2"- 4 Single Lead Acme
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 SPECIFICATIONS | RH | LH |
---|---|---|
ALLOY STEEL SCREW PART NO. | AS 200 R 025 A | AS 200 L 025 A |
STAINLESS STEEL SCREW PART NO. | AS 200 R 025 S | AS 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 | 20 FEET* |
*12 feet for stainless steel stock
Nut and Flange Specifications
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NUT SPECIFICATIONS | RH | LH |
---|---|---|
NUT PART NO. | AN 200 R 025 B | AN 200 L 025 B |
NUT WITH FLANGE PART NO. | AF 200 R 025 | AF 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 |
2D/3D Drawings
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Product Media
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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
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 |
DB Bearing Blocks
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 |
FB Bearing Blocks
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 |
SB Screw End Conditions
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 |
DB Screw End Conditions
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 |
FB Screw End Conditions
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 | |