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We have *professional and experienced engineer team *Advanced production and inspection equipment*Powerful quality control system *Professional customer service Based on our professional service,high
2 Years
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| Brand Name : | Qingdao Sande Tech Co.,Ltd |
| Model Number : | OEM |
| Certification : | ISO, DIN, AISI, ASTM, BS, JIS, etc. |
| Price : | $0.5-2 |
| Payment Terms : | D/A,D/P,T/T |
| Supply Ability : | 10000PCS/month |
| Delivery Time : | 30 days |
The Forged Slotted Guide Post is a high-precision CNC machined positioning shaft designed for linear guidance, tool alignment, and die/mold set positioning. Manufactured from forged alloy steel, the integrated slot feature provides anti-rotation functionality while maintaining precise linear motion. Precision CNC turning, milling, and grinding operations ensure tight dimensional tolerances and superior surface finishes, making this guide post ideal for stamping dies, injection molds, automated machinery, and precision positioning systems.
| Parameter | Value / Range |
|---|---|
| Material | Alloy steel (42CrMo4, 4140, 4340, 40Cr, 20MnCr5, or custom) |
| Forging Process | Closed-die or open-die forging |
| Shaft Diameter Range | 20 mm – 200 mm (0.75" – 8") |
| Overall Length Range | 100 mm – 1500 mm (4" – 60") |
| Slot Width Range | 6 mm – 30 mm (0.25" – 1.2") |
| Slot Length | Full length or partial (customer specified) |
| Diameter Tolerance (critical) | ISO IT6 (±0.005 mm – 0.013 mm) |
| Concentricity (OD to axis) | ≤0.01 mm |
| Slot Position Tolerance | ±0.05 mm relative to axis |
| Surface Finish (ground) | Ra 0.4 – 0.8 μm |
| Surface Finish (turned) | Ra 1.6 – 3.2 μm |
| Hardness (through-hardened) | 28–36 HRC |
| Hardness (case-hardened) | 58–62 HRC (case depth 0.8–1.5 mm) |
| Straightness | ≤0.05 mm per 500 mm length |
| Non-Destructive Testing | UT, MT (optional) |
| Slot Type | Description | Typical Application |
|---|---|---|
| Full-length parallel slot | Continuous slot from end to end | Long-stroke linear guidance |
| Partial-length slot | Slot machined only on specific section | Short anti-rotation zone with smooth journal areas |
| Double opposed slots | Two slots at 180° | Higher torque transmission |
| Keyway-style slot | Closed-end slot (blind) | End-stop positioning |
| D-section (flattened) | Flat milled along partial length | Simple anti-rotation, lower cost |
| Industry | Application |
|---|---|
| Stamping Dies | Guide posts for die sets (press tools) |
| Injection Molds | Ejector guide pins and mold alignment posts |
| Automation Equipment | Linear actuator guide shafts with anti-rotation |
| Hydraulic Cylinders | Piston rods with anti-rotation slot for position feedback |
| Packaging Machinery | Reciprocating guide shafts for sealing/cutting heads |
| Machine Tools | Quill guide posts for drilling/milling spindles |
| Material Handling | Lift table guide posts with orientation control |
| Feature | Benefit |
|---|---|
| Forged grain flow | Continuous grain lines follow shaft contour → higher fatigue resistance, no hidden voids |
| Integral slot | Eliminates pinned or welded anti-rotation keys → no loosening over time |
| Pre-ground slot faces | Smooth sliding surface reduces wear on mating bushings or keys |
| Stepped diameters | Single-piece design replaces multi-component assemblies → lower cost, better concentricity |
| Heat treated | Wear-resistant surface with tough core → handles shock loads and repetitive sliding |
| Feature | Forged Slotted Guide Post | Bar Stock + Milled Slot | Cast Guide Post |
|---|---|---|---|
| Strength | ★★★★★ (Best) | ★★★☆☆ (Good) | ★★☆☆☆ (Poor) |
| Fatigue life | ★★★★★ | ★★★☆☆ | ★★☆☆☆ |
| Material efficiency | ★★★★☆ (Near-net shape) | ★★☆☆☆ (Wasteful) | ★★★★☆ |
| Internal defects | None (forged) | None (wrought) | Possible porosity |
| Lead time (custom) | 20–30 days | 10–15 days | 25–35 days |
| Cost (medium volume) | ★★★☆☆ | ★★★★☆ (Lower) | ★★★☆☆ |
| Best application | High-cycle, heavy-load | Light-duty, prototype | Low-stress, static |
To request a quotation, please provide the following:
| Criterion | Our Advantage |
|---|---|
| Experience | 15+ years in precision CNC machining of forged components |
| Quality | ISO 9001 certified with full traceability |
| Flexibility | Accept small prototypes and large production runs |
| Technical support | Engineering review of every drawing before production |
Q1: What is a forged slotted guide post?
A: It is a precision-machined cylindrical shaft with an integral
longitudinal slot, produced from a closed-die forging. The slot
provides anti-rotation guidance while allowing linear movement. The
forging process creates a continuous grain flow, delivering
superior strength and fatigue resistance compared to
machined-from-bar or cast alternatives.
Q2: What is the purpose of the slot?
A: The slot serves two primary functions:
Q3: How is a slotted guide post different from a standard linear
shaft?
A: A standard linear shaft has a smooth cylindrical surface and
relies on external features (keys, flats, or splines) for
orientation. A slotted guide post integrates the anti-rotation
feature directly into the shaft, reducing component count and
assembly complexity while improving concentricity.
Q4: Why choose forged instead of machined from bar stock?
A: Forging offers three key advantages:
Q5: What materials are available for slotted guide posts?
A: Common materials include:
| Material Grade | Equivalent | Typical Hardness | Application |
|---|---|---|---|
| 42CrMo4 | AISI 4140 | 28–36 HRC (through) | General heavy-duty |
| 20MnCr5 | AISI 5120 | 58–62 HRC (case) | Wear-resistant surface |
| 40Cr | AISI 5140 | 28–36 HRC | Cost-effective general use |
| 34CrNiMo6 | AISI 4340 | 32–40 HRC | High-strength, impact loads |
| 9SMnPb28 | 12L14 | As-rolled (low hardness) | Light-duty, low-cost |
Stainless steel (17-4PH, 304, 316) and tool steel (D2, O1) available upon request.
Q6: What heat treatment options do you offer?
A:
| Treatment | Process | Hardness | Best For |
|---|---|---|---|
| Through-hardened | Quench + temper | 28–36 HRC | Uniform strength, general guide posts |
| Case-hardened (carburized) | Carburize + quench + temper | 58–62 HRC (case depth 0.8–1.5 mm) | High-wear, sliding applications |
| Induction hardened | Localized induction + quench | 55–60 HRC | Bearing journals only |
| Normalized | Heat + air cool | 180–240 HB | Stress relief, improved machinability |
Q7: Can you provide material certifications?
A: Yes. We provide EN 10204 Type 3.1 mill test certificates (MTC)
for all forged blanks. Third-party inspection (SGS, BV, TÜV) is
available at additional cost.
| Slot Type | Description | Best Application |
|---|---|---|
| Full-length parallel | Continuous slot from end to end | Long-stroke linear guidance |
| Partial-length | Slot on specific section only | Short anti-rotation zone with smooth journal |
| Double opposed (180°) | Two slots opposite each other | Higher torque transmission |
| Blind slot | Closed end (does not reach shaft end) | End-stop positioning |
| D-section (flattened) | Flat milled along partial length | Simple, lower-cost anti-rotation |
| T-slot | Inverted T profile | Captive key applications |
Q9: What are the typical slot dimensions?
A: Standard ranges:
Q10: What tolerances can you hold on the slot?
| Slot Feature | Tolerance |
|---|---|
| Slot width | ±0.05 mm |
| Slot depth | ±0.10 mm |
| Slot position relative to axis | ±0.05 mm |
| Slot parallelism to axis | ≤0.05 mm per 500 mm |
| Slot symmetry (double slots) | ±0.10 mm |
Q11: What dimensional tolerances can you achieve?
| Feature | Tolerance |
|---|---|
| Critical diameters (bearing/seal journals) | ISO IT6 (±0.005 – 0.013 mm) |
| Non-critical diameters | ISO IT8–IT9 |
| Overall length | ±0.2 mm (standard), ±0.05 mm (precision) |
| Concentricity (OD to axis) | ≤0.01 mm |
| Straightness | ≤0.05 mm per 500 mm |
| Perpendicularity (shoulder to axis) | ≤0.02 mm |
Q12: What surface finishes are available?
| Finish | Ra Range | Method | Application |
|---|---|---|---|
| As-turned | 1.6 – 3.2 μm | CNC turning | Non-bearing surfaces |
| Ground | 0.4 – 0.8 μm | Cylindrical grinding | Guide surfaces, bushings |
| Polished | 0.1 – 0.2 μm | Superfinishing | High-speed, low-friction |
| Slot faces (milled) | 1.6 – 3.2 μm | CNC milling | Standard sliding |
Q13: How do you ensure straightness?
A: Straightness is controlled through:
Q14: Can you machine additional features like cross-holes, threads,
or snap ring grooves?
A: Yes. Our CNC machining centers can add:
Q15: What non-destructive testing (NDT) do you offer?
| Test | Standard | Detects | Recommendation |
|---|---|---|---|
| Ultrasonic Testing (UT) | ISO 10893-8 / ASTM A388 | Internal voids, inclusions | Forged blanks, high-stress parts |
| Magnetic Particle (MT) | ASTM E709 | Surface/subsurface cracks | After heat treatment |
| Dye Penetrant (PT) | ASTM E1417 | Surface cracks (non-magnetic materials) | Stainless steel parts |
Q16: How do you inspect the slot position?
A: We use:
Q17: Are you certified?
A: Our CNC machining facility is ISO 9001:2015 certified. Forging
partners may hold additional certifications including IATF 16949
(automotive) and AS9100D (aerospace) upon request.
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