KAIFIL manufactures machined stainless steel locating rings for metal filter inserts, holders and end assemblies. Plain, stepped and flanged profiles establish the radial position, seating height and repeatable fit of the filter within its mating component.
Share a drawing, reference sample or application requirements to discuss the configuration.
Machined locating ring with a stepped bore
Locating-ring bore and flat seating face
Low-angle view of a machined locating ringMachined locating ring with a stepped bore
A locating ring establishes where the filter sits inside a holder or end assembly. The pilot diameter controls radial alignment, while the shoulder or axial face sets the installation height. Defining these functions separately makes the ring easier to specify and helps preserve filter alignment when the assembly is opened and rebuilt.
Plain rings provide a controlled bore and outside diameter in a compact section. Stepped rings add a pilot and shoulder for simultaneous centering and axial seating. Flanged rings add a wider face for attachment holes or contact with the holder. The geometry follows the mating parts, with lead-in chamfers and edge relief where needed for assembly.
We define the primary locating diameter and its reference face first. The remaining bore, shoulder, hole pattern and groove are dimensioned from those datums. A close outside fit is useful only if the bore and seating face remain correctly related to it. For thin rings, the drawing also identifies the measurement condition so clamping does not disguise distortion.
Turning and boring create the circular locating surfaces and axial shoulders. Milling or drilling adds mounting holes, reliefs and anti-rotation features. Contact edges are deburred, and surfaces can be specified as machined, polished or passivated. Seal-contact faces and grooves receive their own surface requirements when the ring also carries a gasket or O-ring.
A removable filter normally needs a defined clearance fit so it can be seated and withdrawn without damage. Temperature changes, material pairing and residue in the joint can alter removal force. Set pilot clearance, shoulder height and the complete tolerance stack together; an unnecessarily tight ring can make maintenance difficult without improving filtration.
The locating ring positions the component; a specified seal closes the joint; the mesh or sintered medium performs filtration. We can coordinate these parts in a filter-holder assembly while retaining separate dimensions for each function. A filter screen can be retained at the bore when the drawing includes its seat and fixing method.
The locating ring belongs between the filter element and its holder. In a disc holder, its bore surrounds the disc seat while its pilot locates the holder assembly. In a cylindrical insert, the shoulder sets the installed axial position. The bill of materials lists ring, filter medium, gasket or O-ring and retaining hardware separately. Assembly inspection checks the locating diameter and seated height first, then verifies seal contact and an unobstructed flow opening.
For a filter holder connected with an inch-size clamp fitting, identify the nominal connection together with the ferrule flange outside diameter d6 and the flow bore d1. The 1 in and 1½ in connections both have a 50.5 mm flange, while their bores are 22.1 and 34.8 mm respectively. Recording both dimensions identifies the intended flow opening and seal interface when the connection is assembled.
The locating ring is machined to its own holder drawing in 304 or 316L stainless steel. Specify its outside diameter, bore, pilot diameter, shoulder height and axial seating face from the holder datums. A ring that also retains a filter disc has a defined disc seat and retention feature; the gasket contact profile and compression belong to the seal detail. This separates the connection size, the ring’s centering fit and the active filter opening in the same assembly.
| Component / interface | Defined function and inspection |
|---|---|
| Filter disc seat | Supports the disc perimeter and defines its retaining diameter |
| Locating pilot | Centers the ring relative to the holder datum |
| Axial shoulder | Sets element position and stack height |
| Seal groove or face | Carries the separate O-ring or gasket |
| Retainer | Holds the stack without covering the active filter area |
| Nominal connection (in) | Ferrule flange OD d6 (mm) | Flow bore d1 (mm) |
|---|---|---|
| 1 | 50.5 | 22.1 |
| 1½ | 50.5 | 34.8 |
| 2 | 64 | 47.5 |
| 2½ | 77.5 | 60.2 |
| 3 | 91 | 72.9 |
| 4 | 119 | 97.4 |
| Supply item | Order basis |
|---|---|
| Production lead time | 2–3 weeks after order and drawing confirmation. |
| Trial orders | Small trial quantities for fit and process evaluation. |
| Regular production orders | 50 pieces or US$3,000 per order. |
| Quotation basis | Material, finished dimensions, section geometry, mating interface and quantity. |
| Parameter | Specification | Notes |
|---|---|---|
| Profile options | Plain / stepped / flanged | Select the locating and seating features from the mating assembly. |
| Material | 304 / 316L | Match contact media and adjacent metal parts. |
| Locating functions | Radial centering / axial seating / spacing | Identify which diameter and face perform each function. |
| Manufacturing route | Turning / boring / facing; drilled or milled features | Circular datum features are coordinated in the machining plan. |
| Main dimensions | OD × bore × overall height | Add shoulder diameter and step height for stepped parts. |
| Pilot fit | Defined clearance / specified transition fit | Removable assemblies need installation and extraction clearance. |
| Datum system | Locating diameter + axial reference face | Dimension the bore, shoulder and mounting pattern from the same datums. |
| Geometry controls | Runout / perpendicularity / flatness / coaxial relationship | Use the drawing control appropriate to each mating feature. |
| Mounting details | Bolt holes / counterbores / notches / anti-rotation features | Set locations relative to the locating datum. |
| Edge condition | Deburred edges / lead-in chamfers / corner reliefs | Preserve the width of functional locating lands. |
| Seal interface | Separate gasket face or O-ring groove | Specify seal material, groove and compression separately. |
| Supply format | Loose ring / matched filter-holder assembly | Screen, seal and hardware can be identified as separate assembly items. |
| Mating inch-size clamp connections | 1 / 1½ / 2 / 2½ / 3 / 4 in | The table identifies the mating ferrule flange and flow bore. Ring OD, pilot, bore and height are dimensioned on the filter-holder drawing. |
Materials: 304 and 316L stainless steel. Material is coordinated with the filter, holder and wet-contact surfaces.
Examine the part profile, contact faces and construction details.
Locating-ring bore and flat seating face
Low-angle view of a machined locating ring
Include these details when discussing your requirements.
A stepped bore centers a filter disc and sets its seat relative to the holder.
A pilot and shoulder position the filter end connection in its mating component.
Machined rings coordinate the screen end, support structure and removable holder.
A locating ring primarily controls position through its bore, pilot and datum face. A support ring primarily transfers load and reinforces the filter structure. One part can combine the functions when the drawing defines both.
Yes. The groove is defined with its own width, depth, diameter and surface condition, alongside the locating dimensions. The O-ring compound and cross section are selected separately.
The ring is made around the mating filter and holder. Provide the bore, pilot, height and shoulder dimensions so the part fits the assembly directly.
Assign the required fit to the locating diameter and use geometric controls for the related bore and face. This gives functional surfaces the necessary accuracy without making every non-contact surface equally tight.
Yes. A holder assembly can include a wire-mesh or sintered-mesh disc, with its seating diameter and retention method defined separately from the ring’s external fit.
No. A removable filter needs enough clearance for assembly, temperature changes and cleaning deposits. Select a fit that maintains alignment while allowing the intended maintenance procedure.
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