Acme Screws and Nuts

Joyce/Dayton offers Acme 2C and Stub Acme screw and nut assemblies in a variety of screw leads and in diameters ranging from ½ inch up to 6 inches. Bronze nuts and steel flanges are available for each screw size. Complete assemblies include bearing blocks and finished machining on screw ends. Custom end machining is available. For additional support, submit our Screw and Nut Selection Guide, or Contact Joyce/Dayton with your specific requirements.

  • Standard Acme 2C or Stub Acme threads from 1/2 inch to 6 inch diameter.
  • Standard leads ranging from 0.1 inch to 1.0 inch.
  • Right-hand threads standard – left-hand threads available on most screws.
  • Alloy and stainless steel screws available in many diameters.
  • Screws machined to customer specifications.
  • Bearing blocks available for many screw sizes.*

 

MACHINE SCREW & NUT SELECTIONS       
DIA.-TURNS / INCHTHREADSCREW DESCRIPTIONSCREW LEAD (IN.)STARTSNUT DESCRIPTION (BRONZE)FLANGE & NUT ASSEMBLY
1/2" 8 R SS050R013A 0.125 1 SN050R013B SF050R013
5/8" 8 R SS063R013S 0.125 1 SN063R013B SF063R013
5/8" 8 L SS063L013S 0.125 1 SN063R013B SF063L013
5/8" 4* R SS063R025S 0.250 2 SN063R025B SF063R025
5/8" 4* L SS063L025S 0.250 2 SN063L025B SF063L025
5/8" 2* R SS063R050A 0.500 2 SN063R050B SF063R050
3/4" 5 R AS075R020A 0.200 1 AN075R020B AF075R020
3/4" 5 L AS075L020A 0.200 1 AN075L020B AF075L020
3/4" 5 R AS075R020S 0.200 1 AN075R020B AF075R020
3/4" 5 L AS075L020S 0.200 1 AN075L020B AF075L020
7/8" 2* R AS088R050A 0.500 2 AN088R050B AF088R050
7/8" 2* L AS088L050A 0.500 2 AN088L050B AF088L050
1" 10 R AS100R010A 0.100 1 AN100R010B AF100R010
1" 4 R AS100R025A 0.250 1 AN100R025B AF100R025
1" 4 L AS100L025A 0.250 1 AN100L025B AF100L025
1" 4 R AS100R025S 0.250 1 AN100R025B AF100R025
1" 4 L AS100L025S 0.250 1 AN100L025B AF100L025
1" 2* R AS100R050A 0.500 2 AN100R050B AF100R050
1" 2* L AS100L050A 0.500 2 AN100L050B AF100L050
1" 1** R SS100R100A 1.000 10 SN100R100B SF100R100
1 1/4" 4 R AS125R025A 0.250 1 AN125R025B AF125R025
1 1/4" 4 L AS125L025A 0.250 1 AN125L025B AF125L025
1 1/2" 4 R AS150R025A 0.250 1 AN150R025B AF150R025
1 1/2" 4 L AS150L025A 0.250 1 AN150L025B AF150L025
1 1/2" 2* R AS150R050A 0.500 2 AN150R050B AF150R050
1 1/2" 2* L AS150L050A 0.500 2 AN150L050B AF150L050
1 1/2" 2 2/3 R AS150R038A 0.375 1 AN150R038B AF150R038
1 1/2" 2 2/3 L AS150L038A 0.375 1 AN150L038B AF150L038
1 1/2" 2 2/3 R SS150R038A 0.375 1 SN150R038B SF150R038
1 1/2" 2 2/3 L SS150L038A 0.375 1 SN150L038B SF150L038
1 1/2" 2 2/3 R SS150R038S 0.375 1 SN150R038B SF150R038
1 1/2" 2 2/3 L SS150L038S 0.375 1 SN150L038B SF150L038
2" 4 R AS200R025A 0.250 1 AN200R025B AF200R025
2" 2 R AS200R050A 0.500 1 AN200R050B AF200R050
2" 2 L AS200L050A 0.500 1 AN200L050B AF200L050
2" 2 R AS200R050S 0.500 1 AN200R050B AF200R050
2" 2 L AS200L050S 0.500 1 AN200L050B AF200L050
2 1/4" 4 R AS225R025A 0.250 1 AN225R025B AF225R025
2 1/4" 4 L AS225L025S 0.250 1 AN225L025B AF225L025
2 1/4" 2 R AS225R050A 0.500 1 AN225R050B AF225R050
2 1/4" 2 L AS225L050A 0.500 1 AN225L050B AF225L050
2 1/4" 2 R AS225R050S 0.500 1 AN225R050B AF225R050
2 1/4" 2 L AS225L050S 0.500 1 AN225L050B AF225L050
2 1/2" 4 R AS250R025A 0.250 1 AN250R025B AF250R025
2 1/2" 4 L AS250L025A 0.250 1 AN250L025B AF250L025
2 1/2" 2 R AS250R050A 0.500 1 AN250R050B AF250R050
2 1/2" 2 L AS250L050A 0.500 1 AN250L050B AF250L050
2 1/2" 2 R AS250R050S 0.500 1 AN250R050B AF250R050
2 1/2" 2 L AS250L050S 0.500 1 AN250L050B AF250L050
3 3/8" 1 1/2 R SS338R067A 0.667 1 SN338R067B SF338R067
3 3/8" 1 1/2 L SS338L067A 0.667 1 SN338L067B SF338L067
3 1/2" 1 1/2 R AS350R067A 0.667 1 AN350R067B AF350R067
3 1/2" 1 1/2 L AS350L067A 0.667 1 AN350L067B AF350L067
3 3/4" 1 1/2 R AS375R067A 0.667 1 AN375R067B AF375R067
3 3/4" 1 1/2 L AS375L067A 0.667 1 AN375L067B AF375L067
4 1/2" 1 1/2 R AS450R067A 0.667 1 AN450R067B AF450R067
4 1/2" 1 1/2 L AS450L067A 0.667 1 AN450L067B AF450L067
5" 1 1/2 R AS500R067A 0.667 1 AN500R067B AF500R067
5" 1 1/2 L AS500L067A 0.667 1 AN500L067B AF500L067
6" 1 1/3 R AS600R075A 0.750 1 AN600R075B AF600R075

 All alloy steel screw material is 1045 CDS, except 1/2 inch diameter screws, which are 1018 CDS
 All stainless steel screw material is 316 SS, except 5/8 inch diameter screws, which are 304 SS
* Double lead (2 starts)
**Multiple lead (more than 2 starts)

Note: Bearing blocks used in screw & nut assemblies may not be rated for the same static load as the screws or nuts with which they are used. Contact Joyce/Dayton to verify that bearing blocks are adequately sized for the required loads

Machine Screw    REQUEST A QUOTE

 

   Acme Screw & Nut data sheets

 

   Acme Screws and Nuts Chart

 

   Effect of Change in Parameters

 

   2D/3D Drawings

 

   Ordering Information

 

   Online Screw and Nut Calculator

Ordering Information

Sample Part Number:

Click on the part number to reveal additional information about the screw design and shaft codes.


Thread Form


A: Acme
S: Stub Acme

Component

A: Assembly
S: Screw - without ball nut or bearing mounts

Screw Diameter - Thread direction - TPI (English)

Dia/TPI Code
1/2 – 8 050 R 013 (Stub Acme)
5/8 – 8 * 063 R 013 (Stub Acme)
5/8 – 4 * 063 R 025 (Stub Acme)
5/8 – 2 063 R 050 (Stub Acme)
3/4 – 5 * 075 R 013
7/8 – 2 * 088 R 050
1 –10 100 R 010
1 – 4 * 100 R 025
1 – 2 100 R 050
1 – 1 100 R 100 (Stub Acme)
1 1/4 – 4 125 R 025
1 1/2 – 4 150 R 025
1 1/2 – 2 2/3 150 R 038
1 1/2 – 2 2/3 * 150 R 038 (Stub Acme)
1 1/2 – 2 150 R 050
2 – 4 200 R 025
2 – 2 * 200 R 050
2 1/4 – 4 * 225 R 025
2 1/4 – 2 * 225 R 050
2 1/2 – 4 250 R 025
2 1/2 – 2 * 250 R 050
3 3/8 – 1 1/2 338 R 067 (Stub Acme)
3 1/2 – 1 1/2 350 R 067
3 3/4 – 1 1/2 375 R 067
4 1/2 – 1 1/2 450 R 067
5 – 1 1/2 500 R 067
6 – 1 1/3 600 R 075

R – Right-hand – all thread diameters/leads are available with right hand threads
L – Left-hand *- Substitute an ”L” in the part number for left hand leads
Stub Acme screws offer a larger root diameter than their Acme counterparts
*Available in stainless steel

 

Screw Material

A: Alloy Steel
S: Stainless Steel

Note: not all threads or materials are available for all sizes

First End of Screw

(Flange or threaded end of nut always faces second end)

Bearing Mount Options Machining Options (choose one that corresponds to the bearing block)
SB - Simple Single* 1N – Threaded shaft only
DB - Simple Double 2K –  Thd Shaft w Kwy, 2L – Thd Shaft no Kwy, 2N – Threaded shaft only
FB - Fixed Double 3K –  Thd Shaft w Kwy, 3L – Thd Shaft no Kwy, 3N – Threaded shaft only
XX - No Bearing 4K –  Shaft w Keyway, 4L – Shaft no Keyway, 4N – Support only, XX – No Machining

(When selecting ”XX – No Bearing”, choose from mounting options 1K through 4N  or XX, above)
* All Simple Single bearing mounts are designed for radial loads only

Second End of Screw

(Flange or threaded end of nut always faces away from second end)

Bearing Mount Options Machining Options (choose one that corresponds to the bearing block)
SB - Simple Single* 1N – Threaded shaft only
DB - Simple Double 2K –  Thd Shaft w Kwy, 2L – Thd Shaft no Kwy, 2N – Threaded shaft only
FB - Fixed Double 3K –  Thd Shaft w Kwy, 3L – Thd Shaft no Kwy, 3N – Threaded shaft only
XX - No Bearing 4K –  Shaft w Keyway, 4L – Shaft no Keyway, 4N – Support only, XX – No Machining

(When selecting ”XX – No Bearing”, choose from mounting options 1K through 4N  or XX, above)
* All Simple Single bearing mounts are designed for radial loads only

Nut Properties

B - Bronze
X - Do Not Include Nut in Assembly

Other Options

F - Include Flange
X - Do Not Include a Flange

Screw Length 000.00"

Enter value in inches with decimal if needed
Note that available screw length varies among screw sizes.

 

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