Precut Alignment Shims
Alignment shims are precision tools used in turbomachinery to ensure accurate shaft alignment between rotating components like turbines, compressors, and pumps. They help prevent vibration, wear, and energy loss by compensating for baseplate irregularities and thermal expansion.
⚙️ Why Alignment Shims Matter in Turbomachinery
Turbomachines operate at high speeds and tight tolerances. Even a slight misalignment between the driver (e.g., motor) and driven equipment (e.g., turbine or pump) can cause:
Excessive vibration
Bearing wear and seal damage
Reduced energy efficiency
Premature failure of couplings and shafts
Alignment shims are thin, precisely machined plates (often stainless steel or brass) inserted beneath equipment feet to adjust vertical positioning and achieve perfect alignment.
🛠️ Applications of Shims in Turbomachinery
Baseplate Leveling
Shims compensate for uneven foundations or mounting surfaces, ensuring the machine sits flat and aligned.
Thermal Expansion Compensation
In high-temperature environments, shims help maintain alignment despite thermal growth of components.
Shaft Alignment
Used during laser or dial indicator alignment procedures to correct vertical misalignment between shafts.
Maintenance & Realignment
During overhauls or bearing replacements, shims allow quick
🛠️ Applications of Shims in Turbomachinery
- Use corrosion-resistant materials like stainless steel in humid or chemical environments.
- Avoid stacking too many shims, which can cause instability — use thicker single pieces when possible.
- Label and document shim thicknesses during installation for future maintenance.
- Combine with laser alignment tools for precise results.
- Torque bolts evenly after shimming to prevent shifting.
Dimentional Data
Type
Size
A*B
C
H
M
STD Thickness
(mm)
ASC-1
40*40
13
20
16
ASC-2
50*50
17
25
18
0.05, 0.1, 0.2
ASC-3
75*75
21
37.5
18
0.4, 0.5
ASC-4
100*100
27
50
20
0.7, 1.0
ASC-5
125*125
45
62.5
30
1.2, 1.3
ASC-6
200*200
55
100
30
BOQ of Shims in a Case
Size
0.05
0.1
0.2
Thickness (mm)
0.4
0.5
0.7
1.0
2.0
Total Nos/box
ASC-1
20
20
20
20
20
20
20
10
150
ASC-2
20
20
20
20
20
20
20
10
150
ASC-3
20
20
20
20
20
20
20
10
150
ASC-4
20
20
20
20
20
20
20
10
150
- All dimensions are in mm unless otherwise specified.
- Individuals Shims come in a pack of 10 no’s.