The SKF SNL 515-612 is a versatile, two-piece split plummer (pillow) block housing from the SNL 2, 3, 5 and 6 series, designed to be the first choice for design, quality and economy in bearing arrangements. It enables incorporated bearings to achieve maximum service life with reduced maintenance requirements, making tailored housings virtually unnecessary and enabling cost-effective solutions across various industrial applications.
Key Features
- Easy Installation: Split design allows for simple mounting and dismounting without removing the shaft
- Cost-Effective: Versatile design accommodates various bearings and seals, eliminating need for custom housings
- Maintenance-Friendly: Optimized lubrication system minimizes lubricant leakage and extends relubrication intervals
- Robust Construction: High-quality cast iron material ensures durability in demanding industrial environments
- Flexible Sealing Options: Compatible with various SKF seal designs (four-lip, V-ring, labyrinth, heavy-duty felt) for different application requirements
Technical Specifications (Metric & Imperial)
Core Dimensions
| Parameter | Metric | Imperial |
|---|
| Bearing seat diameter (Dₐ) | 130 mm | 5.1181 in |
| Bearing seat tolerance class | G7 | G7 |
| Bearing seat width (Cₐ) | 56 mm | 2.2047 in |
| Centre height (H₁) | 80 mm | 3.1496 in |
| Overall length (L) | 280 mm | 11.0236 in |
| Overall width (A) | 115 mm | 4.5276 in |
| Overall height (H) | 155 mm | 6.1024 in |
| Bore diameter (Dᵦ) | 87 mm | 3.4252 in |
| Foot width (A₁) | 80 mm | 3.1496 in |
| Foot height (H₂) | 30 mm | 1.1811 in |
Mounting & Fastening
| Parameter | Metric | Imperial |
|---|
| Number of bolt holes | 2 | 2 |
| Attachment bolt diameter | 16 mm | 0.6299 in |
| Distance between attachment bolts (J) | 230 mm | 9.0551 in |
| Recommended tightening torque for attachment bolts | 200 Nm | 147.51 lbf·in |
| Cap bolt size | M12x65 | M12x65 |
| Cap bolt tightening torque | 80 Nm | 59.00 lbf·in |
| Length of attachment bolt hole (N) | 24 mm | 0.9449 in |
| Width of attachment bolt hole (N₁) | 18 mm | 0.7087 in |
Materials & Protection
| Parameter | Details |
|---|
| Housing material | Cast iron |
| Corrosion protection | Paint - in accordance with ISO 12944-2, corrosivity category C2 |
| Net weight | 7.42 kg (16.36 lb) |
Lubrication & Sealing
| Parameter | Details |
|---|
| Lubrication method | Grease |
| Relubrication hole thread (G₁) | 1/8-27 NPSF (G 1/8) |
| Initial grease fill (20%) | 125 g (4.41 oz) |
| Initial grease fill (40%) | 210 g (7.41 oz) |
| Included accessories | AH 1/8-27 PTF grease fitting |
Seal Groove Dimensions
| Parameter | Metric | Imperial |
|---|
| Seal groove diameter (Dᶜ) | 95.5 mm | 3.7598 in |
| Inside width between seal grooves (A₃) | 88 mm | 3.4646 in |
| Width of seal groove (A₄) | 5 mm | 0.1969 in |
| Distance to seal groove back face (A₅) | 9 mm | 0.3543 in |
| Width at bore diameter (A₆) | 13 mm | 0.5118 in |
Dowel Pin Dimensions
| Parameter | Metric | Imperial |
|---|
| Distance between dowel pins (J₆) | 257 mm | 10.1181 in |
| Axial offset of dowel pins (J₇) | 29 mm | 1.1417 in |
| Maximum diameter of dowel pins (N₄) | 8 mm | 0.3150 in |
Mechanical Performance
| Breaking Load | Value |
|---|
| P₀° (0° load angle) | 290 kN (65,194 lbf) |
| P₅₅° (55° load angle) | 410 kN (92,171 lbf) |
| P₉₀° (90° load angle) | 250 kN (56,202 lbf) |
| P₁₂₀° (120° load angle) | 185 kN (41,589 lbf) |
| P₁₅₀° (150° load angle) | 160 kN (35,969 lbf) |
| P₁₈₀° (180° load angle) | 205 kN (46,089 lbf) |
| Pₐ (axial breaking load) | 135 kN (30,349 lbf) |
Yield Points of Cap Bolts
| Load Angle | Value |
|---|
| Q₁₂₀° (120°) | 220 kN (49,458 lbf) |
| Q₁₅₀° (150°) | 125 kN (28,101 lbf) |
| Q₁₈₀° (180°) | 110 kN (24,729 lbf) |
Compatible Bearings
The SNL 515-612 housing is designed for use with:
- Self-aligning ball bearings (dimension series 02, 03)
- Spherical roller bearings (dimension series 22, 23, 32)
- CARB toroidal roller bearings
- Typically used with adapter sleeves (e.g., AH 315) or on stepped shafts with cylindrical seats
Applications
Ideal for various industrial applications including:
- Fans and blowers
- Conveyor systems
- Pumps and compressors
- General industrial machinery requiring reliable, low-maintenance bearing support
