2"- 4 Single Lead Acme

This 2”-4 single lead acme machine screw is available in both alloy steel and stainless steel with a corresponding aluminum bronze nut. Choose from right-hand or left-hand threads.

MACHINE SCREW SPECIFICATIONSRHLH
ALLOY STEEL SCREW PART NO.AS 200 R 025 AAS 200 L 025 A
STAINLESS STEEL SCREW PART NO.AS 200 R 025 SAS 200 L 025 S
THREAD FORM  ACME
SCREW DIAMETER - TURNS / INCH 2" - 4
PITCH / LEAD 0.250 IN.
ROOT DIAMETER 1.695 IN.
SCREW WEIGHT (LB./ FT.) 9.3
TORQUE TO RAISE 1 POUND 0.162 IN.- LB.
MAXIMUM SCREW LENGTH 12 FEET

 

Nut and Flange Specifications


NUT SPECIFICATIONSRH LH
NUT PART NO.AN 200 R 025 BAN 200 L 025 B
NUT WITH FLANGE PART NO.AF 200 R 025AF 200 L 025
DYNAMIC LOAD CAPACITY (LBS.) 20,000
STATIC LOAD CAPACITY (LBS.) 64,000
EFFICIENCY 25.4%
MATERIAL BRONZE
NOMINAL DIAMETER "A" 2.75 IN.
NUT LENGTH "B" 2.75 IN.
THREAD LENGTH "C" 0.880 IN.
THREAD SIZE 2.548-18 UN
FLANGE PART NO.FL-2548
FLANGE DIAMETER "D" 4.94 IN.
FLANGE THICKNESS "E" 0.895 IN.
FLANGE HOLE DIAMETER "F: 0.531 IN
NUMBER OF HOLES IN FLANGE "G" 4
FLANGE BOLT CIRCLE "H" 4.062 IN.
FLANGE MATERIAL BLACK OXIDE COATED STEEL


Click on Product Specifications below to view Bearing Block and Screw End Conditions options available for this screw. 

  • Alloy steel screw
  • Aluminum bronze nut
  • Steel flange with black oxide coating

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.

 

SB Bearing Blocks

Screw NumberBearing Mount No.ABCDEFGHIJK
SS150R038A SB-30 6.500 3.690 1.875 0.875 2.000 2.375 4.750 1.156 2.312 .656 (4x) .906 Thru
AS200R025A 1.375 C'Bore
AS200R050A 2.060 Deep

DB Bearing Blocks

Screw NumberBearing Mount No.ABCDEFGHIJKL
SS150R038A DB-30 6.500 3.690 1.875 0.875 2.000 2.375 4.750 1.156 2.312 .656 (4x) .906 Thru N/A
AS200R025A 1.375 C'Bore
AS200R050A 2.060 Deep

FB Bearing Blocks

Screw NumberBearing Mount No.ABCDEFGHIJKL
SS150R038A FB-30 6.500 3.690 1.875 2.375 6.595 1.156 4.750 N/A 3.225 3.725 .437 Thru .937 Thru
AS200R025A .687 C'Bore 1.375 C'Bore
AS200R050A #8 Taper Pin 2.250 Deep

SB Screw End Conditions

Screw NumberBearing Mount No.o S1A1A2A3A4A5A6o A7A8A9A10A11
SS150R038A SB-30 1.1814 1.275 0.720 0.70 0.190 0.748 1.587 2.43 1.173-18 UNS W-06 N-06 6306
AS200R025A 1.1810 0.188
AS200R050A    

DB Screw End Conditions

Screw NumberBearing Mount No.oS1oS2A1A2A3A4A5A6A7A8A9
SS150R038A DB-30 1.1814 1.000 5.33 3.60 3.047 0.748 0.063 1.173-18 UNS W-06 N-06 1/4 x 1
AS200R025A 1.1810 0.999
AS200R050A    

FB Screw End Conditions

Screw NumberBearing Mount No.oS1oS2A1A2A3A4A5A6A7A8A9A10A11
SS150R038A FB-30 1.1814 1.000 6.67 4.92 4.20 3.300 0.748 1.828 0.075 1.173-18 UNS W-06 N-06 1/4 x 1
AS200R025A 1.1810 0.999
AS200R050A    

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