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HS/SF Series Metric Solid Linear Shaft

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  • HS/SF Series Metric Solid Linear Shaft
HS/SF Series Metric Solid Linear Shaft

HS/SF Series Metric Solid Linear Shaft

The HS/SF series are solid linear shafts covering metric standard sizes. The HS series features high-frequency hardened standard shafts, offering ultimate wear resistance; the SF series features unhardened soft shafts, providing good cost-effectiveness and ease of processing. Both series have a hard chrome plating for corrosion resistance, and custom outer diameter tolerances are available to meet different levels of needs, from heavy-duty high-speed applications to general guidance.

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Technology

Core Features and Advantages Comparison

Property Dimensions HS Series (High-Frequency Induction Hardened Standard Shafts) SF Series (Unquenched Soft Shafts) Key Selection Guidelines
Core Positioning A solution for shafts offering exceptional service life, high wear resistance and impact resistance. Economical soft shafts offering excellent value for money and ease of machining. Choose the HS series for heavy loads, high speeds and high-frequency operation; choose the SF series for general loads, cost-sensitive applications or where secondary machining is required.
Heat Treatment Process High-frequency induction hardening. Surface hardening (depth 1–3 mm) to a hardness of HRC 58–62, whilst maintaining toughness in the core. These shafts have not undergone quenching treatment and retain the material’s original hardness (which is typically low). The HS series features an extremely hard, wear-resistant surface, whilst the SF series has a lower hardness but is easier to machine.
Materials and Properties GCr15: Bearing steel, excellent hardenability, top-tier wear resistance and core strength.
S45C: Carbon steel, economical and wear-resistant.		 S45C: Lower hardness, but excellent machinability; easy to cut and subject to secondary machining. The HS series’ GCr15 steel is designed for extreme operating conditions; the SF series is suitable for standard applications and is easy to modify.
Wear Resistance and Service Life Extremely high. Hard chrome plating + hardened layer, wear life far exceeds the SF series, particularly suited to high PV value operating conditions. Average. Relies on the chrome plating for basic wear resistance and rust protection. In environments with high dust levels, high speeds and limited access for maintenance, the HS series significantly reduces downtime costs.
Machinability Poor. The hardened surface can only be machined by grinding; drilling, threading, etc., are extremely difficult. Good. Easy to cut, turn, drill, tap and perform other secondary machining operations. If on-site cutting to length or machining of end profiles is required, the SF series must be selected.
Outer Diameter Tolerance Can be precision-ground to specification, offering tolerance grades such as h5, h6, g6 and f7, ensuring a precise fit with the bearing. Can be precision ground or cold drawn on request, offering similar tolerance grades. Both series can achieve high-precision fits to meet various assembly requirements.
Straightness Excellent. Following precision straightening and grinding, straightness control is outstanding. Good. Straightened to meet industrial standards for straightness. The HS series is typically used in applications requiring higher precision guidance.

Technical Details: Process, Material Selection, and Selection Guide
1. HS Series Process Route:
GCr15/S45C bar stock → Rough machining → High-frequency hardening → Straightening → Precision grinding (to tolerance) → Hard chrome plating → Fine polishing/straightening.
Advantages: Hard surface, tough core, strong resistance to pitting and fatigue spalling.

2. SF Series Process Route:
S45C bar stock → Straightening → Precision grinding or cold drawing (to tolerance) → Hard chrome plating.
Advantages: Low cost, fast delivery, easy to cut and end-process according to on-site needs.

3. Three-Step Selection Decision:
1. Application determines series: Analyze whether the equipment is high-speed, heavy-duty, continuously operating, or in a harsh environment. If so, prioritize HS; if it's for general load, low speed, or requires frequent modifications, or is cost-sensitive, choose SF.
2. Load determines material (HS only): If choosing the HS series, select GCr15 for high impact loads and extreme reliability requirements; select S45C for optimal cost-effectiveness and wear resistance.
3. Fit determines tolerance: Specify the outer diameter tolerance level based on the fit characteristics with the linear bearing (clearance, transition, interference).

Applications
HS Series Hard Shaft Applications:
High-speed automation: High-speed guide shafts for laser cutting machines, CNC machine tool magazines, and industrial robot joints.
Heavy-duty equipment: Support and guide shafts for injection molding machine manipulators and stamping automation lines.
Harsh environments: Guide shafts in dusty and humid environments in ceramic, woodworking, and food machinery. SF Series Flexible Shaft Applications:
General Automation: General support and structural shafts for conveyor lines, assembly machines, and packaging machines.
Tooling and Maintenance: Positioning shafts, mandrels, and equipment repair and replacement parts requiring on-site cutting and drilling.
Lightweight Equipment: Various types of equipment where cost control is a priority.

HS/SF series metric solid linear shafts are distinguished by their clear heat treatment processes, providing users with a clear selection path.
Choosing the HS high-frequency hardened standard shaft means you prioritize the long-term reliability and ultra-low maintenance costs of your equipment. This is a valuable investment aimed at reducing the total cost of ownership for core motion components.
Choosing the SF unhardened flexible shaft means you have made an economical, flexible, and easily adaptable choice for on-site applications while meeting general performance requirements. This is ideal for situations with limited budgets or requiring high levels of customization.
Our value lies not only in providing products but also in helping you make precise and economical choices based on your actual working conditions.

Parameters

Model No. Outer Diameter
(mm)		 Diameter Tolerance Depth of Effevtive
Hardness Layer		 Weight
Kg/m
g6 h6
HS/SF3 3 -0.002 -0.008 0 -0.006 0.4~0.7 0.05
HS/SF4 4  -0.004 -0.012 0 -0.006 0.4~0.7 0.09 
HS/SF5 5  -0.004 -0.012 0 -0.006 0.4~0.7 0.15 
HS/SF6 6  -0.004 -0.012 0 -0.008 0.4~1.0 0.22 
HS/SF8 8  -0.005 -0.014 0 -0.009 0.4~1.0 0.4 
HS/SF10 10  -0.005 -0.014 0 -0.009 0.6~1.5 0.62 
HS/SF11 11  -0.006 -0.017 0 -0.011 0.6~1.5 0.74 
HS/SF12 12  -0.006 -0.017 0 -0.011 0.6~1.5 0.89 
HS/SF13 13  -0.006 -0.017 0 -0.011 0.6~1.5 1.04 
HS/SF14 14  -0.006 -0.017 0 -0.011 0.6~1.5 1.20 
HS/SF15 15  -0.006 -0.017 0 -0.011 0.6~1.5 1.38 
HS/SF16 16  -0.006 -0.017 0 -0.011 0.8~2.0 1.58 
HS/SF17 17  -0.006 -0.017 0 -0.011 0.8~2.0 1.78 
HS/SF18 18  -0.007 -0.020 0 -0.013 0.8~2.0 1.99 
HS/SF19 19  -0.007 -0.020 0 -0.013 0.8~2.0 2.22 
HS/SF20 20  -0.007 -0.020 0 -0.013 0.8~2.0 2.47 
HS/SF22 22  -0.007 -0.020 0 -0.013 0.8~2.0 2.98 
HS/SF25 25  -0.007 -0.020 0 -0.013 0.8~2.0 3.85 
HS/SF28 28  -0.007 -0.020 0 -0.013 0.8~2.0 4.83 
HS/SF30 30  -0.007 -0.020 0 -0.013 0.8~3.0 5.55 
HS/SF32 32  -0.009 -0.025 0 -0.016 0.8~3.0 6.31 
HS/SF35 35  -0.009 -0.025 0 -0.016 0.8~3.0 7.55 
HS/SF38 38  -0.009 -0.025 0 -0.016 0.8~3.0 8.90 
HS/SF40 40  -0.009 -0.025 0 -0.016 0.8~3.0 9.87 
HS/SF45 45  -0.009 -0.025 0 -0.016 0.8~3.0 12.49 
HS/SF50 50  -0.009 -0.025 0 -0.019 0.8~3.0 15.4 
HS/SF55 55  -0.009 -0.025 0 -0.019 1.5~3.0 18.66 
HS/SF60 60  -0.010 -0.029 0 -0.019 1.5~3.0 22.21 
HS/SF70 70  -0.010 -0.029 0 -0.019 1.5~3.0 30.23 
HS/SF80 80  -0.012 -0.034 0 -0.022 1.5~3.0 39.48 
HS/SF90 90  -0.012 -0.034 0 -0.022 1.5~3.0 49.97 
HS/SF100 100  -0.012 -0.034 0 -0.022 2.0~3.0 61.70 
HS/SF110 110  -0.012 -0.034 0 -0.022 2.0~3.0 76.02 
HS/SF120 120  -0.014 -0.039 0 -0.022 2.0~3.0 88.84 
HS/SF150 150  -0.014 -0.039 0 -0.025 2.0~3.0 138.82 

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