2"- 2 Single Lead Acme

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2"- 2 Single Lead Acme

2"- 2 Single Lead Acme

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

Machine screw specifications RH LH
Alloy steel screw part no. AS 200 R 050 A AS 200 L 050 A
Stainless steel screw part no. AS 200 R 050 S AS 200 L 050 S
Thread form  Acme
Screw diameter - turns/inch 2" - 2
Pitch/Lead 0.500 in.
Root diameter 1.435 in.
Screw weight (lb./ft.) 8.1
Torque to raise 1 pound 0.195 in.-lb.
Maximum screw length 20 feet*

*12 feet for stainless steel stock

Nut and Flange Specifications

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Nut specifications RH LH
Nut part number AN 200 R 050 B AN 200 L 050 B
Nut with flange AF 200 R 050 AF 200 L 050
Dynamic load capacity (lbs.) 20,000
Static load capacity (lbs.) 64,000
Efficiency 41.9%
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 number 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

2D/3D Drawings

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Product Media

2D/3D DRAWINGS2"-2 DATA SHEET SB BEARING BLOCKS AND SCREW ENDS DB BEARING BLOCKS AND SCREW ENDS FB BEARING BLOCKS AND SCREW ENDS EFFECT OF CHANGE IN PARAMETERS SCREW & NUT CALCULATOR
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  • Alloy steel or stainless 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.

Model Number

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

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Screw Number Bearing Mount No. A B C D E F G H I J K
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

FB Bearing Blocks

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Screw Number Bearing Mount No. A B C D E F G H I J K L
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

DB Bearing Blocks

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Screw Number Bearing Mount No. A B C D E F G H I J K L
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

SB Screw End Conditions

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Screw Number Bearing Mount No. o S1 A1 A2 A3 A4 A5 A6 o A7 A8 A9 A10 A11
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    

FB Screw End Conditions

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Screw Number Bearing Mount No. oS1 oS2 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11
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    

DB Screw End Conditions

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Screw Number Bearing Mount No. oS1 oS2 A1 A2 A3 A4 A5 A6 A7 A8 A9
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    
 
 
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