High-Performance DIN 9834 Oilless Guide Bearings

Bronze with Collar and Graphite Plugs – ISO 9448 Equivalent

These DIN 9834 guide bearings are precision components manufactured to DIN 9834 specifications (fully equivalent to ISO 9448), featuring an integrated collar that provides secure axial location and improved rigidity.graphite bronze bushings

The bearing consists of a high-strength bronze base with embedded solid graphite plugs. This design delivers continuous dry lubrication—no oil or grease is ever required. They are engineered for reliable sliding guidance under combined radial and axial loads, excel in low-to-moderate speed and high-load conditions, and perform exceptionally well in enclosed tooling areas or locations where routine lubrication access is limited or impractical.

Common Mounting Positions in Dies and Molds

  • Guide pillars and leader pins in progressive stamping dies and transfer tooling
  • Slide cores, angled lifters, and ejector assemblies in injection molds
  • Stripper plates, punch guides, and movable sections in compound dies or fine-blanking tools
  • Guide posts in multi-station presses and automated forming lines

The collar design prevents axial movement or rotation, making these bearings particularly effective under impact loads or eccentric forces frequently encountered in high-cycle production.

Material Details and Equivalent / Interchangeable Options

Base alloy: CuZn25Al5Mn4Fe3 (high-performance aluminum bronze offering excellent mechanical strength, thermal conductivity, and resistance to wear and scoring). Lubrication system: Graphite plugs distributed across 25–35% of the sliding surface, creating a self-renewing transfer film during operation.

This combination provides better dry-running performance and impact resistance than plain bronze bushings or conventional oil-impregnated sintered types, while maintaining precise tolerances over extended service life.

Widely accepted equivalents and direct drop-in replacements include:

  • Standard DIN 9834 / ISO 9448 compliant bronze guide bushings with collar and solid lubricant from major mold component catalogs
  • Maintenance-free bronze guide bushes with graphite inserts and shoulder/collar design
  • Graphite-plugged aluminum bronze collar bushings matching DIN 9834 dimensions
  • Other suppliers of self-lubricating guide elements conforming to the same DIN 9834 / ISO 9448 standard and tolerances (H7 bore fit, standard collar heights and outer diameters)

Tool rooms routinely interchange these during die rebuilds or upgrades due to closely aligned dimensions, lengths, collar features, and tolerance classes across compliant manufacturers.

Proven Examples from Real Tooling Operations

  • A stamping facility producing metal brackets in progressive dies replaced conventional greased bushings with these DIN 9834 graphite-plugged collar bearings on primary guide pillars. The tooling ran continuous shifts for over 18 months without any relubrication or seizure, significantly reducing unplanned stops and maintaining tight part tolerances throughout the campaign.
  • In a multi-cavity injection molding operation processing abrasive filled resins, the bearings were installed on slide cores. The graphite lubrication prevented galling and dimensional drift in this high-cycle, dirty environment, extending required maintenance intervals from quarterly to over one year.
  • On a heavy-gauge transfer press line, these collar bearings were fitted to stripper plate guides. The secure collar design effectively resisted off-center loading, reducing misalignment-related scrap and ensuring stable tolerances across long production runs.

These field examples demonstrate consistent reductions in maintenance effort and extended tooling service life in high-impact, hard-to-service sliding applications.

Key Advantages Over Traditional Lubricated Bearings

  • Complete removal of routine lubrication → eliminates grease fittings, oil lines, and contamination risks
  • Stable low-friction sliding from the continuously renewing graphite transfer film, even under elevated temperatures
  • Rapid heat dissipation through the bronze matrix combined with strong resistance to debris scoring and side loads
  • Lower total operating costs through reduced downtime, fewer tooling teardowns, and cleaner production environments

Next Steps for Your Tooling Project

View complete dimensional tables, tolerance specifications, load capacity data, and downloadable 3D CAD files on Bearingface.com.

Request a quotation for standard stock sizes, custom variants, or evaluation samples—we offer prompt global shipping and technical support to match these bearings to your existing guide system. Contact us if you need assistance selecting the correct configuration for your current die or mold setup.

Bronze with Collar and Graphite Plugs (ISO 9448 Equivalent)

All dimensions are in mm. Tolerances are specified where applicable (bore d in H7, outer diameter D in h6). These bearings feature a collar (flange) for axial positioning. P = recommended mounting hole pitch circle diameter (for fixing screws/clamps). t = chamfer depth or similar edge break. r = radius or chamfer on collar edge. b×c = keyway or groove dimensions (where present for anti-rotation).

DIN 9834 Oilless Guide Bearing Dimensions

Standard No. d (H7) D (h6) L D1 L1 L2 t r b×c P
DIN9834-025 25 +0.021 / 0 32 -0.016 / 0 40 40 30 3 6.3 3 0.6×0.3 58
DIN9834-032 32 +0.025 / 0 40 50 50 40 4 – – – 66
DIN9834-040 40 50 63 63 50 5 – – – 79
DIN9834-050 50 63 -0.019 / 0 71 71 56 6.3 5 – – 89
DIN9834-063 63 +0.030 / 0 80 90 90 63 8 10 6 1.0×0.4 123
DIN9834-080 80 100 -0.022 / 0 100 112 80 10 8 – – 143
DIN9834-100 100 125 -0.025 / 0 125 140 106 12.5 10 – – 168
DIN9834-125 125 +0.040 / 0 160 160 180 130 16 12 – – 203
DIN9834-160 160 200 -0.029 / 0 200 220 168 16 18 – – 243

Notes on the table:

  • For smaller sizes (e.g., 025 to 050), tolerances on D are as listed; larger sizes follow standard h6 progression.
  • L is the total installed length (including collar thickness).
  • D1 is the collar outer diameter.
  • L1 is the body length below the collar.
  • L2 is the collar thickness.
  • P is the PCD (pitch circle diameter) for mounting holes (typically 2–4 holes depending on size).
  • Chamfer t and radius r vary by size; b×c indicates optional anti-rotation groove on collar (common on smaller sizes).
  • All values are standard per DIN 9834 / ISO 9448 for self-lubricating bronze guide bushings with collar. Custom lengths or slight variations may be available.

Clamp VDI-KL (for DIN 9834 Guide Bearings)

These clamps secure the bearing in the mounting hole (recommended bore tolerance H7). Made from steel (e.g., ST37K or equivalent), they press the collar shoulder firmly against the plate surface for rigid fixation.

Standard No. W L T L1 L2 t d d1 h Applicable Bushes ID (d)
VDI-KL-6 20 20 10 7.5 5 6.3 7 11 7 φ25 ~ φ50
VDI-KL-10 32 32 16 11 10 10 11.5 17.5 11.5 φ63 ~ φ160

Notes on clamps:

  • W = width, L = length (base), T = thickness.
  • d = screw hole diameter (use appropriate socket head cap screws, e.g., M6 for VDI-KL-6, M10 for VDI-KL-10).
  • Typically 2 clamps per bearing (opposite sides) for secure clamping.
  • Applicable to the inner diameter range of the guide bearing (d).
  • Mounting: Fit bearing into H7 bore, align collar, tighten clamps to squeeze shoulder flat against plate.

For full CAD files, detailed tolerances, or load ratings, check Bearingface.com. Need a specific size quoted or matched to your tooling? Contact us for fast support!