DANLY IEM Inch & Metric Spring Retainers
Inch & Metric spring retainers by DANLY IEM securely support and hold components in position, improving stability and alignment in mixed dimensional assemblies. Designed for consistent operation, they help maintain strength without compromising reliability.
- Built to accommodate both inch and metric dimensions for consistent fit
- Provides secure component restraint to support stable assembly alignment
- Compatible with a range of outer and spring diameters for versatile use
- Used in spring-guided mechanisms where dependable retention is required
Specifications
9 configurations available
| D (Outer diameter) (mm) | Spring Diameter (mm) | L (Guide length) (mm) | D (Outer diameter) (in) | Spring Diameter (in) | L (Guide length) (in) |
|---|---|---|---|---|---|
| 16 | 32 | 43 | 5/8" | 1-1/4" | 1-11/16" |
| 16 | 32 | 56 | 5/8" | 1-1/4" | 2-3/16" |
| 16 | 32 | 68 | 5/8" | 1-1/4" | 2-11/16" |
| 19 | 38 | 43 | 3/4" | 1-1/2" | 1-11/16" |
| 19 | 38 | 56 | 3/4" | 1-1/2" | 2-3/16" |
| 19 | 38 | 68 | 3/4" | 1-1/2" | 2-11/16" |
| 25 | 50 | 43 | 1" | 2" | 1-11/16" |
| 25 | 50 | 56 | 1" | 2" | 2-3/16" |
| 25 | 50 | 68 | 1" | 2" | 2-11/16" |
Product Guide
Application Scenarios+
This type of spring retainer is used inside injection-molded assemblies where a coil spring must stay coaxial and reliably restrained during cycling. In appliance and industrial control housings, it helps maintain stable alignment between the spring and its guide to reduce play-related noise and premature wear on adjacent components.
For automotive connector and latch mechanisms (often mounted in plastic housings), mixed-dimensional stacks are common across variants. The inch/metric compatibility supports consistent fit across tooling programs while providing dependable retention, supporting smooth actuation over repeated cycles.
In medical device housings and precision spring-guided mechanisms, retention accuracy is critical to maintain force delivery and prevent spring wander. The available outer diameter and guide lengths let engineers match the retainer’s geometry to the spring diameter, improving concentric guidance without forcing redesign of the surrounding mold layout.
- Spring-guided plastic assemblies requiring coaxial restraint
- Mixed inch/metric designs where dimensional standardization is needed
- Applications prioritizing stable alignment under repeated cycling
Material & Process Details+
The provided product data does not specify a steel grade, heat-treatment state, or measured hardness for this DANLY IEM retainer series. As a result, material properties such as HRC, nitriding case depth, and tempering characteristics cannot be stated from the supplied specifications.
When selecting spring retainers for mold tooling support or spring-guided mechanisms, engineers should confirm the steel grade (e.g., tool steels like H13/AISI 420 family equivalents) and the expected wear vs. toughness trade-off from the manufacturer’s certificate or drawing revision. Typical practice is to select a hardened and tempered condition for balance of wear resistance and impact toughness, while other options may use surface hardening to improve galling resistance.
- Confirm grade and hardness (HRC) on the technical drawing
- Verify whether the part is quenched & tempered, pre-hardened, or surface treated
- Use measured hardness to predict wear life under spring contact loads
Sizing & Selection Guide+
Selection is primarily driven by matching the retainer’s outer diameter (D), spring diameter, and guide length (L) to the spring and the mold’s guided feature geometry. From the available options: D is 16 / 19 / 25 mm (5/8" / 3/4" / 1"), spring diameter is 32 / 38 / 50 mm (1-1/4" / 1-1/2" / 2"), and L is 43 / 56 / 68 mm (1-11/16" / 2-3/16" / 2-11/16").
- Choose the spring retainer variant where the listed spring diameter matches the coil’s OD used in your mechanism
- Match D to the mating bore/seat dimension in the mold cavity or core design
- Match L to the required guide engagement length to prevent spring wander
If your assembly requires clearance for assembly or thermal expansion, apply the retainer-to-bore fit based on your part drawing tolerance. Because tolerances are not provided in the input data, use the manufacturer’s drawing tolerance stack to confirm whether a sliding fit or restrained fit is intended for your application.
Frequently Asked Questions
Which retainer size should I select for a 38 mm (1-1/2") coil spring?+
Use the variant where the Spring Diameter is 38 mm (1-1/2"). Then match the outer diameter (D) to your guide seat using the available options of 19 mm (3/4") or 16/25 mm depending on cavity/core geometry.
Finally, set the required guide length (L) by selecting 56 mm (2-3/16") if that engagement length matches your design intent.
How do I translate D and L dimensions into core/cavity features for correct spring guidance?+
Match the retainer’s D (16/19/25 mm or 5/8"/3/4"/1") to the mold feature that forms the seat/bore in the assembled plastic part. Match L (43/56/68 mm or 1-11/16"/2-3/16"/2-11/16") to the required guide engagement so the spring is restrained against axial misalignment.
Because tolerances are not included in the provided data, use the manufacturer’s tolerance values to establish the intended fit (clearance vs. restrained seating).
Can this series be used in both inch and metric assemblies without changing the mold design logic?+
Yes. The series explicitly offers inch and metric options with corresponding ranges for D, spring diameter, and L (e.g., D: 16/19/25 mm and 5/8"/3/4"/1").
This supports maintaining the same retention and guidance concept across programs by selecting the inch or metric variant that matches your spring OD and mold feature geometry.
What hardness (HRC) or steel grade is specified for DANLY IEM inch/metric spring retainers?+
The supplied product data does not list a steel grade, heat treatment condition, or hardness value (HRC). To determine wear resistance and toughness expectations for your loading scenario, confirm these details from the official drawing or material certificate for series code 250300462351.
Once hardness is known, you can better estimate contact wear behavior where the spring and retainer interface under cycling loads.
What are the available dimension combinations for outer diameter, spring diameter, and guide length?+
Available ranges from the specification are:
- D (outer diameter): 16, 19, 25 mm (5/8", 3/4", 1")
- Spring Diameter: 32, 38, 50 mm (1-1/4", 1-1/2", 2")
- L (guide length): 43, 56, 68 mm (1-11/16", 2-3/16", 2-11/16")
Select the combination that matches your spring OD and the required guide engagement length in the molded assembly.
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