Vitronics Soltec ITW MR933 MR1243 Width Adjustable Bracket
Vitronics Soltec (ITW) MR933 / MR1243 Width Adjustment Bracket (Guide Rail Support / Width Adjustment Bracket)
Core Positioning and Applicable Models
Full Name: Automatic/Manual Width Adjustment Bracket (Conveyor Width Adjustment Bracket / Rail Support Bracket), used for adjusting the width of the left and right guide rails in a reflow oven, providing horizontal support for the guide rails, and synchronous transmission. Compatible with the entire MR reflow oven series, including MR933, MR1243, and MR1030.
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Vitronics Soltec ITW MR933 MR1243 Width Adjustable Bracket
Structure: Consists of four main components: a fixed side bracket (left/main rail), a sliding side bracket (right/moving rail), a lead screw/synchronous belt/bearing housing, and a flange base. It supports the guide rails, carries the PCB, and ensures the parallelism of the width adjustment.
Original Core Part Numbers (7-C Series, Most Commonly Used)
Sliding Side Adjustable Width Bracket Assembly (Moving Rail)
7-C300121 / C300121: MR933/MR1243 Standard Width Adjustable Sliding Bracket (Including Screw Seat, Guide Rail Slider, Support Base)
7-C300122 / C300122: Extended Version / Wide Version (450mm+) Sliding Bracket
Fixed Side Bracket Assembly (Fixed Rail)
7-C300120 / C300120: Fixed Guide Rail Support Base, Mounting Flange
Screw / Transmission / Bearing Accessories
7-C300125 / C300125: Width Adjustable Ball Screw (Left and Right Turn, Compatible with MR933/MR1243)
7-C300126 / C300126: Screw Support Bearing Seat, Locking Nut
7-C300128 / C300128: Synchronous Belt Pulley / Synchronous Belt (Width Adjustable Transmission)
Key Specifications (MR933/MR1243 Universal)
Material: 6061 Aluminum Alloy + Stainless Steel Fasteners, High Temperature Resistance, Deformation Resistance, Corrosion Resistance
Adjustable Stroke: 50–450mm (Standard PCB Width)
Installation Center Distance: Furnace Body Side Plate Opening Spacing 320mm / 380mm (MR933/MR1243 Standard)
Screw Specification: Tr16×4 Left/Right Turning Ball Screw, Length Adapted to Furnace Length (MR933 approx. 3.3m, MR1243 approx. 4.2m)
Accuracy: Width Adjustment Parallelism ≤ 0.1mm/m, Ensuring Guide Rail Synchronization and No Board Jamming
Replacement and Matching Points (Must Verify)
Confirm Model: MR933 (Zone 9) / MR1243 (Zone 12), Different Bracket Length and Total Screw Length
Distinguish Between Fixed Sides / Sliding side, non-interchangeable. Verify the furnace body side plate mounting hole positions, center distance, lead screw length, and guide rail cross-section (20×40mm aluminum profile). Prioritize assemblies with linear guide rails/slider and double bearing support for smoother width adjustment and longer lifespan.
Common alternative models: C300119, C300123, C300124 (different length/width versions within the same series). Domestic universal: MR series width adjustment bracket (compatible with Vitronics MR933/MR1243).