What Is a 1605 Ball Screw Nut?
Product Function
A 1605 ball screw nut works together with a matched 1605 ball screw shaft to convert rotary motion into smooth and stable linear movement. The internal ball circulation structure helps reduce friction and improves transmission efficiency compared with ordinary sliding screws.
Replacement and Assembly Use
DLY supplies 1605 ball screw nuts for replacement, repair and new SFU1605 ball screw assembly. Send us your nut photo, drawing or screw model, and we can help confirm the suitable type before production.
Selection note: "1605" only confirms the screw diameter and lead. The nut type, circuit number, flange size, overall length and matching clearance still need to be checked before ordering.
Quick Specification
Basic information for 1605 ball screw nut selection.
| Item | Specification |
|---|---|
| Product Name | 1605 Ball Screw Nut |
| Suitable Screw Diameter | 16mm |
| Lead | 5mm |
| Common Ball Diameter | 3.175mm |
| Common Nut Types | SFU1605, DFU1605, SCM1605, SFA1605, SFNU1605 |
| Supply Form | Nut only / ball screw with nut / machined ball screw assembly |
| Applications | CNC machines, engraving machines, 3D printers, automation slides, linear modules and testing equipment |
SFU1605 Ball Screw Nut Dimensions
Reference data for common SFU1605 single ball screw nut models.
I: Lead | Da: Ball Dia. | N: Number of bead turns / circuit number | K: Rigidity stiffness (kgf/μm) | Ca / Coa: Basic dynamic and static load rating (kgf)
| Model Type | Reference Data Dimensions of Ball Screw and Nut | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | I | Da | D | A | B | L | W | X | H | Q | N | Ca | Coa | K | |
| SFU1604-4 | - | 4 | 2.381 | 28 | 48 | 10 | 40 | 38 | 5.5 | 40 | M6 | 4 | 629 | 1270 | 35 |
| SFU1605-3 | - | 5 | 3.175 | 28 | 48 | 10 | 43 | 38 | 5.5 | 40 | M6 | 3 | 765 | 1240 | 17 |
| SFU1605-4 | 16 | 5 | 3.175 | 28 | 48 | 10 | 50 | 38 | 5.5 | 40 | M6 | 4 | 780 | 1790 | 20 |
Need 1605 Ball Screw Nut Price?
Send us your model, quantity, drawing or original nut photo. DLY can help confirm whether you need SFU1605-3, SFU1605-4, DFU1605, SCM1605 or a matched ball screw assembly.
Email: dlyexport2@dlybearing.com | WhatsApp: +86 16605788856
SFU1605-3 vs SFU1605-4
Choose by nut length, circuit number, load requirement and installation space.
SFU1605-3
SFU1605-3 is more suitable for compact equipment and standard load applications. It has a shorter nut body and is often used where installation space is limited.
SFU1605-4
SFU1605-4 has a longer nut body and higher static load rating in the reference data. It is more suitable for buyers who need better support and more stable repeated movement.
| Model | Lead | Ball Dia. | Nut Length L | Circuit Number N | Ca | Coa | Suitable Use |
|---|---|---|---|---|---|---|---|
| SFU1605-3 | 5 | 3.175 | 43 | 3 | 765 | 1240 | Compact structure and standard load use |
| SFU1605-4 | 5 | 3.175 | 50 | 4 | 780 | 1790 | Better load support and stable movement |
DFU1605 Double Ball Screw Nut Dimensions
Double nut structure for better backlash control and more stable matched assembly.
| Model Type | Reference Data Dimensions of Ball Screw and Nut | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | I | Da | D | A | B | L | W | X | H | Q | N | Ca | Coa | K | |
| DFU1604-4 | - | 4 | 2.381 | 28 | 48 | 10 | 80 | 38 | 5.5 | 40 | M6 | 4 | 629 | 1270 | 42 |
| DFU1605-3 | - | 5 | 3.175 | 28 | 48 | 10 | 86 | 38 | 5.5 | 40 | M6 | 3 | 765 | 1240 | 30 |
| DFU1605-4 | 16 | 5 | 3.175 | 28 | 48 | 10 | 100 | 38 | 5.5 | 40 | M6 | 4 | 780 | 1790 | 43 |
SCM1605 Cylindrical Ball Screw Nut Dimensions
Cylindrical type nut for different machine installation structures.
| Model | Specifications | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | I | Da | D | A | B | L | Q | L1 | N | Ca | Coa | K | |
| SCM1604-3 | 16 | 4 | 2.381 | 29 | M22X1.5P | 8 | 32 | - | - | 3 | 435 | 920 | 16 |
| SCM1605-3 | 16 | 5 | 3.175 | 28/32 | M27X1.5P | 16 | 50 | M6 | 6.5 | 4 | 765 | 1240 | 17 |
| SCM1605-4 | 16 | 5 | 3.175 | 28/32 | M30X1.5P | 16 | 56 | M6 | 6.5 | 4 | 980 | 1650 | 23 |
How to Choose the Right 1605 Ball Screw Nut
For replacement orders, the model name alone is not enough.
Confirm Diameter and Lead
1605 means 16mm screw diameter and 5mm lead. If the existing screw is not 16mm diameter or 5mm lead, the nut cannot be selected only by appearance.
Confirm Nut Type
SFU, DFU, SCM, SFA and SFNU have different nut bodies and installation dimensions. Even with the same 1605 size, they may not be directly interchangeable.
Check Circuit Number
SFU1605-3 and SFU1605-4 have different circuit numbers and nut lengths. This may affect load support, running stability and installation space.
Check Screw Shaft Wear
If the screw raceway is already worn, replacing only the nut may not fully solve backlash or rough movement. A matched ball screw and nut assembly may be more reliable.
Replacement reminder: Do not remove the ball screw nut directly from the screw without a transfer sleeve. The internal balls may fall out, making the nut difficult to reinstall correctly.
Applications of 1605 Ball Screw Nut
Commonly used in compact and medium-size linear motion systems.
- CNC routers and engraving machines
- 3D printers and Z-axis lifting structures
- Small milling machines and desktop CNC equipment
- Automation sliding tables and compact linear modules
- Packaging equipment and light-duty transmission systems
- Testing equipment and measuring devices
- Replacement for existing SFU1605 ball screw assemblies
- Distributor stock and regular spare parts supply
Available Supply Options from DLY
Flexible supply for replacement, assembly and wholesale purchasing.
1605 Ball Screw Nut Only
Suitable for replacement, repair and spare parts stocking. Please provide the original nut photo, model or drawing for confirmation.
SFU1605 Ball Screw with Nut
Suitable for new machine assembly or when both the screw shaft and nut need to be replaced together.
Machined Ball Screw Assembly
DLY can provide cutting, end machining and matched assembly according to the buyer's drawing.
Bulk Supply for Distributors
Regular models can be supplied for distributor inventory, machine builders and repeated purchasing projects.
FAQ About 1605 Ball Screw Nut
Common questions from buyers when selecting or replacing a 1605 ball screw nut.
Q1: What does 1605 mean in a ball screw nut?
1605 means the ball screw has a 16mm nominal diameter and 5mm lead. But nut type, flange size, circuit number and matching condition still need to be confirmed.
Q2: Can I buy only the 1605 ball screw nut?
Yes. DLY can supply the 1605 ball screw nut separately. For replacement use, please provide the screw model, original nut photo or drawing.
Q3: Can a 1605 ball screw nut fit all SFU1605 screws?
Not always. Different manufacturers may have differences in ball size, nut dimensions, clearance and matching condition. Confirmation is recommended before ordering.
Q4: What is the difference between SFU1605-3 and SFU1605-4?
The main difference is the circuit number and nut length. SFU1605-4 has a longer nut body and higher static load rating in the reference data.
Q5: Can DLY supply the full SFU1605 ball screw assembly?
Yes. DLY can provide ball screw shaft, matched nut, cutting, end machining and assembly service according to your drawing or machine requirement.
Send Your 1605 Ball Screw Nut Inquiry
If you are not sure which 1605 nut type is suitable, send us the model, photo, drawing, screw length and quantity. We will help check the structure and recommend a suitable option.
Email: export@dlybearing.com
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