Acme Screw
Nook manufactures precision acme screws and lead screws by thread rolling, thread milling, or thread grinding processes. Each process produces high precision screws with centralized thread forms for smooth, no-wedging performance. We offer the largest selection of rolled acme screw sizes in the industry. Rolled Thread Screws are stocked for quick delivery.
- No noise because there are no rolling components
- Ideal for vertical and light load applications
- Preloaded nut assembly reduces or completely eliminates backlash (wide application scope)
- Safe to operate when the unit has a static load to hold
- Self-locking - no need to apply brakes, even in situations of power outage
- Low cost solution
Literature
Engineering ResourcesAcme Screw - Inch Precision
| Type | Material | Thread Class | Lead Accuracy | Screw Diameter | Screw Lengths |
| Rolled | Alloy Stainless |
Centralizing 2C/Stub Centralizing 2C/Stub |
± 0.0003 in/ft* |
0.75 to 6.00" 0.75 to 1.50" |
Not Limited Not Limited |
| Milled | Alloy Stainless |
Centralizing 2C/3C Centralizing 2C/3C |
± 0.002 in/ft ± 0.002 in/ft |
0.75 to 3.00" |
Up to 96" Up to 96" |
| Ground | Alloy Stainless |
Centralizing 3C/4C Centralizing 2C/3C |
± 0.0005 in/ft ± 0.0005 in/ft |
0.75 to 4.00" 0.75 to 4.00" |
Up to 120" Up to 120" |
* Up to 1.5" dia.
Acme Screw - Inch Precision
Acme Screw and Nut assemblies provide turn key solutions that only require a power source (hand operation or motor). All of the elements are available for quick delivery from shelf stock. Twin-lead acme screws offer dual opposing motion using a single drive system. These one-piece high performance acme screws are made from high alloy steel that is black oxided for protection and can be assembled with Nook PowerAc™ acme nuts, flanges and EZZE-MOUNT™ bearing supports to form cost effective systems.
ACME SCREW - ROLLED
Nook offers the largest selection of rolled acme screw sizes in the industry. Rolled thread screws are cost effective and are stocked for quick delivery.
ACME SCREW - MILLED
Milled thread screws allow more variety in journal machining, particularly where a design requires the journal O.D. to be larger
than the screw major diameter.
ACME SCREW - GROUND
Ground thread screws offer higher lead accuracy for applications where positioning tolerances are extremely critical.
Acme Nut - Inch Precision
Acme Nut - Inch Precision
BRONZE ACME NUT
- Tensile Yield: 50,000 psi
- Tensile Ultimate: 65,000 psi
- Hardness: HB75
- Dynamic co-efficient of friction: 0.125 with Nook Lubricant
PLASTIC ACME NUT
• Tensile Strength @70°F: 8,000 psi
• Compressive Strength @70°F: 16,000 psi
• PV Limit: 2,700 lubricated
• Co-efficient of friction: 0.10 lubricated
Acme Screw - Metric Precision
Acme Screw - Metric Precision
TRAPEZOIDAL SCREW AND NUT
Similar in construction and materials to PowerAc™ Inch Acme Screws and Nuts, the Trapezoidal thread form has been enhanced to include a centralizing thread form to prevent wedging and binding. See the PowerAc™ technical data on pages 54-59 for additional screw and nut details.
Standard lead accuracy: is ±6.25μm / 25mm
Temperature Range: Plastic Nuts: -9° to +79° C
Bronze Nuts: -9° to +177° C
Trapezoidal Lead Nut
Trapezoidal Lead Nut
BRONZE ACME NUT
- Tensile Yield: 50,000 psi
- Tensile Ultimate: 65,000 psi
- Hardness: HB75
- Dynamic co-efficient of friction: 0.125 with Nook Lubricant
PLASTIC ACME NUT
• Tensile Strength @70°F: 8,000 psi
• Compressive Strength @70°F: 16,000 psi
• PV Limit: 2,700 lubricated
• Co-efficient of friction: 0.10 lubricated
Acme Screw Related Products
Acme Screw End Supports
EZZE-MOUNT™ precision bearing blocks can be assembled to ball screws and lead screws screws, providing a complete solution for most linear motion applications. Both end bearing mounts and end machining are offered as a complete assembly.
Acme Screw End Machining
Linear motion applications utilizing a ball screw or an acme screw requires end machining to be matched with precision bearing mounts. Nook offers both end bearing mounts and end machining as a complete assembly.
Acme Screw Lubricant
PAG-1 Grease & E-100 Aerosol Spray
Prolong Reliability and Life
Proper lubrication is the key to continued performance and reliability of acme screw assemblies. Use E-100 spray and PAG-1 grease lubricants to maximize life of your acme screw assembly.
