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Worm Drive

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Here are some great find on ebay for Worm Drive

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Skilsaw Professional Model 77 7-1/4 Worm Drive Saw


Skilsaw Professional Model 77 7-1/4 Worm Drive Saw


$100.00


SKIL 7-1/4


SKIL 7-1/4″ CIRCULAR SAW WORM DRIVE HD 77 – HD77 USA


$39.99


Bosch Wormdrive saw 1677md


Bosch Wormdrive saw 1677md


$32.20


Prazi USA PR7000 Beam Cutter for 7-1/4-Inch Worm Drive Saws


Prazi USA PR7000 Beam Cutter for 7-1/4-Inch Worm Drive Saws


$76.50


Skil SHD77 15 Amp 7-1/4-Inch Worm Drive Saw $323.00 TADD


Skil SHD77 15 Amp 7-1/4-Inch Worm Drive Saw $323.00 TADD


$65.00


Skil Power Tools SHD77M 7-1/4


Skil Power Tools SHD77M 7-1/4″ WORM DRIVE SAW


$232.68


Robt. Bosch Tool 1677M 7-1/4


Robt. Bosch Tool 1677M 7-1/4″14# WORM DRIVE SAW


$242.88


Milwaukee armature 16-70-0172 for 6377 worm drive saw


Milwaukee armature 16-70-0172 for 6377 worm drive saw


$46.99


Skil Worm Drive Saw TOP HANDLE Grey NEW OEM Fits 77 & HD77 2610990138 1619X01422


Skil Worm Drive Saw TOP HANDLE Grey NEW OEM Fits 77 & HD77 2610990138 1619X01422


$11.95


Skilsaw WORM DRIVE SAW CORD 14 Gauge 9 Ft NEW Fits Skil 77 and HD77 1619X01570


Skilsaw WORM DRIVE SAW CORD 14 Gauge 9 Ft NEW Fits Skil 77 and HD77 1619X01570


$16.95


NEW Milwaukee 6577-20 7-1/4


NEW Milwaukee 6577-20 7-1/4″ 15 Amp Worm Drive Circular


$149.99


7 1/4


7 1/4″ x 40 Carbide Circular Worm Drive Table Saw Blade


$12.95


Makita 5477NB 7-1/4


Makita 5477NB 7-1/4″ WORM DRIVE SAW


$141.65


Makita Hypoid Worm Drive Saw 5477NB


Makita Hypoid Worm Drive Saw 5477NB


$159.99


SkilSaw HD77 7-1/4


SkilSaw HD77 7-1/4″ 13A Worm Drive Circular Saw.


$45.00


DeWalt DWS535R 7 1/4


DeWalt DWS535R 7 1/4″ Worm Drive Circular Saw (Recon DWS535) w/Warranty


$169.00


DeWalt DWS535T 7-1/4


DeWalt DWS535T 7-1/4″ Worm Drive Circular Saw (Used)*


$129.99


SKILSAW 5860 Professional 8 1/4


SKILSAW 5860 Professional 8 1/4″ Worm Drive Saw


$34.00


Lot of 2 Skilsaw Worm-Drive 77 24-Tooth 7-1/4


Lot of 2 Skilsaw Worm-Drive 77 24-Tooth 7-1/4″ Saw Blade


$19.00


NEW SKILSAW 6 1/2


NEW SKILSAW 6 1/2″ WORM DRIVE SAW MODEL 367 CIRCULAR SAW


$202.50


NEW SKILSAW 7 1/4


NEW SKILSAW 7 1/4″ WORM DRIVE SAW MODEL 77 CIRCULAR SAW


$99.99


NEW MILWAUKEE 7 1/4


NEW MILWAUKEE 7 1/4″ WORM DRIVE SAW MODEL 6377 CIRCULAR SAW


$99.99


***SKILSAW HD77 CORDED 7 1/4


***SKILSAW HD77 CORDED 7 1/4″ WORM DRIVE CIRCULAR SAW USED WORKS GREAT!***


$50.00


Skilsaw Model 107 10


Skilsaw Model 107 10″ Super Duty Worm Drive Saw


$324.99


DeWalt DWS535T 7-1/4


DeWalt DWS535T 7-1/4″ Worm Drive Circular Saw (Used)*


$139.99


Skil Mag 77 7.25 Worm Drive


Skil Mag 77 7.25 Worm Drive


$125.00


Black And Decker 4500 Rpm 6.5


Black And Decker 4500 Rpm 6.5″ Wormdrive Heavy Duty


$19.99


skilsaw 77 base table foot platform worm drive


skilsaw 77 base table foot platform worm drive


$15.00


Sears Craftsman Industrial 7-1/4


Sears Craftsman Industrial 7-1/4″ Worm Drive Saw


$50.00


WATER KIT FOR YOUR  WORM DRIVE SAW


WATER KIT FOR YOUR WORM DRIVE SAW


$50.00


DEWALT 7 1/4


DEWALT 7 1/4″ Worm Drive Circular Saw DWS535R


$179.00


8-1/4 24T ATB CarbTip Ptbl/WormDrive Circular Saw Blade


8-1/4 24T ATB CarbTip Ptbl/WormDrive Circular Saw Blade


$30.00


DeWalt DWS535 7-1/4


DeWalt DWS535 7-1/4″ Wormdrive Circular Saw


$202.04


Skilsaw 15 Amp, Worm Drive Saw, #SHD77


Skilsaw 15 Amp, Worm Drive Saw, #SHD77


$39.99


Skil SHD77 15 Amp 7-1/4-Inch Worm Drive Saw


Skil SHD77 15 Amp 7-1/4-Inch Worm Drive Saw


$203.30


RIDGID 15 Amp 7-1/4 in. Worm Drive Circular Saw Magnesium Bevel R32102


RIDGID 15 Amp 7-1/4 in. Worm Drive Circular Saw Magnesium Bevel R32102


$35.00


Prazi USA PR7000 Beam Cutter for 7-1/4-Inch Worm Drive Saws


Prazi USA PR7000 Beam Cutter for 7-1/4-Inch Worm Drive Saws


$180.50


10 Pack BOSCH 7-1/4


10 Pack BOSCH 7-1/4″ 24T Framing Worm Drive Circular Skil Saw Blades WD724B10


$39.00


Skil SHD77M 15 Amp 7-1/4-Inch Mag Worm Drive Circular Saw


Skil SHD77M 15 Amp 7-1/4-Inch Mag Worm Drive Circular Saw


$381.16


DeWALT DWS535 7-1/4


DeWALT DWS535 7-1/4″ Worm Drive Circular Saw NEW


$179.99


NEW IN BOX MAKITA 5477NB 7 1/4


NEW IN BOX MAKITA 5477NB 7 1/4″ 15 AMP HYPOID WORM DRIVE CIRCULAR SAW WITH BLADE


$124.95


Skilsaw model 77 wormdrive


Skilsaw model 77 wormdrive


$24.45


Skilsaw model: 5860 8 1/4 Worm drive circular saw with ELECTRIC BRAKE  SEE VIDEO


Skilsaw model: 5860 8 1/4 Worm drive circular saw with ELECTRIC BRAKE SEE VIDEO


$175.00


SKIL SHD77 NEW WORM DRIVE CIRCULAR 7-1/4 SKILSAW 15 Amp Skil Warranty Brand New


SKIL SHD77 NEW WORM DRIVE CIRCULAR 7-1/4 SKILSAW 15 Amp Skil Warranty Brand New


$144.99


DEWALT 7-1/4-in Worm Drive Circular Saw with Twistlock Plug DWS535T NEW


DEWALT 7-1/4-in Worm Drive Circular Saw with Twistlock Plug DWS535T NEW


$209.99


Milwaukee Worm Drive Saw with Blade (pre-owned)


Milwaukee Worm Drive Saw with Blade (pre-owned)


$129.99


Skilsaw Model 77 Type 17 Professional Worm Drive Saw 7-1/4


Skilsaw Model 77 Type 17 Professional Worm Drive Saw 7-1/4″ Used


$20.50


Saw Muzzle by Shave Away SMS for Worm Drive Saws


Saw Muzzle by Shave Away SMS for Worm Drive Saws


$49.99


SKILSAW 7-1/4 #377 DIAMOND ARBOR 40-TEETH WORM DRIVE BLADE


SKILSAW 7-1/4 #377 DIAMOND ARBOR 40-TEETH WORM DRIVE BLADE


$5.95


40 Pc Hose Clamp Set Hose Clamps Hose Clamp Kit Zinc Worm Drive Clamp Fastner


40 Pc Hose Clamp Set Hose Clamps Hose Clamp Kit Zinc Worm Drive Clamp Fastner


$9.99


SkilSaw HD77M Worm Drive Circular Saw 7 1/4


SkilSaw HD77M Worm Drive Circular Saw 7 1/4″ No Reserve


$0.01


Porter-Cable Razor 7 1/4


Porter-Cable Razor 7 1/4″ Saw Blade 20 Teeth C3 Carbide Framer Worm Drive


$16.99


7-1/4


7-1/4″WORM DRIVE SAW


$99.49


NEW 8-1/4 Circular Saw Wormdrive Ea. Electric Circular Saws HD5860


NEW 8-1/4 Circular Saw Wormdrive Ea. Electric Circular Saws HD5860


$292.00


Milwaukee Circular Saw 7 1/4


Milwaukee Circular Saw 7 1/4″ Worm Drive 6577-20 with Twist Plug – Free Shipping


$149.99


NEW 7 1/4 Worm Drive Circular Saw Ea. Electric Circular Saws SHD77


NEW 7 1/4 Worm Drive Circular Saw Ea. Electric Circular Saws SHD77


$240.02


Skil Worm Drive Saw TOP HANDLE Red NEW OEM Fits 77 & HD77 2610990139 1619X01423


Skil Worm Drive Saw TOP HANDLE Red NEW OEM Fits 77 & HD77 2610990139 1619X01423


$11.95


Skil Worm Drive Saw HANDLE Red Pistol Grip For 77 & HD77 2610992564 1619X01364


Skil Worm Drive Saw HANDLE Red Pistol Grip For 77 & HD77 2610992564 1619X01364


$14.95


SKILSAW MODEL HD77 WITH WORM DRIVE


SKILSAW MODEL HD77 WITH WORM DRIVE


$59.00


Skil 7-1/4-in Magnesium Worm Drive Skilsaw SHD77M NEW


Skil 7-1/4-in Magnesium Worm Drive Skilsaw SHD77M NEW


$195.98


3 BOSCH 7-1/4


3 BOSCH 7-1/4″ 24T FRAMING WORM DRIVE CIRCULAR SAW BLADES WD724


$19.99


Skil 7-1/4-in Worm Drive Skilsaw SHD77 NEW


Skil 7-1/4-in Worm Drive Skilsaw SHD77 NEW


$175.98


MAKITA 5277B 7 1/4


MAKITA 5277B 7 1/4″ WORM DRIVE CIRCULAR SAW


$59.00


DeWalt DWS535R 7 1/4


DeWalt DWS535R 7 1/4″ Worm Drive Circular Saw (Recon DWS535) w/Warranty


$169.00


Milwaukee 7-1/4-in Worm Drive Circular Saw 6477-20 NEW


Milwaukee 7-1/4-in Worm Drive Circular Saw 6477-20 NEW


$186.98


Bosch Power Tools Skil Worm Drive Switch 2610321608


Bosch Power Tools Skil Worm Drive Switch 2610321608


$13.99


Tandberg Data Lto-4 Worm Tape Drive - Lto-4 - 800gb (native)/1.6tb (compressed)


Tandberg Data Lto-4 Worm Tape Drive – Lto-4 – 800gb (native)/1.6tb (compressed)


$1,622.80


Bosch Power Tools Skil Worm Drive Replacement Cord 1619X01570


Bosch Power Tools Skil Worm Drive Replacement Cord 1619X01570


$15.25


SKIL-BASE PLATE FOR 77 WORM DRIVE-2610352080


SKIL-BASE PLATE FOR 77 WORM DRIVE-2610352080


$24.00


7-1/4


7-1/4″ WORM DRIVE SAW CHIG0252


$99.49


Bosch 7-1/4


Bosch 7-1/4″ Worm Drive Construction Saw w/ Direct Connect 1677MD NEW


$186.98


Skilsaw BLADE GUARD SPRING For 77 & HD 77 Worm Drive Skil Saw Type 15 2610352138


Skilsaw BLADE GUARD SPRING For 77 & HD 77 Worm Drive Skil Saw Type 15 2610352138


$4.95


Skil Reconditioned 15 Amp 7-1/4


Skil Reconditioned 15 Amp 7-1/4″ Worm Drive Saw SHD77


$159.00


NEW Skil 2610321608 On Off Switch for Wormdrive HD77


NEW Skil 2610321608 On Off Switch for Wormdrive HD77


$18.99


Skil 7-1/4-in Worm Drive Skilsaw with Twist Lock SHD77-72 NEW


Skil 7-1/4-in Worm Drive Skilsaw with Twist Lock SHD77-72 NEW


$195.98


Bosch Worm Drive Rip Fence WD7RIP NEW


Bosch Worm Drive Rip Fence WD7RIP NEW


$18.98


Bosch 7 1/4


Bosch 7 1/4″ Worm Drive Saw 1677M


$227.99


Skilsaw WORM DRIVE SAW REPLACEMENT BLADE BOLT Skil 77 & HD 77 Saws 2610000050


Skilsaw WORM DRIVE SAW REPLACEMENT BLADE BOLT Skil 77 & HD 77 Saws 2610000050


$5.95


5 BOSCH 7-1/4 CARBIDE CIRCULAR SAW BLADE WORM DRIVE 24T


5 BOSCH 7-1/4 CARBIDE CIRCULAR SAW BLADE WORM DRIVE 24T


$24.99


7-1/4


7-1/4″ Worm Drive Professional Industrial Framing Saw


$116.99


Bosch Power Tools 7-1/4


Bosch Power Tools 7-1/4″ Premium Carbide Worm Drive Blade 76924B25


$11.99


Skil SHD77 7-1/4


Skil SHD77 7-1/4″ Worm Drive Skilsaw


$95.00


New DeWalt DWS535 7-1/4-inch Worm Drive Circular Saw


New DeWalt DWS535 7-1/4-inch Worm Drive Circular Saw


$224.99


Milwaukee 7 1/4


Milwaukee 7 1/4″ 15A Worm Drive Saw 6477-20


$209.99


Skil HD77 Circular Worm Drive Saw AUX HANDLE 1619X01422


Skil HD77 Circular Worm Drive Saw AUX HANDLE 1619X01422


$7.99


Milwaukee 7-1/4


Milwaukee 7-1/4″ Worm Drive Saw 6477-20


$207.50


54 Series Worm Drive Clamps -54 combo hex 21/8


54 Series Worm Drive Clamps -54 combo hex 21/8″ to 4″hose clamp Set of: 10 5456


$19.90


54 Series Worm Drive Clamps -54 combo hex 17/8


54 Series Worm Drive Clamps -54 combo hex 17/8″-33/4″hose clamp Set of: 10 5452


$18.40


Ideal 57 Series Worm Drive Clamps -3-1/8


Ideal 57 Series Worm Drive Clamps -3-1/8″ to 5″ 1/2″ss bandclamp Set of: 10


$19.90


SKIL MAG 77-75 75th Anniversary 7-1/4-Inch Magnesium Worm Drive Circular Saw


SKIL MAG 77-75 75th Anniversary 7-1/4-Inch Magnesium Worm Drive Circular Saw


$209.99


Skilsaw LOWER BLADE GUARD Model 77 / HD 77 Worm Drive Saw Type 17 NEW 1619X01362


Skilsaw LOWER BLADE GUARD Model 77 / HD 77 Worm Drive Saw Type 17 NEW 1619X01362


$14.95


Skil 77 REPLACEMENT SHOE CARRIAGE BOLT For 77 / HD77 Worm Drive Saws 2610016325


Skil 77 REPLACEMENT SHOE CARRIAGE BOLT For 77 / HD77 Worm Drive Saws 2610016325


$3.95


Skilsaw BLADE GUARD SPRING 77 & HD 77 Worm Drive Saw Types 10-15 2610023414


Skilsaw BLADE GUARD SPRING 77 & HD 77 Worm Drive Saw Types 10-15 2610023414


$7.95


Skilsaw UPPER BLADE GUARD Aluminum Fits 77 & HD 77 Worm Drive Saw NEW 1619X01171


Skilsaw UPPER BLADE GUARD Aluminum Fits 77 & HD 77 Worm Drive Saw NEW 1619X01171


$16.95


Skilsaw Steel RIP FENCE Adjustable New Fits Skil 77/HD77 Worm Drive Saws 13896


Skilsaw Steel RIP FENCE Adjustable New Fits Skil 77/HD77 Worm Drive Saws 13896


$15.95


Skil SHOE MOUNT HINGE PIN New Fits 77/HD77 Worm Drive Saws 2610319932 1619X01263


Skil SHOE MOUNT HINGE PIN New Fits 77/HD77 Worm Drive Saws 2610319932 1619X01263


$7.95


Skilsaw STEEL SHOE / FOOT New Fits 77/HD77 Worm Drive Saws 2610352080 1619X01350


Skilsaw STEEL SHOE / FOOT New Fits 77/HD77 Worm Drive Saws 2610352080 1619X01350


$36.95


Skil PIVOT BOLT LOCK NUT Fits 77/HD77 Worm Drive Saws New 2610356026 2610932460


Skil PIVOT BOLT LOCK NUT Fits 77/HD77 Worm Drive Saws New 2610356026 2610932460


$3.95


Skilsaw WORM DRIVE SAW LUBRICANT Gear Oil NEW 80111


Skilsaw WORM DRIVE SAW LUBRICANT Gear Oil NEW 80111


$11.95


Skilsaw BLADE ARBOR/SPACER For 77/HD77 Worm Drive Saws New 2610352118 1619X01249


Skilsaw BLADE ARBOR/SPACER For 77/HD77 Worm Drive Saws New 2610352118 1619X01249


$9.95

How many teeth do I need on a wheel to get a 50:1 reduction with a worm drive?

I have an ingoing DC motor shaft that rotates at 3000 rpm, and I want to gear it down with a worm drive to 60 rpm. That’s a 50:1 reduction. If I have a 2 start worm, do I need a 100 teeth wheel? Doesn’t this mean the worm will be really short and the cog very large? How can I make everything fit?

N1*T1 =N2*T2
3000*T1=60*T2
T2/T1=3000/60
T2/T1=50
T2=50*TI
T2=50*2
T2=100

So, as per calculation you are right.

But, you have not mentioned type of load and total torque it has to withstand , you should consider on your own and select the worm wheel.

Since the ratio is not to large you can go for single stage gear unit.

5:1 to 75:1 is the range that can be achieved with worm reducer only.

It is a matter of design and you have to consider many factors as mentioned in the link provided by the other answerer and application and place of use .[ I mean a new system or improvement]

Edit: In 2 start worm , you will get double angular rotation of worm wheel than you are getting with 1 start.


KitchenAid W10112253 Worm Gear


KitchenAid W10112253 Worm Gear


$1.95


The KitchenAid W10112253 Worm Gear fits models K45 K45A K45SS KSM90 K5 K5A K5SS KSM5 KSMC50 KSM150 KPM5 KSM50 KSMC50 KPM50 KP50…

KitchenAid mixer 4162897 worm gear.


KitchenAid mixer 4162897 worm gear.


$1.95


KitchenAid mixer worm gear. May have 241803 printed on it and may be gray or yellow. Fits older generation KitchenAid mixers K45, K5, KSM90, KSM150, and variations of these models….

KitchenAid mixer 4162101 worm gear assembly.


KitchenAid mixer 4162101 worm gear assembly.


$6.34


KitchenAid mixer worm gear, located in planetary. Fits older generation KitchenAid mixers K45, K5, KSM90, KSM150, and variations of these models….

Worm Drive The Musical


Worm Drive The Musical


$17.89


Farmer Ron and Farmer John take you on a Worm Drive…

Popcorn [VHS]


Popcorn [VHS]


$32.92



Chamberlain LiftMaster Sears Craftsman 41C4220A Gear & Sprocket Assembly Kit


Chamberlain LiftMaster Sears Craftsman 41C4220A Gear & Sprocket Assembly Kit


$23.60


Compatible with fail safe units from Liftmaster, Chamberlain, Craftsman, Sears, Master Mechanic and Wayne Dalton. Compatible with 2245, 2255, 2265, 2265-267, PD210, PD212, PD610, PD612K, 1200 Series, 1240, 1245, 1245-266, 1246, 1250, 1250-266, 1255, 1255-166, 1255-266, 1256, 1260, 1260-166, 1260-266, 1265, 1265-267 and more. Not all models listed….

Sears Craftsman Liftmaster Gear & Sprocket Assembly


Sears Craftsman Liftmaster Gear & Sprocket Assembly


$22.15


Compatible with CHAIN DRIVE units from Liftmaster, Chamberlain, Craftsman, Sears, Master Mechanic and Wayne Dalton. Compatible with 2245, 2255, 2265, 2265-267, PD210, PD212, PD610, PD612K, 1200 Series, 1240, 1245, 1245-266, 1246, 1250, 1250-266, 1255, 1255-166, 1255-266, 1256, 1260, 1260-166, 1260-266, 1265, 1265-267 and more. Not all models listed….

Skil 5480-01 13 Amp 7-1/4-Inch Circular Saw Kit


Skil 5480-01 13 Amp 7-1/4-Inch Circular Saw Kit


$49.98


Skil, 7-1/4″, 13A, Circular Saw, 2.3HP Motor With Ball Bearing Construction, Includes: 18T Carbide Blade, Rear Lever Depth Adjustment For Quick Cut Depth Changes, Safety Lock Out Switch Minimizes Accidental Starts, 15% More Speed For Faster Cuts, Better Finish, 1/2 LB Less Weight Reduces User Fatigue, 20% Wider Foot Makes Saw More Stable, 2 Point Line Of Cut For Cutting Accuracy, Anti-Snag Lower G…

Can We Travel Faster Than Light?


Can We Travel Faster Than Light?


$1.99



LTO Ultrium 4 800GB/1.6TB


LTO Ultrium 4 800GB/1.6TB


$16.26


Quantum media cartridges are manufactured to the highest industry standards for quality and reliability ensuring low error rates high performance and long-term durability. Quantum media allows you to archive your data with confidence. The Quantum media family offers you more choices to better manage your data over time and now includes LTO Ultrium tape cartridges. Our LTO Ultrium tape format has b…

Are You Ready for The Worm Drive? Computer Chronicles (1988)

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