\n<\/tr>\n
Surface Treatment<\/td>\nCarburising and quenching, tempering, tooth surface high-frequency quench hardening<\/td>\n<\/tr>\n
Certificate<\/td>\nISO 9001:2008<\/td>\n<\/tr>\n
Confezione<\/td>\nWooden case\/container and pallet; or made-to-order<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n
\n

Materials Available<\/p>\n\n\n\n\n\n\n\n\n\n\n
Category<\/th>\nMaterial Options<\/th>\n<\/tr>\n<\/thead>\n
Stainless Steel<\/td>\nSS304, SS316, SS316L \u2014 corrosion-resistant, food-safe, CNC machinery<\/td>\n<\/tr>\n
Carbon Steel<\/td>\n1045 carbon steel \u2014 standard industrial worm gear material<\/td>\n<\/tr>\n
Alloy Steel<\/td>\nSCM415 (20CrMo) \u2014 carburised, high surface hardness, DIN 5 precision<\/td>\n<\/tr>\n
Bronze \/ Brass<\/td>\nTin bronze, aluminium bronze, brass \u2014 worm wheel material<\/td>\n<\/tr>\n
Aluminium \/ Copper<\/td>\nAluminium alloy, copper \u2014 lightweight and electrical applications<\/td>\n<\/tr>\n
Engineering Plastic<\/td>\nPOM, nylon (PA66), MC, PEER, MSM, Delrin \u2014 light duty, corrosion-free<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/div>\n

<\/p>\n

Standard Dimension Reference (Module M1.0 \u2013 M2.5)<\/h2>\n

\"Brass<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Module<\/th>\nTeeth (Z)<\/th>\nBore Straight \/ Keyway (mm)<\/th>\nB (mm)<\/th>\nC (mm)<\/th>\nD (mm)<\/th>\nDirection<\/th>\n<\/tr>\n<\/thead>\n
M1.0<\/td>\n20<\/td>\n6 \/ 8<\/td>\n8<\/td>\n10<\/td>\n18<\/td>\nL (Left)
R (Right)<\/td>\n<\/tr>\n
22\u201328<\/td>\n8 \/ 8\u201313<\/td>\n<\/tr>\n
30\u201348<\/td>\n10 \/ 10\u201317<\/td>\n<\/tr>\n
50\u201370<\/td>\n12 \/ 12\u201317<\/td>\n<\/tr>\n
80\u2013100<\/td>\n15 \/ 15\u201330<\/td>\n<\/tr>\n
M1.5<\/td>\n20\u201326<\/td>\n12 \/ 12\u201317<\/td>\n12<\/td>\n12<\/td>\n24<\/td>\n<\/tr>\n
28\u201344<\/td>\n15 \/ 15\u201330<\/td>\n<\/tr>\n
45\u201352<\/td>\n18 \/ 18\u201340<\/td>\n<\/tr>\n
60\u2013100<\/td>\n20 \/ 20\u201350<\/td>\n<\/tr>\n
M2.0<\/td>\n15\u201318<\/td>\n12 \/ 12\u201317<\/td>\n16<\/td>\n13<\/td>\n29<\/td>\n<\/tr>\n
20\u201328<\/td>\n15 \/ 15\u201322<\/td>\n<\/tr>\n
30\u201336<\/td>\n18 \/ 18\u201340<\/td>\n<\/tr>\n
40\u201348<\/td>\n20 \/ 20\u201344<\/td>\n<\/tr>\n
50\u2013100<\/td>\n25 \/ 25\u201360<\/td>\n<\/tr>\n
M2.5<\/td>\n15\u201318<\/td>\n15 \/ 15\u201330<\/td>\n20<\/td>\n14<\/td>\n34<\/td>\n<\/tr>\n
20\u201324<\/td>\n18 \/ 18\u201340<\/td>\n<\/tr>\n
25\u201336<\/td>\n20 \/ 20\u201350<\/td>\n<\/tr>\n
40\u201360<\/td>\n25 \/ 25\u201370<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

B = face width (mm); C = hub length (mm); D = hub OD (mm). L\/R = left\/right helix direction. M3.0 and above: contact Korea Ever-Power. Full dimension tables for M1.0\u2013M4.0 available on request.<\/p>\n

<\/p>\n

Machining Process<\/h2>\n

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

Korea Ever-Power’s stainless steel worm gear machining process is a fourteen-stage sequence that produces the 55\u201360 HRC surface hardness and DIN 5\u20137 precision accuracy required for CNC machinery applications:<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Stage<\/th>\nOperation<\/th>\nPurpose<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nMaterial preparation<\/td>\nMaterial certification, chemical composition verification, incoming dimensional check<\/td>\n<\/tr>\n
2<\/td>\nNormalising<\/td>\nRelieve rolling\/forging stresses; homogenise grain structure before machining<\/td>\n<\/tr>\n
3<\/td>\nRough turning<\/td>\nRemove bulk material to near-net shape; establish datum surfaces for subsequent operations<\/td>\n<\/tr>\n
4<\/td>\nQuenching and tempering<\/td>\nAchieve core hardness and toughness; tempering prevents brittleness from quench<\/td>\n<\/tr>\n
5<\/td>\nSemi-finish turning OD<\/td>\nEstablish worm OD to near-final diameter; leave grinding allowance<\/td>\n<\/tr>\n
6<\/td>\nRough turning spiral surface<\/td>\nCut worm thread profile to rough dimensions; leave finish allowance on flanks<\/td>\n<\/tr>\n
7<\/td>\nFinish turning bore, end face, keyway<\/td>\nBore to finished bore AH7 tolerance; machine keyway to DIN 6885 standard<\/td>\n<\/tr>\n
8<\/td>\nSemi-finish turning spiral<\/td>\nReduce spiral surface to pre-grind dimensions with tight allowance<\/td>\n<\/tr>\n
9<\/td>\nSemi-finish grinding OD<\/td>\nGrind OD to pre-final size for concentricity reference<\/td>\n<\/tr>\n
10<\/td>\nSemi-finish grinding spiral<\/td>\nRemove rough machining tool marks from spiral flanks<\/td>\n<\/tr>\n
11<\/td>\nGrinding centre hole<\/td>\nRe-establish centre hole for final grinding reference datum<\/td>\n<\/tr>\n
12<\/td>\nFine grinding OD<\/td>\nFinal OD to drawing tolerance; establishes bearing journal and thread root geometry<\/td>\n<\/tr>\n
13<\/td>\nFine grinding helical surface<\/td>\nFinal thread flank grinding to DIN 5\u20137 accuracy; surface finish Ra 0.4\u20130.8 \u00b5m<\/td>\n<\/tr>\n
14<\/td>\nFinished product inspection<\/td>\nCMM measurement of all critical dimensions; gear measurement for pitch, profile, lead errors; contact pattern check<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

Key Advantages for CNC Machinery<\/h2>\n

\"measuring<\/p>\n

\n
\n

ANSI\/DIN Standard Compliance<\/h3>\n

Produced strictly to ANSI or DIN standard dimensions \u2014 the worm gear is a drop-in replacement for standard catalogue worm gears in the specified module and tooth count. No special adaptation required for worm gearbox units designed to these standards. This interchangeability reduces machine downtime for maintenance parts replacement.<\/p>\n<\/div>\n

\n

DIN 5\u20137 Precision for CNC Accuracy<\/h3>\n

DIN 5 is the highest precision grade available \u2014 pitch error, profile error, and lead error all controlled to DIN 5 tolerances. For CNC machine tool worm drives where the table positioning accuracy depends directly on the worm gear accuracy, DIN 5 is the correct specification. Korea Ever-Power supplies DIN 5, 6, and 7 as standard options \u2014 select based on the required positioning accuracy of the application.<\/p>\n<\/div>\n

\n

55\u201360 HRC Surface Hardness<\/h3>\n

The 55\u201360 HRC thread surface hardness, achieved by carburising and quenching (SCM415 alloy steel) or high-frequency induction hardening (1045 carbon steel), provides the wear resistance required for long service life in continuously-operating CNC machine worm drives. The ground thread surface at this hardness level resists pitting and scuffing fatigue at the highest contact stresses encountered in CNC machine tool worm gear drives.<\/p>\n<\/div>\n

\n

Finished Bore with Keyway<\/h3>\n

Finished bore to AH7 tolerance with optional keyway enables direct installation on the motor or intermediate shaft without additional boring or keyway machining at the customer’s facility. This shortens machine maintenance time and eliminates the dimensional variability that results from field boring operations. Pilot bore is available when the customer requires machining to their own shaft specification.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

Applications<\/h2>\n

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

\n
\n
<\/div>\n

CNC Machinery<\/h3>\n

DIN 5\u20137 stainless steel or alloy steel worm gears in CNC machining centre rotary table drives, CNC lathe turret indexing drives, and CNC grinding machine wheel dressing drives. The combination of corrosion resistance (coolant exposure), precision (DIN 5\u20137), and high surface hardness (55\u201360 HRC) makes Korea Ever-Power stainless worm gears the specified choice for CNC machine tool worm drives operating in coolant-flood environments.<\/p>\n<\/div>\n

\n
<\/div>\n

Electronic and Electrical Appliances<\/h3>\n

M1\u2013M2 stainless steel or POM worm gears in automated electronic assembly equipment, PCB handling drives, and precision electrical appliance adjustment mechanisms. Non-magnetic stainless steel worm gears are required in applications near sensitive magnetic sensors or where magnetic contamination of electronic assemblies is a concern.<\/p>\n<\/div>\n

\n
<\/div>\n

Food Machinery<\/h3>\n

SS316 \/ SS316L stainless steel worm gears in food processing conveyor drives, portioning machine drives, and packaging machine right-angle drives. SS316L is the correct specification for food contact applications \u2014 its low carbon content prevents sensitisation (chromium carbide precipitation at grain boundaries) that would reduce corrosion resistance in the heat of welding or repeated steam sterilisation cycles.<\/p>\n<\/div>\n

\n
\u2697\ufe0f<\/div>\n

Chemical Machinery<\/h3>\n

SS316 stainless steel worm gears in chemical reactor agitator drives, pump drive units, and valve actuator gearboxes in chemical plant service. The molybdenum content of SS316 provides resistance to chloride-induced pitting and crevice corrosion \u2014 the failure mode that eliminates SS304 from chloride-containing chemical environments. Korea Ever-Power supplies material certificates confirming Mo content for chemical industry procurement documentation.<\/p>\n<\/div>\n

\n
<\/div>\n

Environmental Protection Machinery<\/h3>\n

Stainless steel worm gears in wastewater treatment plant aerator drives, sludge scraper drives, and environmental monitoring equipment positioning drives. These are continuous-duty, outdoor or humid-environment applications where the gear drive must operate without maintenance for extended periods. Stainless steel worm gears eliminate the corrosion-related maintenance that plagues carbon steel worm gears in wastewater plant environments.<\/p>\n<\/div>\n

\n
\ufe0f<\/div>\n

Mining, Rubber, and Cement Machinery<\/h3>\n

High-surface-hardness alloy steel (SCM415, carburised to HRC 58\u201362) worm gears in heavy-duty mining conveyor drives, rubber mixing mill auxiliary drives, and cement plant kiln auxiliary drives. The extreme duty cycle and shock loading of these applications require the highest available combination of surface hardness, core toughness, and thread accuracy \u2014 all achievable with Korea Ever-Power’s SCM415 carburised and ground worm gear sets.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

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

What is the difference between 1045 carbon steel and SCM415 alloy steel worm gears?<\/p>\n

1045 carbon steel worm gears are produced by high-frequency induction hardening of the thread surface, achieving HRC 55\u201358 surface hardness with a shallow hardened layer (0.5\u20131.5 mm). This is adequate for moderate duty CNC machinery applications. SCM415 alloy steel (equivalent to 20CrMo) is case-carburised to achieve a 1.0\u20132.0 mm deep hardened layer at HRC 58\u201362, with a tough core at HRC 30\u201340 \u2014 providing superior fatigue life under cyclic contact stress. SCM415 is specified for high-duty-cycle CNC applications and wherever the thread must withstand heavy loads over long service lives. For food machinery, stainless steel (SS316L) is specified regardless of load.<\/p>\n<\/div>\n

\n
\n

What worm gear precision grade is needed for CNC machine tool applications?<\/p>\n

DIN 5 is the correct specification for the most demanding CNC positioning applications \u2014 CNC rotary tables with positioning repeatability requirements of \u00b10.01 mm or better. DIN 6 is adequate for standard CNC machining centre table drives with \u00b10.02\u20130.05 mm positioning repeatability. DIN 7 is the standard for general industrial CNC drives without tight positioning requirements. Korea Ever-Power supplies all three grades; specify the positioning accuracy requirement and Korea Ever-Power will recommend the correct precision grade. Contact our team<\/a> to begin.<\/p>\n<\/div>\n<\/div>\n

<\/p>\n

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

“We manufacture CNC machining centres and use Korea Ever-Power SCM415 worm gears for CNC machinery<\/a> (DIN 6, M2.0, carburised HRC 60) in our rotary table indexing drives. Gear measurement at incoming: pitch error 4.2 \u00b5m, profile error 3.8 \u00b5m \u2014 both within DIN 6 tolerance. Table positioning repeatability: \u00b10.018 mm bidirectional \u2014 within our \u00b10.02 mm specification. 26 months in production; no tooth wear detectable at last inspection.”<\/p>\n

Kim Sang-cheol<\/strong>  |  CNC Machine Tool Design Engineer, Incheon Precision Manufacturing Co.  ·  Q1 2026<\/em><\/p>\n<\/div>\n

\n

“We build food processing conveyor line drives and specified SS316L worm gears M2.5 from Korea Ever-Power. Daily hot washdown at 80\u00b0C with caustic detergent \u2014 no corrosion on thread surface or bore after 20 months. Material certificate with Mo content confirmed: 2.12% Mo \u2014 within SS316L specification. FDA food-grade lubricant compatibility confirmed by Korea Ever-Power before order placement. ISO 9001 certificate supplied for our supplier qualification file.”<\/p>\n

Lee Jae-hyun<\/strong>  |  Food Processing Equipment Engineer, Gyeonggi Food Machinery Co.  ·  Q3 2025<\/em><\/p>\n<\/div>\n<\/div>\n

<\/p>\n

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\n

Request a Quotation for Stainless Steel Worm Gears<\/h3>\n

M1\u2013M4, Z15\u2013Z70, DIN 5\u20137 precision. SS304 \/ SS316 \/ SS316L \/ 1045 \/ SCM415. 55\u201360 HRC. Finished bore or pilot bore. ANSI\/DIN standard. ISO 9001:2008 certified. Full dimension tables and material certificates available.<\/p>\n

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

Stainless steel worm gear for CNC machinery produced strictly to ANSI or DIN standard dimensions. Material: stainless steel, 1045 carbon steel, SCM415 alloy steel, brass, bronze, aluminium alloy, copper, POM, nylon, PA66, MC, PEER, MSM, Delrin. Module: M1\u2013M4. Teeth: Z15\u2013Z70. Bore: finished bore (AH7), pilot bore, or special request. Precision grade: DIN 5 to DIN 7. Pressure angle: 20\u00b0. Hardness: 55\u201360 HRC. Surface treatment: carburising and quenching, tempering, tooth surface high-frequency quench hardening. Processing: moulding, shaving, hobbing, drilling, tapping, reaming, grinding. ISO 9001:2008 certified. Packaging: wooden case\/container and pallet or made-to-order.<\/p>","protected":false},"featured_media":1673,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[4562],"product_tag":[],"class_list":["post-1672","product","type-product","status-publish","has-post-thumbnail","product_cat-worm-gear","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product\/1672","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=1672"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media\/1673"}],"wp:attachment":[{"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/media?parent=1672"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_brand?post=1672"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_cat?post=1672"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/gearrack.top\/it\/wp-json\/wp\/v2\/product_tag?post=1672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}