A quotation for a custom felt washer needs more than a photograph and an outside diameter. Start with the outside diameter, hole diameter, thickness, material requirements and drawing revision. Identify which dimensions control the fit and agree on how they will be checked.

That gives each supplier the same part to quote. It also creates a reference for reviewing samples and repeat orders.

Label both diameters

For a simple ring, mark the outside diameter and the center-hole diameter separately. State the units. If the hole must be centered within a particular limit, show that requirement rather than leaving it to visual judgment.

For slots, additional holes or an irregular outline, provide a dimensioned drawing. A photo can explain where the washer goes, but it should not be the only source of dimensions.

Explain where the thickness matters

Say whether the stated thickness refers to the loose part or to the part under an agreed measuring condition. Felt can change shape under pressure, so the way it is measured matters to a useful comparison.

If the washer sits inside an assembly, describe the available space and the intended installation. Do not ask the supplier to infer a functional specification from an old, compressed sample alone. A used sample is helpful context; it may no longer represent the original dimensions.

Keep the material requirement separate

Two parts cut to the same outline are not necessarily interchangeable. Identify the required fiber composition and any material grade or approved reference you already use. Where density or another property is important, state the requirement and the method used to evaluate it.

Explain the application, including relevant contact materials and operating conditions. A similar-looking washer in a catalog is not proof that it will work in your equipment. Application suitability needs its own review.

Agree on inspection before production

Mark the dimensions that are critical to assembly. Ask the supplier to confirm achievable tolerances and the proposed inspection method before samples are made. Avoid applying an arbitrary precision requirement to every dimension when only one feature controls the fit.

Keep an approved drawing and sample together. Put the revision number on the purchase order, and record any agreed changes in writing. This helps prevent a repeat order from being made to an earlier version.

Buyer questions

Can I request a quotation from an existing washer?

Yes, but tell the supplier whether it is new or used. Confirm the dimensions and material requirements before treating it as the production reference.

Does matching the dimensions establish suitability?

No. Material behavior and the conditions inside the assembly also need to be assessed.

What should I send with an inquiry?

Send the drawing revision, quantity, material requirement, intended use and any existing inspection criteria. Add assembly photos if they help explain the fit.

See ROLKING felt washers and include your drawing with the inquiry so the proposed part can be discussed clearly.