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Peelable Shims
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Peelable Shims, Washers and Spacers

Providence Group is an exclusive representative of Shimco, an original manufacturer of peelable shims, in Belarus and Ukraine.

Peelable (Laminated) Shim

Laminated shim was manufactured for use in an aerospace application. Primary manufacturing processes consist of shearing, drilling, and milling to fabricate this shim to the exact measurements specified by the customer in order to ensure a perfect fit upon application.


Shim Thickness: Having calculated the maximum variation that may result from tolerance accumulation, it is recommended that shim thickness be specified at just above that figure. Fully laminated sheet thicknesses range from 0.15mm (0.006”) to 20.3mm (0.80”).

 

Foil Thickness: Foils ranging from 0.025mm (0.001”) or 0.1mm (0.004”) are used in the manufacture of standard shim stock and will impact on the final degree of accuracy achieved on the assembly fit. Foils of 0.05mm (0.002”) or 0.075mm (0.003”) normally satisfy most assembly demands.

 

Capabilities Processes

Primary: Shearing, CNC Machining Drilling, Milling

Secondary: Deburring, Marking Stamp with Part Number

 

Overall Part Dimensions Length: 2.20"

Width: 0.900"

Thickness: 0.125"

Tightest Tolerances ± 0.002"

 

Material: Aluminum

 

Edgebond Shim

Used within an engine mount application in the aerospace industry, this custom shim was machined from aluminum and consists of 63 layers edgebond glued to form a thickness measuring only .187". Edgebonding offers the flexibility for peeling layers to suit specific tolerances, and each peeled layer can be re-used used as a single shim. For this part, each of the 63 layers measured slightly less than .003" thick.

 

Capabilities Processes

Primary: Shearing, CNC Machining, Mill Part as Per Drawing

Gluing: Edgebond Glue 63 Layers to form a Thickness of .187"

Secondary: Deburring, Marking Stamp with Part Number

 

Overall Part Dimensions Length: 2.30"

Width: 1.10"

Thickness: 0.187"

Tightest Tolerances ± 0.006"

 

Material: 1100 Aluminum

 

Washers/Spacers

Custom CNC Milling /Processes

Primary: Shearing, CNC Machinings, Mill Part as Per Drawing, Drilling, CNC Milling

Gluing: Edgebond Glue 63 Layers to form a Thickness of .187"

 

Secondary: Deburring, Abrasive Blasting, Passivation, Marking Stamp with Part Number

 

Overall Part Dimensions Length: 7.201"

Width: 1.302"

Thickness: 0.062" 

Tightest Tolerances ± 0.002"

 

Material: Mylar

 

Tapered Shims

Tapered shims are precision CNC milled. They are intended for use in an assembly application. Secondary operations included deburring and part marking the part number onto the shim using an ink-jet part marking machine.

 

The 2024-T3 aluminum CNC milled part was primed and anodized with a chromic acid finish. It measured 0.400” long, 0.240” wide and 0.020” to 0.100” high and performed dimensional inspections.

 

Precision Machining Capabilities Processes

Primary: Custom Fixtures, Design & Manufacture Work Holding Fixture for Milling Operations Custom Fixtures Mill Taper

Secondary: Deburring, Part Marking Ink-jet Part Number

 

Overall Part Dimensions  Length: 0.400”

Width: 0.240”

Height: 0.020” to 0.100”

Tightest Tolerances ± 0.002”

 

Material: 2024-T3 Aluminum Per AMS-QQ-A-250/5

Material Finish: Chromic Acid Anodize & Primer 

 

Polyimide Laminated Shim

The part measured 8.745” long and 5.937” wide with a thickness of 0.048”. The polyimide was as per AMS-DTL-22499 composition 6, type 1, class 1.

 

Custom CNC Milling Capabilities Processes

Primary: Shearing, Custom Fixtures, Design & Manufacture Work Holding Fixture for Milling Operations, CNC Milling Mill Profile, Mill Contour, Drill & Mill Center Hole

Secondary: Marking Ink-Jet Part Number

 

Overall Part Dimensions  Length: 8.745”

Width: 5.937”

Material Thickness: 0.048” 

Tightest Tolerances ± 0.002”

 

Material: Polyimide Per AMS-DTL-22499 Composition 6 Type 1 Class 1

Material Finish: Laminated

 

Solid Shims

Custom CNC Milling Capabilities Processes

Primary: Shearing, CNC Machining Mill Part as Per Drawing, Drill 14 Holes, CNC Milling

Gluing: Edgebond Glue 63 Layers to form a Thickness of .187"

 

Secondary: Deburring, Marking Stamp with Part Number

 

Overall Part Dimensions Length: 2.75"

Width: 1.50"

Thickness: .050"

Tightest Tolerances ± 0.00"

Material: 321 Stainless Steel Annealed AMS 5510

 

Machined and Formed Shims

Capabilities Processes

Primary:

Custom Design & Manufacture Work Holding Fixture for Milling Operations CNC Milling Mill Profile, Drilling, Boring, Mill Ears, Mill Keyway

Secondary: Heat Treatment Quench & Temper, Rc 93-98, Marking Engraved with Part Number

 

Overall Part Dimensions Length: 0.740”

Height: O.D.: 03.370” 

Tightest Tolerances +0.000”/-0.010”

True Position of 0.005”

Circular Rubout of 0.005”

Parallelism of 0.001”

Material: 4340 Steel

Max Surface Finish: 63RMS

Material Finish: Parts Dipped in Rust Preventing Oil Per MIL-L-6085 or MIL-C-16173C Grade 3

Peelable shims also could be used in automotive industry and in manufacturing heavy equipment for such purposes as 1) adjustment of taper roller bearings; 2) alignment of transmission components; and 3) compensation of the height difference between motors and bumps.