8-45 Series Aluminum Frames 4545 & 4590: The Engineer's Guide to 45mm T-Slot Profiles for Industrial Automation in India
Publish Date: 4 May 2026
MISUMI 8-45 Series Aluminum Frames 4545 & 4590 — Slot Width 10 mm | View on MISUMI India
There's a moment in every machine design project where the frame decision has to be made. Weld it from steel? That's weeks of fabrication time, a permanent structure that can't easily be changed, and a supplier relationship that rarely moves fast. Or build it modular — with aluminum extrusion profiles that bolt together, reconfigure without a grinder, and arrive in days.
For most Indian automation engineers, machine builders, and production line designers working with medium-to-heavy duty equipment, that modular choice increasingly points to one profile family: the 8-45 Series Aluminum Frames — the 4545 (45×45 mm) and 4590 (45×90 mm) configurations. With a 10 mm slot width designed for M8 bolts, these are the step up from the lighter 6 Series — bringing greater rigidity, higher load capacity, and a wider accessory ecosystem suited to demanding industrial applications.
This guide covers everything you need to know: technical specifications, structural differences between the 4545 and 4590, application guidance, accessory selection, and why MISUMI India's 8-45 Series Aluminum Frames are a go-to choice for Indian engineers building automation lines, conveyor structures, inspection stations, and industrial enclosures.
What Are 8-45 Series Aluminum Frames? Understanding the 4545 and 4590
MISUMI's 8-45 Series Aluminum Frames are structural aluminum extrusion profiles in the 45 mm dimension family, featuring a 10 mm slot width. The series name "8-45" refers to the series designation (8) and the key dimension (45 mm).
The two primary cross-section configurations in this family are:
- 4545 (45×45 mm Square) — A square-section profile with equal width and height, offering uniform rigidity in all lateral directions.
- 4590 (45×90 mm Rectangular) — A rectangular profile with double the height, providing significantly greater bending resistance in the longer dimension, making it ideal for beams and horizontal spans.
Both profiles use a 10 mm T-slot system compatible with M8 fasteners. This is the defining structural differentiator compared to the 8 mm-slot 6 Series. The wider slot and M8 bolt compatibility deliver higher joint strength, making the 8-45 Series the preferred choice when frame loads increase or span lengths grow.
Key Technical Specifications — 8-45 Series (4545 & 4590)
| Specification | 4545 (45×45 mm) | 4590 (45×90 mm) |
|---|---|---|
| Series | 8-45 Series | |
| Slot Width | 10 mm | |
| Compatible Bolt | M8 | |
| Cross-Section | 45×45 mm (Square) | 45×90 mm (Rectangular) |
| Number of Slots (Standard) | 4 Side Slots (Standard) / 3-Side Variants Available | 1 Slot × 2 Slots (Standard); Milled Surface Variants Available |
| Material | A6N01SS-T5 Aluminum Alloy | |
| Surface Treatment | Clear Anodized (Standard); Black Anodized Available on Selected Variants | |
| Configurable Length | 50 mm to 4000 mm in 0.5 mm Increments (Standard); Fixed 4000 mm Lengths Available | |
| Economy Series (LCF) | LCF10-4545 — 45×45 mm, 1 Slot/Side, 10 mm Slot Width | LCF10-4590 — 45×90 mm, 10 mm Slot Width |
| Weight (Economy Series) | ~1.6 kg/m | Higher — Refer to Product Page |
| Total Items in Range | 271 Items Across Standard, Lightweight, Economy, and Milled Surface Variants | |
Important Note: The 8-45 Series accessories are not interchangeable with 6 Series (8 mm slot) accessories. Always select brackets, nuts, and connectors specifically designed for 10 mm slot width. Economy series accessories begin with "L" and are specific to economy profile variants.
Explore the 4545 & 4590 Product Range
Browse and configure MISUMI India's 8-45 Series Aluminum Frames — specify your exact length, slot configuration, and surface treatment directly online with free 3D CAD download.
4545 Aluminum Frame (45×45 mm Square) — When to Use It
The 4545 Aluminum Frame is the standard square-section profile in the 8-45 family. Its 45×45 mm cross-section provides equal rigidity on all four sides — making it the versatile choice for vertical columns, three-dimensional frame assemblies, and any application where load direction varies or is not predetermined at the design stage.
Structural Properties of the 4545
- Uniform cross-section: Equal moment of inertia in both axes — no preferred bending direction. Ideal for vertical columns and corner frames.
- 4 side slots (standard variant): Maximum accessory mounting flexibility — brackets, sensors, panels, and cable management can attach on any face.
- 3 side slot variant (HFSLF8-4545): One face is closed for aesthetic or structural reasons, with a solid face for direct mounting without slot inserts.
- Lightweight variant (HFSL): Hollow core reduces weight to approximately 5.5 units lighter — ideal where total machine weight is a constraint.
- Centre hole diameter: 10.2 mm (economy series LCF10-4545) — accepts standard rods and fixturing components.
Typical Applications of 4545 Frames
- Vertical column members in automation cell frameworks
- Three-dimensional machine base structures and equipment cabinets
- Corner posts in safety guarding and machine enclosures
- Small hood and cabinet structures (economy LCF series)
- Display bar structures, test fixtures, and sensor mounting frames
- Conveyor side-frame posts and upright supports
Economy Series Note — LCF10-4545
The economy series 4545 (part number LCF10-4545-4000) offers a cost-optimised option with the same 10 mm slot width and 45×45 mm cross-section. Lengths from 50 to 4000 mm can be cut free of charge in 1 mm increments. As an economy product, minor surface scars may be present. For applications with high surface finish requirements, the standard series is recommended.View LCF10-4545 on MISUMI India →
4590 Aluminum Frame (45×90 mm Rectangular) — When to Use It
The 4590 Aluminum Frame is a rectangular profile with a 2:1 aspect ratio — 45 mm in one direction and 90 mm in the other. This geometry fundamentally changes the structural behaviour: the moment of inertia in the 90 mm direction is approximately 8× greater than in the 45 mm direction, making the 4590 significantly stiffer against bending loads applied perpendicular to the long face.
In practice, this means the 4590 is the right profile when deflection matters — when a beam spans a meaningful distance and carries a load, or when a horizontal member needs to maintain dimensional accuracy under working conditions.
Structural Properties of the 4590
- Rectangular cross-section (45×90 mm): Much higher bending resistance in the 90 mm direction — the profile resists deflection along its longer axis.
- 1 slot × 2 slots configuration: Standard variant has one slot on each 45 mm face and two slots on each 90 mm face, allowing mounting on all sides.
- Milled surface (parallel surfacing) variant: Provides a precision flat reference face for applications requiring accurate part location or direct mounting without shimming.
- Length range: 100 to 3000 mm (milled surface variant); 50 to 4000 mm (standard variants).
- Compatible with M8 fasteners: 10 mm slot width throughout.
Typical Applications of 4590 Frames
- Horizontal beam members spanning between vertical supports — the primary use case
- Conveyor side rails and longitudinal frame beams on belt conveyor structures
- Gantry cross-members carrying robot arms, cameras, or inspection heads
- Equipment base frames with long spans between leg supports
- Machine table structures where horizontal rigidity is the primary structural requirement
- Reinforcement members in tall frame assemblies to prevent lateral sway
Application Example — Conveyor Frame
A 2-metre belt conveyor for an electronics assembly line uses 4590 frames as the main longitudinal beams (horizontal, spanning the full conveyor length) and 4545 frames as the upright legs and cross-supports. The 4590's higher bending resistance in the 90 mm direction prevents sagging under the belt load and workpiece weight, while the 4545 legs provide uniform rigidity against lateral and corner forces. Browse Both Profiles on MISUMI India →
4545 vs 4590 — Choosing the Right Profile for Your Application
| Criteria | 4545 (45×45 mm Square) | 4590 (45×90 mm Rectangular) |
|---|---|---|
| Cross-section Shape | Square — equal in both directions | Rectangular — stiffer in 90 mm direction |
| Bending Resistance | Equal in both axes — versatile | Much higher in 90 mm axis — ideal for beams |
| Best Structural Role | Vertical columns, corner posts, 3D frames | Horizontal beams, long spans, load-bearing rails |
| Slot Configuration | 4-side (standard) or 3-side variants | 1-slot × 2-slot (standard); milled surface available |
| Milled Surface Option | Not standard | Available — for precision reference face applications |
| Economy Series | LCF10-4545 — widely available, cut to length | LCF10-4590 — available |
| Conveyor Longitudinal Beam | Acceptable for short spans | Preferred — higher bending resistance reduces sag |
| Machine Enclosure Post | Preferred — uniform rigidity on all sides | Less common for posts |
| Weight per Metre | Lower (~1.6 kg/m economy) | Higher — proportional to cross-section |
| Most Projects Use... | Both — 4545 for columns/posts, 4590 for beams and long-span members | |
How to Select the Right 4545 or 4590 Profile — A Practical Guide
Step 1: Determine the Structural Role
Is the member a vertical column (carrying compressive loads and requiring rigidity in multiple directions)? Choose the 4545 profile.
Is it a horizontal beam (spanning a distance and resisting bending under load)? Choose the 4590 profile, oriented with the 90 mm dimension vertical.
Step 2: Calculate the Span and Load
For beams, a simplified deflection check applies: the longer the unsupported span and the heavier the load, the more important it becomes to use the 4590 rather than the 4545.
For spans over 1 metre carrying meaningful loads, the 4590 should generally be the default choice.
Step 3: Decide on Surface Finish
- Standard applications: Clear anodized finish
- Cleanroom aesthetics, reflectance control, or product differentiation: Black anodized finish (subject to availability)
- Precision reference face requirements: 4590 profile with parallel milled surface
Step 4: Specify the Length
MISUMI India cuts aluminum frames to length as part of the ordering process. Specify the required length in 0.5 mm increments between 50 mm and 4000 mm for standard variants.
Fixed-length 4000 mm products are also available (part numbers beginning with "K"). Note that fixed-length products include an effective length allowance, meaning the actual piece will be slightly longer to accommodate processing and gripping during manufacture.
Step 5: Add Tapped Holes or Processing Options
If your design requires additional tapped holes for direct mounting of motors, sensors, brackets, or custom components, these can be specified as processing options when ordering.
Processing is performed within defined machining zones shown in MISUMI India's technical drawings for each profile.
💡 Pro Tip — Use MISUMI's Frames Design Software
MISUMI India provides a dedicated Frames Design Software that allows engineers to create aluminum frame assemblies in 3D, generate cut lists automatically, and produce part numbers directly from the design.
Why Specify Aluminum Frames from MISUMI India
The right aluminum frame profile is only half the equation. Getting it cut to length, delivered on time, and supported with the correct accessories is equally important. MISUMI India's aluminum frame range addresses these requirements directly.
- Cut to length in 0.5 mm increments — No overstock and no material waste. Specify exactly what your design requires.
- Free 3D CAD data — Download the exact geometry of your configured profile and integrate it directly into machine designs.
- 271 items in the 8-45 Series range — Including square, rectangular, lightweight, 3-side slot, milled surface, and economy variants.
- No minimum order quantity — Suitable for both prototype development and large production rollouts.
- Compatible accessories in one catalogue — Brackets, insertion nuts, frame caps, casters, levelling feet, and panel holders available from a single source.
- Free delivery on qualifying orders — Available across major industrial regions in India.
- Assembly service available — for complex frame assemblies, MISUMI India's frame assembly service delivers pre-built sub-assemblies, reducing on-site build time.
Final Thoughts
The 8-45 Series Aluminum Frames — the 4545 and 4590 profiles — occupy an important position in the MISUMI India range. They are stronger and more rigid than the compact 6 Series, while maintaining a 45 mm dimension that fits naturally into medium-duty machine frames, conveyor structures, and automation enclosures without the larger footprint associated with 60×60 mm or 100×100 mm sections.
Use the 4545 where your structure requires uniform, multi-directional rigidity — such as posts, columns, and three-dimensional frames. Use the 4590 where a beam must span a distance under load without excessive deflection. In most real-world machine frame projects, both profiles are used together to achieve the best balance of structural performance and cost efficiency.
With A6N01SS-T5 aluminum alloy construction, 10 mm T-slots compatible with M8 fasteners, free cut-to-length service, free 3D CAD downloads, and a complete ecosystem of compatible accessories, MISUMI India's 8-45 Series Aluminum Frames provide machine builders and automation engineers with a practical solution for creating reliable, reconfigurable, and professional-grade industrial structures — while reducing fabrication time and complexity compared to welded alternatives. Explore the Complete Aluminum Frames 4545 & 4590 Range on MISUMI India →
Configure your profile, download the CAD data, and order online to accelerate your next automation, machinery, or conveyor project.
